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Load Dependent Series-Parallel Systems with Common Bus Performance Sharing Mechanism 认领 引用 被引量：1
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作者 肖辉 彭锐 《Journal of Donghua University(English Edition)》 EI CAS 2014年第6期770-773,共4页
A series-parallel system was proposed with common bus performance sharing in which the performance and failure rate of the element depended on the load it was carrying. In such a system,the surplus performance of a su... A series-parallel system was proposed with common bus performance sharing in which the performance and failure rate of the element depended on the load it was carrying. In such a system,the surplus performance of a sub-system can be transmitted to other deficient sub-systems. The transmission capacity of the common bus performance sharing mechanism is a random variable. Effects of load on element performance and failure rate were considered in this paper. A reliability evaluation algorithm based on the universal generating function technique was suggested. Numerical experiments were conducted to illustrate the algorithm. 展开更多
关键词 multi-state reliability series-parallel system load dependent failure rate common bus performance sharing
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Reliability of a Large Series-parallel System in Variable Operating Conditions 认领 引用
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作者 Joanna Soszynska 《International Journal of Automation and computing》 2006年第2期199-206,共8页
In this paper, a semi-Markov model of system operation processes is proposed and its selected parameters are determined. A series-parallel multi-state system is considered, and its reliability and risk characteristics... In this paper, a semi-Markov model of system operation processes is proposed and its selected parameters are determined. A series-parallel multi-state system is considered, and its reliability and risk characteristics found. Subsequently, a joint model of system operation process and system multi-state reliability and risk is constructed. Moreover, the asymptotic approach to reliability and risk evaluation of a multi-state series-parallel system in its operation process is applied to a port grain transportation system. 展开更多
关键词 Series-parallel system limit reliability function semi-Markov processes.
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Reliability Optimization of Entropy Based Series-Parallel System Using Global Criterion Method 认领 引用
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作者 G. S. MAHAPATRA 《Intelligent Information Management》 2009年第3期145-149,共5页
In this paper, we have considered a series-parallel system to find out optimum system reliability with an additional entropy objective function. Maximum system reliability of series-parallel system is depending on pro... In this paper, we have considered a series-parallel system to find out optimum system reliability with an additional entropy objective function. Maximum system reliability of series-parallel system is depending on proper allocation of redundancy component in different stage. The goal of entropy based reliability redundancy allocation problem is to find optimal number of redundancy component in each stage such a manner that maximize the system reliability subject to available total system cost. Global criterion method is used to analyze entropy based reliability optimization problem with different weight function of objective functions. Numerical examples have been provided to illustrate the model. 展开更多
关键词 reliability series-parallel system redundancy entropy global criterion method
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Optimal Redundancy Allocation in Hierarchical Series-Parallel Systems Using Mixed Integer Programming 认领 引用
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作者 Mohsen Ziaee 《Applied Mathematics》 2013年第1期79-83,共5页
Reliability optimization plays an important role in design, operation and management of the industrial systems. System reliability can be easily enhanced by improving the reliability of unreliable components and/or by... Reliability optimization plays an important role in design, operation and management of the industrial systems. System reliability can be easily enhanced by improving the reliability of unreliable components and/or by using redundant configuration with subsystems/components in parallel. Redundancy Allocation Problem (RAP) was studied in this research. A mixed integer programming model was proposed to solve the problem, which considers simultaneously two objectives under several resource constraints. The model is only for the hierarchical series-parallel systems in which the elements of any subset of subsystems or components are connected in series or parallel and constitute a larger subsystem or total system. At the end of the study, the performance of the proposed approach was evaluated by a numerical example. 展开更多
关键词 Hierarchical Series-Parallel System Optimal Redundancy Allocation Mixed Integer Programming Formulation Reliability Optimization
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An intra-string distributed and inter-string decentralized control method for hybrid series-parallel microgrids 认领 引用
