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Electronic Brake-Force Distribution Control Methods of ABS-Equipped Vehicles During Cornering Braking 认领 引用 被引量：9
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作者 王国业 刘昭度 +1 位作者 马岳峰 齐志权 《Journal of Beijing Institute of Technology》 EI CAS 2007年第1期34-37,共4页
Based on the dynamics of ABS-equipped vehicles during cornering braking, the electronic brake- force distribution （EBD） control methods of ABS-equipped vehicles during cornering braking are proposed. According to th... Based on the dynamics of ABS-equipped vehicles during cornering braking, the electronic brake- force distribution （EBD） control methods of ABS-equipped vehicles during cornering braking are proposed. According to the dynamics and the tire model under tire adhesion limit, the stability acceptance criteria of vehicles during cornering braking are proposed. According to the stability acceptance criteria and the ABS control, the EBD control methods of ABS-equipped vehicles during cornering braking are implemented by adjusting the threshold values of tires slip independently. The vehicle states during cornering braking at two typical initial velocities of the vehicle are analyzed by the EBD control methods, whose results indicate the EBD control methods can improve the braking performances of the vehicle during cornering braking comparing with the ABS control. 展开更多
关键词 electronic brake-force distribution（EBD） cornering braking control methods
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Investigations on control algorithm of steady-state cornering and control strategy for dynamical correction in a steer-by-wire system 认领 引用 被引量：2
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作者 Ying XU Chang-fu ZONG +1 位作者 Hsiao-hsiang NA Lei LIU 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2009年第6期900-908,共9页
To improve the handling performance of a steer-by-wire (SBW) vehicle, a series of control logics are proposed. Firstly, an algorithm for enhancing the maneuvering in steady-state cornering is presented. On this basis,... To improve the handling performance of a steer-by-wire (SBW) vehicle, a series of control logics are proposed. Firstly, an algorithm for enhancing the maneuvering in steady-state cornering is presented. On this basis, two categories of control strategies are used to dynamically correct and compensate the transient state steering responses and vehicle behaviors. Simulator tests including subjective evaluations and virtual field tests are both conducted to make comprehensive investigations on the series of control logics. The subjective evaluations demonstrate that the SBW vehicle with a specifically selected value of steering sensitivity tends to be more desirable for driving than a conventional one in which a fixed steering ratio exists. The virtual field tests indicate that the control strategies for dynamical correction and compensation could effectively improve the handling per-formances of an SBW vehicle by reducing the work load of drivers, enhancing the track-holding performance, and improving steering response properties. 展开更多
关键词 Steer-by-wire （SBW） Steady-state cornering Steering sensitivity Dynamical correction
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Steady-State Cornering Properties of a Non-pneumatic Tire with Mechanical Elastic Structure 认领 引用 被引量：3
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作者 Fu Hongxun Zhao Youqun +2 位作者 Lin Fen Du Xianbin Zhu Mingmin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2017年第5期586-592,共7页
Mechanical elastic wheel(ME-wheel)is a new type of non-inflatable safety tyre,and the structure is significantly different from traditional pneumatic tyre.In order to investigate cornering properties of ME-wheel,exper... Mechanical elastic wheel(ME-wheel)is a new type of non-inflatable safety tyre,and the structure is significantly different from traditional pneumatic tyre.In order to investigate cornering properties of ME-wheel,experimental research on mechanics characteristics of ME-wheel under steady-state cornering conditions are carried out.The test of steady-state cornering properties of ME-wheel at different experimental parameter conditions is conducted by test bench for dynamic mechanical properties of tyre.Cornering property curves are used to analyze the steady-state cornering properties of ME-wheel,namely the variation tendency of lateral force or aligning torque with the increase of side-slip angle.Moreover,evaluation indexes for cornering properties of ME-wheel are extracted and the effect of different experimental parameters(including vertical load,friction coefficient,and speed)on cornering properties of ME-wheel is contrastively analyzed.The proposed research can provide certain reference to facilitate structure parameters and cornering properties optimizing process of ME-wheel. 展开更多
关键词 tyres non-pneumatic tyre mechanical elastic structure steady-state cornering properties
