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Nonlinear control of spacecraft formation flying with disturbance rejection and collision avoidance 认领 引用 被引量：3
1
作者 Qing Ni Yi-Yong Huang Xiao-Qian Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第1期250-259,共10页
A nonlinear controller for disturbances rejection and collision avoidance is proposed for spacecraft formation flying.The formation flying is described by a nonlinear model with the J2 perturbation and atmospheric dra... A nonlinear controller for disturbances rejection and collision avoidance is proposed for spacecraft formation flying.The formation flying is described by a nonlinear model with the J2 perturbation and atmospheric drag. Based on the theory of the state-dependent Riccati equation（SDRE）, a finite time nonlinear control law is developed for the nonlinear dynamics involved in formation flying. Then, a compensative internal mode（IM） control law is added to eliminate disturbances.These two control laws compose a finite time nonlinear tracking controller with disturbances rejection. Moreover, taking safety requirements into account, the repulsive control law is incorporated in the composite controller to perform collision avoidance manoeuvres. A numerical simulation is presented to demonstrate the effectiveness of the proposed method.Compared to the conventional control method, the proposed method provides better performance in the presence of the obstacles and external disturbances. 展开更多
关键词 nonlinear control disturbances rejection collision avoidance formation flying
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Nonlinear Control for Autonomous Underwater Glider Motion Based on Inverse System Method 认领 引用 被引量：12
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作者 杨海 马捷 《Journal of Shanghai Jiaotong university(Science)》 EI 2010年第6期713-718,共6页
Autonomous underwater gliders are highly effcient,buoyancy-driven,winged autonomous underwater vehicles. Their dynamics are multivariable nonlinear systems. In addition,the gliders are underactuated and diffcult to ma... Autonomous underwater gliders are highly effcient,buoyancy-driven,winged autonomous underwater vehicles. Their dynamics are multivariable nonlinear systems. In addition,the gliders are underactuated and diffcult to maneuver,and also dependent on their operational environment. To confront these problems and to design an effective controller,the inverse system method was used to decouple the original system into two independent single variable linear subsystems. The stability of the zero dynamics was analyzed,and an additional closed-loop controller for each linear subsystem was designed by sliding mode control method to form a type of composite controller. Simulation results demonstrate that the derived nonlinear controller is able to cope with the aforementioned problems simultaneously and satisfactorily. 展开更多
关键词 underwater glider nonlinear control inverse system method zero dynamics
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An improved nonlinear control strategy for deep space formation flying spacecraft 认领 引用 被引量：2
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作者 Peng Li Pingyuan Cui Hutao Cui 《Acta Mechanica Sinica》 SCIE EI CAS 2009年第6期847-856,共10页
This paper aims to provide further study on the nonlinear modeling and controller design of formation flying spacecraft in deep space missions.First,in the Sun-Earth system,the nonlinear formation dynamics for the cir... This paper aims to provide further study on the nonlinear modeling and controller design of formation flying spacecraft in deep space missions.First,in the Sun-Earth system,the nonlinear formation dynamics for the circular restricted three-body problem(CRTBP)and elliptic restricted three-body problem(ERTBP)are presented.Then,with the Floquet mode method,an impulsive controller is developed to keep the Chief on the desired Halo orbit.Finally,a nonlinear adaptive control scheme based on Nonzero set-point LQR and neural network is proposed to achieve high precision formation maneuver and keeping.The simulation results indicate that the proposed nonlinear control strategy is reasonable as it considers not only the orbit keeping of the Chief,but also the formation modeling inaccuracy.Moreover,the nonlinear adaptive control scheme is effective to improve the control accuracy of the formation keeping. 展开更多
关键词 Spacecraft formation flying Libration point Halo orbit Nonlinear control
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ABSOLUTE STABILITY OF TIME-VARYING NONLINEAR CONTROL SYSTEM 认领 引用 被引量：2
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作者 肖冬梅 邓宗琦 《Acta Mathematica Scientia》 SCIE 1999年第4期442-448,共7页
In this paper the authors study two classes of time-varying nonlinear control systems. A few sufficient conditions of absolute stability of these systems were obtained by means of classical analysis and the analogue o... In this paper the authors study two classes of time-varying nonlinear control systems. A few sufficient conditions of absolute stability of these systems were obtained by means of classical analysis and the analogue of the variation of constants formula of nonlinear systems. Moreover, they gave some sufficient conditions of absolute stability in Hurwitz angle for these systems. 展开更多