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作者 Xiaochao Hou Jiatong He +3 位作者 Changgeng Li Zexiong Wei Kai Sun Yunwei Li 《iEnergy》 EI 2026年第1期30-42,共13页
The hybrid series-parallel microgrid attracts more attention by combining the advantages of both the series-stacked voltage and parallel-expanded capacity.Low-voltage distributed generations(DGs)are connected in serie... The hybrid series-parallel microgrid attracts more attention by combining the advantages of both the series-stacked voltage and parallel-expanded capacity.Low-voltage distributed generations(DGs)are connected in series to form the intra-string,and then multiple strings are interconnected in parallel.For the existing control strategies,both intra-string and inter-string depend on the centralized or distributed control with high communication reliance.It has limited scalability and redundancy under abnormal conditions.Alternatively,in this study,an intra-string distributed and inter-string decentralized control framework is proposed.Within the string,a few DGs close to the AC bus are the leaders to get the string power information and the rest DGs are the followers to acquire the synchronization information through the droop-based distributed consistency.Specifically,the output of the entire string has the active power−angular frequency(ω-P)droop characteristic,and the decentralized control among strings can be autonomously guaranteed.Moreover,the secondary control is designed to realize multi-mode objectives,including on/off-grid mode switching,grid-connected power interactive management,and off-grid voltage quality regulation.As a result,the proposed method has the ability of plug-and-play capabilities,single-point failure redundancy,and seamless mode-switching.Experimental results are provided to verify the effectiveness of the proposed practical solution. 展开更多
关键词 Hybrid series-parallel microgrid Distributed control Decentralized control Power inverter
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Thermal runaway in lithium-ion battery systems with hybrid electrical connections:Propagation induced by spontaneous overcharge without heat transfer 认领 引用
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作者 Zhizuan Zhou Maoyu Li +2 位作者 Lun Li Ping Zhang Lizhong Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期832-846,I0020,共15页
Lithium-ion batteries(LIBs)are inevitably connected in parallel and in series to satisfy the high-voltage and high-power requirements of practical applications.However,most efforts focus on thermal runaway(TR)in the b... Lithium-ion batteries(LIBs)are inevitably connected in parallel and in series to satisfy the high-voltage and high-power requirements of practical applications.However,most efforts focus on thermal runaway(TR)in the batteries adopting open-circuit or single electrical connection configurations,neglecting the potential influence of hybrid electrical connections.This oversight contributes to the discrepancies between TR disasters observed at the experimental scale and those occurring in real-world scenarios.To address the issue,this study systematically investigates the TR characteristics of battery modules with different hybrid connections(open circuit,1S3P,2S3P,3S3P,and 4S3P)and elucidates the mechanisms of TR propagation in the absence of heat transfer.The results show that the initial TR in 1S3P and 2S3P battery modules can be advanced to the opening of safety valve owing to the transferred electric energy between parallel submodules.In contrast to conventional thoughts,without the involvement of heat transfer,TR propagation may still occur in battery systems with series-parallel connections.Although the heat transfer is completely blocked,the adjacent battery connected in series with the TR battery in 2S3P module still suffers from TR owing to the spontaneous overcharge,and batteries in 3S3P and 4S3P battery modules all experience severe side reactions accompanied by significant expansions.Moreover,spontaneous overcharge is driven by voltage imbalances between parallel submodules in series-parallel battery systems,driving charge transfer that results in overcharging of adjacent batteries.The severity of this effect is governed by the voltage increment between neighboring batteries,while its influence weakens as the number of series-connected batteries increases.Overall,this study reveals an additional pathway,electricity transfer,that can also result in TR disasters in practical battery systems,providing novel insights for TR disaster mechanisms and guides for safe battery system design. 展开更多
关键词 Lithium-ion battery safety Thermal runaway Series-parallel connection Spontaneous overcharge Thermal runaway propagation
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Series-parallel Hybrid Vehicle Control Strategy Design and Optimization Using Real-valued Genetic Algorithm 认领 引用 被引量：16
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作者 XIONG Weiwei YIN Chengliang +1 位作者 ZHANG Yong ZHANG Jianlong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS 2009年第6期862-868,共7页