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Higher-order topological states and magnetic field control in elastic metamaterials 认领 引用 被引量：1
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作者 Yuqi Tang Weijian Zhou +3 位作者 Yangwei Mai Yingjie Chen Zheng Zhong Weiqiu Chen 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第3期138-145,共8页
Recently,the concept of higher-order topological insulators has aroused widespread attention and research interest.However,current studies have predominantly focused on the domain of acoustic waves.Compared to acousti... Recently,the concept of higher-order topological insulators has aroused widespread attention and research interest.However,current studies have predominantly focused on the domain of acoustic waves.Compared to acoustic waves,elastic waves are vector waves,making their study more complex and challenging.Therefore,achieving higher-order topological states in elastic waves holds significant research value.In this paper,we proposed the design of an intelligent topological metamaterial,which is composed of magneto-rheological thin layers and an elastic substrate.First,by adjusting the topological structure,we successfully excited first-order topological states of Lamb waves in numerical simulations.Subsequently,we constructed a two-dimensional topological structure to excite zero-order topological corner states.Given the unique advantages of magnetic fields in regulating material properties and behaviors,we investigated the effects of magnetic fields as an external control mechanism on Lamb waves in magneto-rheological materials.Our analysis focused on the regulation of Lamb wave topological edge states and corner states via magnetic fields.The results demonstrate that by varying the magnetic field strength,we can precisely control the characteristics of the topological states.Magnetic field modulation of the topological states in Lamb waves enables the realization of non-contact,controllable phononic devices,which is of great significance for the development of topological acoustics. 展开更多
关键词 Lamb waves Topological insulators Topological edge states Topological corner states Magnetic field modulation
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Simulation investigation of tractive energy conservation for a cornering rear-wheel-independent-drive electric vehicle through torque vectoring 认领 引用 被引量：7
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作者 SUN Wen WANG JunNian +2 位作者 WANG QingNian ASSADIAN Francis FU Bo 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2018年第2期257-272,共16页
Although electric vehicle fully exhibits its comparative merits of energy conservation and environmental friendliness, further improvement of its traction energy efficiency lacks comprehensive investigations in the pa... Although electric vehicle fully exhibits its comparative merits of energy conservation and environmental friendliness, further improvement of its traction energy efficiency lacks comprehensive investigations in the past. In this paper, the effect of the torque vectoring on traction energy conservation during cornering for a rear-wheel-independent-drive electric vehicle is investigated.Firstly, turning resistance coefficient and energy conservation mechanism of torque vectoring are derived from the single track dynamic model. Next, an optimal torque vectoring control strategy based on genetic algorithm is proposed, with the consideration of the influence of the operation-point change of the in-wheel motors, to find out the best torque vectoring ratio offline. Finally,various simulation tests are conducted to validate the energy conservation effect after Simulink modelling. The results verify that though the optimization of the operating region of the motors is the main part for tractive energy conservation, the contribution of torque vectoring itself can reach up to 1.7% in some typical cases. 展开更多
关键词 electric vehicle （EV） independent drive cornering resistance torque vectoring energy saving optimization
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Magnetization-Induced Higher-Order Topological Effects in Quantum Spin Hall Insulators 认领 引用
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作者 Xiang-Long Yu Jie Wang +2 位作者 Pei-Hao Fu Da-Yong Liu Dao-Xin Yao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第7期135-138,I0106-I0114,共4页
Higher-order topological phases offer a promising platform for low-dissipation electronic and spintronic devices,motivating the search for experimentally accessible control schemes.Here we investigate higher-order top... Higher-order topological phases offer a promising platform for low-dissipation electronic and spintronic devices,motivating the search for experimentally accessible control schemes.Here we investigate higher-order topological states in a rhombic geometry of two-dimensional group-IVA materials subjected to external magnetic fields,described by a modified Kane-Mele model with next-nearest-neighbor Rashba spin-orbit coupling.We identify two distinct types of corner modes governed by different physical mechanisms:under out-ofplane magnetization,corner states emerge at the acute angles due to boundary hybridization induced by spin-orbit coupling,whereas under in-plane magnetization,corner modes appear at the obtuse angles as topologically protected Jackiw-Rebbi solitons arising at the domain wall between boundaries with different topological invariants.Using first-principles-based parameters for realistic materials including silicene,germanene,and stanene,we show that the obtuse-angle corner states are robust and enhanced in systems with stronger spin-orbit coupling.Our results establish a feasible route for magnetically creating and controlling higher-order topological states,enabling reconfigurable corner-mode-based topological devices. 展开更多
关键词 corner modes external magnetic fieldsdescribed identify two distinct types corner modes external magnetic fields physical mechanisms magnetization quantum spin hall insulators experimentally accessible control schemeshere
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Topological Corner States due to Boundary Defects 认领 引用
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作者 Yiqi Zhang Yuwei Hu +1 位作者 Yongdong Li Ce Shang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第1期44-48,共5页
In conventional higher-order topological insulators(HOTIs),the emergence of topological states can be explained by using the nonzero bulk polarization index.However,corner states emerge in HOTIs with incomplete bounda... In conventional higher-order topological insulators(HOTIs),the emergence of topological states can be explained by using the nonzero bulk polarization index.However,corner states emerge in HOTIs with incomplete boundary unit cells(i.e.,boundary defects)even though the bulk polarization is zero,which challenges the conventional understanding of HOTIs.Here,based on a Kekul´e-distorted honeycomb lattice with incomplete unit cells,we reveal that incomplete unit cells exhibit fractional charges through the analysis of Wannier centers by developing a compensation method and creating the concept of Wannier center domain(WCD)which is the smallest region that one Wannier center occupies.This method compensates for the missing parts of these boundary incomplete unit cells with additional WCDs to make them complete.The compensated WCDs automatically carry the corresponding charge,and this charge together with that of the incomplete unit cell constitutes the total charge of the complete unit cell after compensation.We conclude that the emergence of corner states is attributed to the filling anomaly,which is a fundamental mechanism.Our results refresh the understanding of HOTIs,especially those with structural discontinuities,and provide a novel design for topological states which have application value in producing optical functional devices. 展开更多
关键词 unit cellswe higher order topological insulators topological corner states boundary unit cells ieboundary incomplete unit cells bulk polarization index fractional charges emergence topological states
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Letter from the Editor-in-Chief 认领 引用
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作者 Kwok-Fai So 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第1期5-5,F0002,共1页
Dear colleagues,authors,reviewers,and readers,As we bid farewell to another remarkable year,I am filled with immense gratitude and pride for the strides we have made together in advancing the field of neural regenerat... Dear colleagues,authors,reviewers,and readers,As we bid farewell to another remarkable year,I am filled with immense gratitude and pride for the strides we have made together in advancing the field of neural regeneration.On behalf of Neural Regeneration Research(NRR),I extend my heartfelt thanks to our dedicated editorial board members,reviewers,authors,readers,and the NRR staff.Your unwavering commitment and support have been the cornerstone of our success,and without your contributions,the journal would not have achieved the milestones we celebrate today. 展开更多
关键词 behalf corners filled
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Higher-Order Topological Rainbow Effect in Non-Hermitian Acoustic Kagome Structures 认领 引用
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作者 Shiyu Duan Zhenzhen Liu +4 位作者 Jianmin Zhang Jianbing Chen Baihong Liu Xiaobo Feng Hai Yang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期166-171,共6页