Despite the series-parallel hybrid electric vehicle inherits the performance advantages from both series and parallel hybrid electric vehicle,few researches about the series-parallel hybrid electric vehicle have been ... Despite the series-parallel hybrid electric vehicle inherits the performance advantages from both series and parallel hybrid electric vehicle,few researches about the series-parallel hybrid electric vehicle have been revealed because of its complex co nstruction and control strategy.In this paper,a series-parallel hybrid electric bus as well as its control strategy is revealed,and a control parameter optimization approach using the real-valued genetic algorithm is proposed.The optimization objective is to minimize the fuel consumption while sustain the battery state of charge,a tangent penalty function of state of charge(SOC)is embodied in the objective function to recast this multi-objective nonlinear optimization problem as a single linear optimization problem.For this strategy,the vehicle operating mode is switched based on the vehicle speed,and an"optimal line"typed strategy is designed for the parallel control.The optimization parameters include the speed threshold for mode switching,the highest state of charge allowed,the lowest state of charge allowed and the scale factor of the engine optimal torque to the engine maximum torque at a rotational speed.They are optimized through numerical experiments based on real-value genes,arithmetic crossover and mutation operators.The hybrid bus has been evaluated at the Chinese Transit Bus City Driving Cycle via road test,in which a control area network-based monitor system was used to trace the driving schedule.The test result shows that this approach is feasible for the control parameter optimization.This approach can be applied to not only the novel construction presented in this paper,but also other types of hybrid electric vehicles. 展开更多
关键词 series-parallel hybrid electric vehicle control strategy design optimization real-valued genetic algorithm
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Configuration design,energy management and experimental validation of a novel series-parallel hybrid electric transit bus 认领 引用 被引量：4
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作者 Wei-wei XIONG Yong ZHANG Cheng-liang YIN 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2009年第9期1269-1276,共8页
This paper aims to present the configuration design approach and the energy management strategy （EMS） of a series-parallel hybrid electric transit bus （SPHEB） jointly developed by Shanghai Automotive Industry Co. ... This paper aims to present the configuration design approach and the energy management strategy （EMS） of a series-parallel hybrid electric transit bus （SPHEB） jointly developed by Shanghai Automotive Industry Co. Ltd. （SAIC） and Shanghai Jiao Tong University （SJTU）, China. A major feature of this SPHEB is that a novel manual transmission is designed to switch the powertrain configuration between series and parallel types. To reduce the fuel consumption as well as sustain the battery state of charge, an EMS including seven energy flow modes is designed and applied to this SPHEB. Governed by this EMS, the engine is maintained to operate in high efficiency regions. The experimental test carded on the transit bus city driving cycle is described and analyzed. The experimental results demonstrate the technical feasibility and fuel economy of this approach. 展开更多
关键词 Series-parallel hybrid bus Powertrain configuration Energy management Experimental validation
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Operation control strategy of series-parallel hydraulic hybrid vehicle 认领 引用 被引量：1
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作者 赵立军 Ge Zhuhong +1 位作者 Luo Manning Liu Xinhui 《High Technology Letters》 EI CAS 2014年第1期97-102,共6页
A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which i... A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy. 展开更多
关键词 series-parallel configuration hydraulic hybrid vehicles vehicles for public trans-port operation control strategy regenerative brake
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Existence and Uniqueness of the Dynamic Solution of a Series-Parallel Repairable System Consisting of Three-Unit with Multiple Vacations of a Repairman 认领 引用 被引量：2
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作者 Abdukerim Haji Tursunjan Keyim Bilikiz Yunus 《Journal of Applied Mathematics and Physics》 2016年第8期1585-1591,共7页
We investigate a series-parallel repairable system consisting of three-unit with multiple vacations of a repairman. By using C0-semigroup theory of linear operators in the functional analysis, we prove that the system... We investigate a series-parallel repairable system consisting of three-unit with multiple vacations of a repairman. By using C0-semigroup theory of linear operators in the functional analysis, we prove that the system is well-posed and has a unique positive dynamic solution. 展开更多
关键词 Series-Parallel Repairable System C_0-Semigroup Dynamic Solution
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Availability Analysis of a Repairable Series-Parallel System with Redundant Dependency 认领 引用 被引量：2
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作者 HU Linmin YUE Dequan MA Zhanyou 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2020年第2期446-460,共15页