A significant paradigm shift in condensed matter physics has been precipitated by the emergence of higher-order topological insulators.We design a higher-order Kagome acoustic crystal incorporating balanced gain and l... A significant paradigm shift in condensed matter physics has been precipitated by the emergence of higher-order topological insulators.We design a higher-order Kagome acoustic crystal incorporating balanced gain and loss factors,thereby emulating non-Hermitian characteristics.This system exhibits the coexistence of two distinct corner states localized at the same angular positions within a supercell composed of two triangular domains with different topological phases,and the radius of one cylinder can control the frequency of the corner state.By constructing a polygonal structure formed by the expanded and shrunk lattices with distinct topological phases,we theoretically demonstrate that acoustic waves of various frequencies can be selectively trapped at a series of specific angles of this polygon.Moreover,these corner states are locked to the corner order,corresponding to the clockwise or anticlockwise orientation of the polygon,which leads to the higher-order topological rainbow.This work opens a new avenue for guiding and trapping multi-frequency acoustic energy,with potential applications in advanced acoustic devices. 展开更多
关键词 coexistence two distinct corner states corner states topological phases condensed matter physics balanced gain loss factorsthereby kagome acoustic crystal higher order topological insulators non hermitian acoustic kagome structures
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Theoretical modelling for effects of arbitrary surface catalysis on peak heat flux in laminar compression corner flows 认领 引用
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作者 Guangjing Ju Jingwei Xu Lin Bao 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期564-575,共12页
Theoretical analysis and numerical simulations using computational fluid dynamics(CFD)were conducted to investigate hypersonic laminar flow over a compression corner,focusing on the effects of arbitrary surface cataly... Theoretical analysis and numerical simulations using computational fluid dynamics(CFD)were conducted to investigate hypersonic laminar flow over a compression corner,focusing on the effects of arbitrary surface catalysis on peak surface heat transfer.Four groups of inflow conditions were considered,varying in Mach number(8-12),unit Reynolds number(2×105-8×105m-1),degree of dissociation(0.05-0.15),and ramp angle(20°-28°).The results indicate that while wall catalysis has a negligible effect on the flow structure,it significantly influences the peak surface heat transfer near the reattachment region,even for finite-rate catalytic walls.A predictive formula is proposed for the non-dimensional catalytic heating,considering finite-rate catalytic walls.CFD results show that the peak heat flux increases as the catalytic coefficient increases due to enhanced surface recombination of atoms,and the effectiveness of the formula is further verified by oxygen inflow.Finally,the catalytic heating ratio at the location of peak surface heat transfer is evaluated by the formula using catalytic coefficients of real materials.It is shown that the catalytic heat flux ratio may increase by approximately 50%from oxygen inflow to nitrogen inflow for copper under the same nominal freestream. 展开更多
关键词 Finite-rate catalytic wall Compression corner Peak heat flux Theoretical modelling
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Tunable Topological Superconductivity by Fully Compensated Ferrimagnets 认领 引用
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作者 Yu-Xuan Li Yicheng Liu Cheng-Cheng Liu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第7期74-78,79-97,共5页
We propose a platform based on a fully compensated ferrimagnet(fFiM)for realizing and controlling topological superconductivity with Majorana bound states across multiple dimensions.Through symmetry analysis and micro... We propose a platform based on a fully compensated ferrimagnet(fFiM)for realizing and controlling topological superconductivity with Majorana bound states across multiple dimensions.Through symmetry analysis and microscopic modeling,we demonstrate that fFIM-based heterostructures host(i)Majorana zero modes localized at the ends of one-dimensional nanowires,(ii)chiral Majorana edge states along two-dimensional boundaries,and(iii)tunable Majorana corner modes in higher-order topological phases.The unique properties of fFiMs enable the topological superconductivity to be electrically and magnetically tunable,i.e.,the intrinsic staggered potential can drive topological superconductivity phase transitions by an electric field,and Néel vector orientation can control the spatial distribution of Majorana modes,without the need for an external magnetic field.Moreover,our calculations show that these fFiM-based topological phases are robust against weak onsite disorder,confirming their relevance for realistic heterostructures.Crucially,the absence of net magnetization in fFIM-based heterostructures preserves superconductivity,circumventing the usual trade-off between tunability and superconducting coherence in magnetized systems.By leveraging zero net magnetization and electric-field-tunable spin-band splitting intrinsic to fFIMs,the proposed heterostructures provide a more practical and robust route to tunable topological superconductivity. 展开更多