This paper investigates the steady-state availability of a repairable series-parallel system with redundant dependency.The different types of components and repairmen are taken into account,the failure rate of the ope... This paper investigates the steady-state availability of a repairable series-parallel system with redundant dependency.The different types of components and repairmen are taken into account,the failure rate of the operating component varies as the number of other failed components and the repair rate of the failed component is constant in each parallel redundant subsystem.To quantify the redundant dependency,a modified failure dependence function is introduced to determine the failure rate of the components in each subsystem.Markov theory and matrix analysis method are used to get the steady-state probability vector of each subsystem and the steady-state availability of the entire system.A numerical example is presented to illustrate the obtained results and to analyze the effect of redundant dependency class on the system availability. 展开更多
关键词 Availability probability redundant dependency repairable system series-parallel
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Design and Strategy of Series-Parallel Hybrid System Based on BSFC 认领 引用 被引量：2
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作者 Huien Gao Liang Chu +1 位作者 Jianhua Guo Dianbo Zhang 《Journal of Beijing Institute of Technology》 EI CAS 2018年第4期564-574,共11页
In this paper,a drive control strategy is developed based on the characteristics of series-parallel plug-in hybrid system.Energy management strategies in various modes are established with the basis on the minimum bra... In this paper,a drive control strategy is developed based on the characteristics of series-parallel plug-in hybrid system.Energy management strategies in various modes are established with the basis on the minimum brake specific fuel consumption(BSFC)curve of engine.The control strategy,which is based on rules and system efficiency,is adopted to determine the entry/exit mechanisms of various modes according to battery state of charge(SOC),required power and required speed.The vehicle test results verify that the proposed control strategy can improve vehicle economy efficiently and makes a good effect on engine control. 展开更多
关键词 series-parallel plug-in hybrid electric vehicle(PHEV) based on rules based on system efficiency
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Halin图和Series-Parallel图的星荫度 认领 引用 被引量：2
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作者 吴建良 贠军亮 张咏梅 《山东科技大学学报（自然科学版）》 CAS 2000年第4期22-24,共3页
证明了：(1)所有Halin图的星荫度为3，和(2)所有SeriesParallel图的星荫度小于等于3.
关键词 Halin图 Series-parallel图 星荫度 染色 星染色
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Series-Parallel图上最小权顶点覆盖3-路问题的有效算法 认领 引用
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作者 张文杰 涂建华 《北京化工大学学报（自然科学版）》 CAS CSCD 北大核心 2019年第1期124-128,共5页
研究了Series-Parallel图上的顶点覆盖3-路问题,利用动态规划思想,给出一个能在多项式时间内完成的有效算法,该算法的运行时间为O(|V|)。
关键词 Series-Parallel图 顶点覆盖k-路问题 有效算法 动态规划
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Series-parallel图的△-SP算法的实现 认领 引用
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作者 窦明晖 李玲青 黄竞伟 《计算机工程》 EI CAS 北大核心 2002年第3期92-93,共2页
讨论了图和它的二叉分解树,对图的△画法进行了详细的描述,给出了该算法的实现过程,并且对图的分解series-parallelS-P-SPS-P树建树算法进行了改进。最后,通过一个具体实例演示了该画法的结果。
关键词 Series-parallel图 二叉分解树 Δ-SP画法 Δ-SP算法 数据结构
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Asymptotic Stability of a Series-Parallel Repairable System Consisting of Three-Unit with Multiple Vacations of a Repairman 认领 引用
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作者 Tursunjan Keyim Abdukerim Haji 《Journal of Applied Mathematics and Physics》 2017年第1期185-193,共9页
We study a series-parallel repairable system consisting of three units with multiple vacations of a repairman. We first show that all points on the imaginary axis except zero belong to the resolvent set of the operato... We study a series-parallel repairable system consisting of three units with multiple vacations of a repairman. We first show that all points on the imaginary axis except zero belong to the resolvent set of the operator and zero is an eigenvalue of the operator, and then we prove that the semigroup generated by the operator is irreducible. By combining these results with our previous result we deduce that the dynamic solution of the system converges strongly to its steady-state solution. Thus we obtain asymptotic stability of the dynamic solution of the system. 展开更多
关键词 Series-Parallel Repairable System C0-Semigroup Irreducibility Asymptotic Stability
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Series-Parallel图的全选择数与全色数 认领 引用
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作者 李涛 《河南大学学报（自然科学版）》 CAS 2001年第4期37-40,共4页
对 2_连通Series_Parallel图G ,证明了当Δ(G) 4时 ,其全选择数等于Δ(G) +1;在Δ(G) 3时 ,其全色数等于Δ(G) +1;对Δ(G)≠ 3时 ,其边选择数等于其边色数 (即列表染色猜想 ) .由于外平面图是特殊的Series_Parallel图 。
关键词 Series-Parallel图 平面图 全染色 全选择数 全色数
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Design and Experimental Validation of a Hybrid-Driven 6-PUS Parallel Manipulator for High-Speed,Heavy-Load Marine Nuclear Equipment Sway Testing 认领 引用
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作者 Changlei Shao Kun Zhang +6 位作者 Xiaoming He Yan Hu Chengwu Li Zhijun Chen Jingdong Hu Wei Shi Feng Gao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2025年第4期30-48,共19页