关键词 zero modes fully compensated ferrimagnet ffim tunable topological superconductivity majorana bound states majorana edge states symmetry analysis microscopic modelingwe majorana corner modes
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WPT-FOD Method Based on Channel Differential Response and Dynamic Threshold 认领 引用
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作者 XU Xihong LIU Fuqian XIA Chenyang 《南方能源建设》 2026年第1期127-138,共12页
[Objective]As wireless power transfer(WPT)technology is increasingly deployed in scenarios such as electric vehicles,metallic foreign objects in the WPT area may cause local overheating and energy loss.Existing method... [Objective]As wireless power transfer(WPT)technology is increasingly deployed in scenarios such as electric vehicles,metallic foreign objects in the WPT area may cause local overheating and energy loss.Existing methods still suffer from poor edge/corner sensitivity,misjudgment due to fixed thresholds,and limited ability to extract position information.This work proposes a wireless power transfer-foreign object detection(WPT-FOD)method based on channel differential response and a dynamic-threshold corner-enhancement strategy,aiming to improve detection sensitivity,localization accuracy,and robustness without altering the overall coil layout.[Method]A multi-channel detection coil array is designed,and the self-inductance disturbance response of each channel coil is modeled.A channel-difference mapping mechanism is introduced to build a 2-D sensitivity matrix to characterize spatial position correlation.A corner-enhancement algorithm is developed to weight and amplify the collaborative response of adjacent channels,and a dynamic threshold adjustment mechanism is integrated to adapt to varying interference levels.Validation is carried out on a self-built 64-channel FOD platform by moving a typical metallic foreign object across central,edge,and corner regions,and by conducting comparative tests under different interference intensities.[Result]When a typical metallic foreign object moves to corner regions,the self-inductance disturbance of the detection coil increases from less than 0.02μH to more than 0.06μH,significantly enhancing the discrimination capability at corners.Under varying interference strengths,the dynamic threshold mechanism reduces the number of false positives from 13 to 2,demonstrating good environmental adaptability and stability.[Conclusion]By combining channel differential response,corner enhancement,and dynamic thresholding,the proposed WPT-FOD effectively mitigates edge/corner blind spots and fixed-threshold misjudgment,while providing localization capability and robustness.It markedly improves the accuracy of metallic foreign object detection in WPT systems and offers a feasible path and method reference for the safe application and engineering deployment of WPT systems. 展开更多
关键词 electric vehicles wireless charging foreign object detection channel differential response corner enhancement algorithm
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Robust Tube-MPC Trajectory Tracking Control for Four-Wheel Independent Steering Vehicles on Intermittent Snowy and Icy Roads 认领 引用 被引量：1
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作者 Xiaochuan Zhou Ruiqi Liu +3 位作者 Jinyu Zhou Ziyu Zhang Chunyan Wang Wanzhong Zhao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2025年第5期64-82,共19页
Four-Wheel Independent Steering(4WIS)Vehicles can independently control the angle of each wheel,demonstrating superior trajectory tracking performance under normal conditions.However,on intermittent icy and snowy road... Four-Wheel Independent Steering(4WIS)Vehicles can independently control the angle of each wheel,demonstrating superior trajectory tracking performance under normal conditions.However,on intermittent icy and snowy roads,the presence of time-varying adhesion coefficients,time-varying cornering stiffness,and the irregularities due to ice and snow accumulation introduce multiple uncertainties into the steering system,significantly degrading the trajectory tracking performance of 4WIS vehicles.In response,this paper proposes a robust Tube Model Predictive Control(Tube-MPC)trajectory tracking control method for 4WIS.In this method,a Bi-directional Long Short-Term Memory neural network is established for online estimation of tire cornering stiffness under different road adhesion coefficients,providing accurate estimation of time-varying cornering stiffness for each wheel to mitigate the uncertainties of time-varying adhesion coefficients and cornering stiffness.Additionally,considering the road irregularities caused by snow accumulation on intermittent icy and snowy roads,a trajectory tracking controller that integrates Tube-MPC and robust Sliding Mode Control is proposed.The nominal MPC model,developed from the estimated tire cornering stiffness,utilizes the sliding surface and the optimal auxiliary control unit law for the tube is derived from the reaching law in Tube-MPC,aiming to minimize the trajectory tracking error while enhancing the controller’s robustness against road uncertainties.The experiments show that the proposed method outperforms the Tube-MPC algorithm in terms of trajectory accuracy and robustness.This method demonstrates excellent trajectory tracking accuracy under intermittent icy and snowy road conditions,and it lays a theoretical foundation for future studies on vehicle stability and trajectory tracking under such road conditions. 展开更多
关键词 Intermittent icy and snowy roads Vehicle trajectory tracking Robust Tube-MPC Cornering stiffness estimation
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AI-Driven Inverse Design of Materials:Past,Present,and Future 认领 引用 被引量：3
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作者 Xiao-Qi Han Xin-De Wang +5 位作者 Meng-Yuan Xu Zhen Feng Bo-Wen Yao Peng-Jie Guo Ze-Feng Gao Zhong-Yi Lu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2025年第2期135-174,共40页
The discovery of advanced materials is a cornerstone of human technological development and progress.The structures of materials and their corresponding properties are essentially the result of a complex interplay of ... The discovery of advanced materials is a cornerstone of human technological development and progress.The structures of materials and their corresponding properties are essentially the result of a complex interplay of multiple degrees of freedom such as lattice,charge,spin,symmetry,and topology.This poses significant challenges for the inverse design methods of materials.Humans have long explored new materials through numerous experiments and proposed corresponding theoretical systems to predict new material properties and structures.With the improvement of computational power,researchers have gradually developed various electronic-structure calculation methods,such as the density functional theory and high-throughput computational methods.Recently,the rapid development of artificial intelligence(AI)technology in computer science has enabled the effective characterization of the implicit association between material properties and structures,thus forming an efficient paradigm for the inverse design of functional materials.Significant progress has been achieved in the inverse design of materials based on generative and discriminative models,attracting widespread interest from researchers.Considering this rapid technological progress,in this survey,we examine the latest advancements in AI-driven inverse design of materials by introducing the background,key findings,and mainstream technological development routes.In addition,we summarize the remaining challenges for future directions.This survey provides the latest overview of AI-driven inverse design of materials,which can serve as a useful resource for researchers. 展开更多
关键词 materials inverse corners
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A State-of-the-Art Review on the Revolution of Structure and Control of Vehicle Chassis System:from Tradition to Distributed Chassis System 认领 引用 被引量：1
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作者 Ning Zhang Zihong Li +4 位作者 Cheng Wang Jinxiang Wang Weichao Zhuang Wenpeng Wei Guodong Yin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2025年第5期1-22,共22页
With the advent of in-wheel motors and corner modules,the structure of vehicle chassis subsystems has shifted from traditionally centralized to distributed.This review focuses on the distributed chassis system(DCS)equ... With the advent of in-wheel motors and corner modules,the structure of vehicle chassis subsystems has shifted from traditionally centralized to distributed.This review focuses on the distributed chassis system(DCS)equipped with corner modules.It first provides a comprehensive summary and description of the revolution of the structure and control methods of vehicle chassis systems(including driving,braking,suspension,and steering systems).Given that DCS integrates various chassis subsystems,this review moves beyond individual subsystem analysis and delves into the coordination of these subsystems at the vehicle level.It provides a detailed summary of the methods and architectures used for integrated coordination and control,ensuring that multiple subsystems can function seamlessly as an integrated whole.Finally,this review summarizes the latest distributed control architecture for DCS.It also examines current control theories in the fields of control and information technology for distributed systems,such as multi-agent systems and cyber-physical systems.Based on these two control approaches,a multi-domain cooperative control framework for DCS is proposed. 展开更多
关键词 Distributed chassis system Corner module Coordinated control Multi-domain cooperative control
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Research on Hierarchical Motion Control of Corner Module Configuration Intelligent Electric Vehicle 认领 引用 被引量：1