Current sway test platforms for marine nuclear equipment face challenges in meeting the GJB 150.23A requirements.This is primarily because of the performance limitations of conventional actuators under extreme marine ... Current sway test platforms for marine nuclear equipment face challenges in meeting the GJB 150.23A requirements.This is primarily because of the performance limitations of conventional actuators under extreme marine conditions.This study aimed to overcome these constraints using an innovative parallel mechanism design.We developed a novel 6-PUS parallel platform featuring six kinematic chains with hybrid series-parallel actuators.Each chain combines(1)force-speed adaptive transmission,(2)redundant motor-driven dual-screw actuation,and(3)passive load-balancing mechanisms.Comprehensive kinematic/dynamic modeling and experimental validation were conducted.Tests demonstrated the capability of the platform to achieve cyclic speeds of±45°/7 s and±30°/3 s while supporting 10-ton loads.Successful sway tests on nuclear components(reactor pressurizer and control rod drive mechanism)confirmed the operational reliability.This work presented three key innovations:(1)a new parallel-platform architecture that overcomes the limitations of conventional actuators;(2)integrated hybrid actuation with adaptive transmission;and(3)high-speed,heavy-load performance that meets stringent marine testing standards.This solution significantly advances nuclear equipment qualification testing technology. 展开更多
关键词 6-PUS parallel platform Hybrid series-parallel actuator High-speed Heavy-load Marine nuclear equipment testing
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A Neural Network Method for Reliability Optimizations of Complex Systems 认领 引用
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作者 PAN Zhongliang CHEN Ling ZHANG Guangzhao 《Wuhan University Journal of Natural Sciences》 CAS 2007年第1期139-142,共4页
The main task of system reliability design is to find the best layout of components to maximize reliability or to minimize cost. A reliability optimization approach using neural networks to identify the choice of comp... The main task of system reliability design is to find the best layout of components to maximize reliability or to minimize cost. A reliability optimization approach using neural networks to identify the choice of components in series-parallel systems with multiple constraints is presented in this paper. The McCullochPittes neural network model is used in this approach. The design methods of the neural network construction and its energy function are described in detail. The optimal solutions of the reliability problem are obtained by minimizing the energy function of the neural networks. Simulation results show the reliability optimization approach using neural networks can find the optimal or near-optimal solutions for most of the problems in a relatively short time, it is a useful alternative for system reliability design of complex systems. 展开更多
关键词 series-parallel systems system reliability optimization neural networks
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Theoretical prediction for effective properties and progressive failure of textile composites:a generalized multi-scale approach 认领 引用 被引量：11
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作者 Haoyuan Dang Peng Liu +4 位作者 Yinxiao Zhang Zhenqiang Zhao Liyong Tong Chao Zhang Yulong Li 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2021年第8期1222-1244,I0001,共23页
A generalized analytical model is developed to predict progressive failure behavior of several types of textile composites,including plain weave composites,twill weave composites,two-dimensional tri-axially braided co... A generalized analytical model is developed to predict progressive failure behavior of several types of textile composites,including plain weave composites,twill weave composites,two-dimensional tri-axially braided composites and warpreinforced 2.5-dimensional braided composites.In this model,the unit cell(UC)of composite is firstly identified and reconstructed into a refined lamina structure with multiple equivalent lamina elements(ELEs)based on apt geometrical approximation and assumptions.Secondly,two-way coupled stress-strain responses within the UC(macro-scale)and ELE(meso-scale)are established through a universal series-parallel model(SPM).Finally,a progressive damage model,which consists of damage initiation criteria and a stiffness evolution strategy,is employed to predict damage behavior of the ELE.The analytical results including mechanical properties and progressive failure process are validated against the existing numerical and experimental ones in literature.The validated analytical model is then used to study the effects of global fiber volume fraction,braided angle,shear failure coefficient and selected failure criteria on stiffness,strength and failure process.The present results demonstrate the efficiency and generic capability of the present analytical model for predicting the mechanical responses of a range of textile composites. 展开更多
关键词 Textile composites Analytical model Series-parallel model Damage mechanics Strength
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