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作者 Yongjun Yan Chenshuo Zhang +5 位作者 Pengyu Xue Hongliang Wang Dawei Pi Wenfu Xue Ye-Hwa Chen Xianhui Wang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2025年第1期396-410,共15页
The intelligent vehicle corner module system,which integrates four-wheel independent drive,independent steering,independent braking and active suspension,can accurately and efficiently perform vehicle driving tasks an... The intelligent vehicle corner module system,which integrates four-wheel independent drive,independent steering,independent braking and active suspension,can accurately and efficiently perform vehicle driving tasks and is the best carrier of intelligent vehicles.Nevertheless,too many angleorque control inputs make control difficult and non-real-time.In this paper,a hierarchical real-time motion control framework for corner module configuration intelligent electric vehicles is proposed.In the trajectory planning module,an improved driving risk field is designed to describe the surrounding environment’s driving risk.Combined with the kinematic vehicle-road model,model predictive control(MPC)method,spline curve method,the local reference trajectory of safety,comfort and smoothness is planned in real time.The optimal steering angle is determined using MPC method in path tracking module.In the motion control module,a feedforward-feedback controller assigns the optimal steering angle to the frontear axles,and an angle allocation controller distributes the target angles of the frontear axles to four steered wheels.Finally,the PreScan-Simulink-CarSim joint simulation environment is established for conducting the human-in-the-loop emergency obstacle avoidance experiment.It took only 0.005 s for the hierarchical motion control system to determine its average solution time.This proves the effectiveness of the hierarchical motion control system. 展开更多
关键词 Corner module Four-wheel steering Hierarchical motion control Model predictive control Driving risk field
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Micromechanical analysis of particle corner effect on bearing and deformation behaviors of coral sand slope foundation under a strip footing 认领 引用
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作者 PENG Yu LUO Zhao-gang +2 位作者 HE Shao-heng QU Li-ming DING Xuan-ming 《Journal of Central South University》 SCIE EI CAS CSCD 2025年第2期624-642,共19页
To understand the specific behaviors of coastal coral sand slope foundations,discrete element method(DEM)was employed to examine the effect of breakable particle corners on the performance of coral sand slope foundati... To understand the specific behaviors of coastal coral sand slope foundations,discrete element method(DEM)was employed to examine the effect of breakable particle corners on the performance of coral sand slope foundations under a strip footing,from macro to micro scales.The results demonstrate that the bearing characteristics of coral sand slope foundations can be successfully modeled by utilizing breakable corner particles in simulations.The dual effects of interlocking and breakage of corners well explained the specific shallower load transmission and narrower shear stress zones in breakable corner particle slopes.Additionally,the study revealed the significant influence of breakable corners on soil behaviors on slopes.Furthermore,progressive corner breakage within slip bands was successfully identified as the underling mechanism in determining the unique bearing characteristics and the distinct failure patterns of breakable corner particle slopes.This study provides a new perspective to clarify the behaviors of slope foundations composed of breakable corner particle materials. 展开更多
关键词 micromechanical analysis coral sand slope foundation particle corner breakage corner interlock
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An improved criterion for predicting corner stall in axial compressors with varying dihedral angles 认领 引用
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作者 Huiling ZHU Ling ZHOU +2 位作者 Jiabin LI Shuxian SUN Lucheng JI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第11期37-50,共14页
Currently,the design of advanced compressor blades has reached the full ThreeDimensional(3D)modeling stage.When analyzing the reasons for the failure of popular corner stall prediction criteria for axial compressors t... Currently,the design of advanced compressor blades has reached the full ThreeDimensional(3D)modeling stage.When analyzing the reasons for the failure of popular corner stall prediction criteria for axial compressors to predict the corner flow state in modern compressor3D blades with end-bend and composite bend-sweep characteristics,it is believed that,in addition to the dihedral angle factor in the corner,the variation of the dihedral angle along the flow path is an important factor that has not been considered to date.In light of this,this study first uses the characteristic effects of the diffuser on the deceleration and pressure increase in airflow to design a series of physical models of varying dihedral angle diffusers that are equivalent to compressors.Based on these models,a quantization parameter is established to characterize the development speed of the intersection of boundary layers at the corner under varying dihedral angle and adverse pressure gradient conditions.After combining this with the effects of secondary flow,a Modified diffusion factor DJ(MDJ)is developed to describe the development of corner flow from the leading edge of the blade to its trailing edge under varying dihedral angle conditions.Finally,based on a compressor cascade database,an improved criterion for predicting corner stall in axial compressors using the MDJ diffusion factor is proposed.The validation results,based on extensive experimental data of compressor blades,reveal that this improved criterion can significantly enhance the accuracy of corner stall predictions in the 3D blades of modern compressors compared to currently used prediction criteria,by taking into account the effects of variations in the dihedral angle. 展开更多
关键词 Axial compressor Corner intersection boundary layer Corner stall Diffuser Prediction criterion Varying dihedral angle
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Experimental and numerical investigation of passive flow control using L-shaped endwall groove in an axial flow compressor stage 认领 引用
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作者 Ziyun ZHANG Yanhui WU +2 位作者 Dong WANG Bo WANG Lingju HUANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第12期16-31,共16页
To investigate the control effect and flow mechanism of the L-shaped endwall groove on corner separation in the real compressor stage,a single stage axial flow compressor is selected as the research object and the L-s... To investigate the control effect and flow mechanism of the L-shaped endwall groove on corner separation in the real compressor stage,a single stage axial flow compressor is selected as the research object and the L-shaped grooves are introduced on the stator casing side.First,the experimental measurement is conducted on the optimal L-shaped groove obtained through a full factorial experimental design,and the results demonstrate that the optimal groove has a great control over the endwall flow.Moreover,the peak efficiency is improved by 0.9%and the stall margin is increased by 4.46%.Then,the flow field visualization of numerical results and analysis of variance method are employed to analyze the control mechanism and parameter control law of the L-shaped groove.It is found that the L-shaped groove can guide the skewed inlet endwall boundary layer towards the streamwise direction due to its confinement effect,thereby delaying the onset of corner separation and reducing the size of ring vortex.As a result,the aerodynamic performance of the compressor is enhanced.Furthermore,the groove depth and groove width play a significant role in controlling endwall flow among the three L-shaped groove design parameters.The larger groove depth and smaller groove width enhance the capability of the streamwise groove to constrain the endwall boundary layer,leading to a greater reduction in endwall loss. 展开更多
关键词 Analysis of variance Compressor stage Corner separation L-shaped groove Ring vortex
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An adjustment-free laser resonator based on micron-scale corner cube array 认领 引用
20
作者 Pengyuan Chang Xinrong Huang +4 位作者 Caolei Fu Aiping Liu Duo Pan Zhiyang Wang Jingbiao Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第3期382-387,共6页
The topic of improving the mechanical stability of external cavity diode lasers(ECDLs)has recently attracted widespread attention and interest.The use of corner-cube-array(CCA)-based resonators provides a potential so... The topic of improving the mechanical stability of external cavity diode lasers(ECDLs)has recently attracted widespread attention and interest.The use of corner-cube-array(CCA)-based resonators provides a potential solution for this purpose,although continuous oscillation at super large incident angle remains challenging.In this work,we employ the CCA resonator to generate continuous oscillation within±20°angular misalignment of cavity mirror in experiment.On the basis of retroreflection theory,the retroreflectivity of a CCA is analyzed by using optical simulation software.Notably,the experiment verifies the advantage of using a CCA over a plane mirror in laser resonator,thereby providing a promising approach for ECDLs.The threshold characteristic curves measured at different incident angles in the experiment verify that the CCA possesses an obvious anti-angle misalignment performance.This research introduces an alternative solution of using CCA resonator instead of parallel plane cavity,thereby realizing an adjustment-free ECDL with enhanced mechanical stability. 展开更多
关键词 laser resonant cavity corner cube array external cavity diode laser threshold curve
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