关键词 absolute stability two classes time-varying nonlinear control system
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A Survey of Recent Results in Quantized and Event-based Nonlinear Control 认领 引用 被引量：3
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作者 Zhong-Ping Jiang Teng-Fei Liu 《International Journal of Automation and computing》 CSCD 2015年第5期455-466,共12页
Constructive nonlinear control design has undergone rapid and significant progress over the last three decades. In this paper, a review of recent results in this important field is presented with a focus on interdisci... Constructive nonlinear control design has undergone rapid and significant progress over the last three decades. In this paper, a review of recent results in this important field is presented with a focus on interdisciplinary topics at the interface of control,computing and communications. In particular, it is shown that the nonlinear small-gain theory provides a unified framework for solving problems of quantized feedback stabilization and event-triggered control for nonlinear systems. Some open questions in quantized and networked nonlinear control systems are discussed. 展开更多
关键词 Nonlinear systems nonlinear control quantized cont
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Nonlinear Control of Beam Halo-Chaos in Accelerator-Driven Clean Nuclear Power System 认领 引用 被引量：2
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作者 FANGJin－Qing CHENGuan－Rong 《Communications in Theoretical Physics》 SCIE CAS 2002年第6期675-681,共7页
Beam halo-chaos in high-current accelerators has become a key concerned issue because it can cause excessive radioactivity from the accelerators therefore significantly limits their applications in industry,medicine,a... Beam halo-chaos in high-current accelerators has become a key concerned issue because it can cause excessive radioactivity from the accelerators therefore significantly limits their applications in industry,medicine,and national defense.Some general engineering methods for chaos control have been developed in recent years,but they generally are unsuccessful for beam halo-chaos suppression due to many technical constraints.Beam halo-chaos is essentially a spatiotemporal chaotic motion within a high power proton accelerator.In this paper,some efficient nonlinear control methods,including wavelet function feedback control as a special nonlinear control method,are proposed for controlling beam halo-chaos under five kinds of the initial proton beam distributions (i.e.,Kapchinsky-Vladimirsky,full Gauss,3-sigma Gauss,water-bag,and parabola distributions) respectively.Particles-in-cell simulations show that after control of beam halo-chaos,the beam halo strength factor is reduced to zero,and other statistical physical quantities of beam halo-chaos are doubly reduced.The methods we developed is very effective for suppression of proton beam halo-chaos in a periodic focusing channel of accelerator.Some potential application of the beam halo-chaos control in experiments is finally pointed out. 展开更多
关键词 proton beam halo-chaos nonlinear control wavelet-based feadback controller
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A new adaptive backstepping method for nonlinear control of turbine main steam valve 认领 引用 被引量：2
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作者 Jun FU Jun ZHAO 《控制理论与应用（英文版）》 2007年第1期17-22,共6页
A new approach for nonlinear adaptive control of turbine main steam valve is developed. In comparison with the existing controller based on ＂classical＂ adaptive backstepping, this method does not follow the classica... A new approach for nonlinear adaptive control of turbine main steam valve is developed. In comparison with the existing controller based on ＂classical＂ adaptive backstepping, this method does not follow the classical certaintyequivalence principle in the design of adaptive control law. We introduce this approach, for the first time, to power systems and present a novel parameter estimator and dynamic feedback controller for a single machine infinite bus （SMIB） system with steam valve control. This system contains unknown parameters such as reactance of transmission lines. Besides preserving useful nonlinearities and the real-time estimation of uncertain parameters, the proposed approach possesses better performances with respect to the response of the system and the speed of adaptation. The simulation results demonstrate that the proposed approach is better than the design based on ＂classical＂ adaptive backstepping in terms of properties of stability and parameter estimation, and recovers the performance of the ＂full-information＂ controller. Hence, the proposed method provides an alternative for engineers in applications. 展开更多
关键词 Nonlinear control Adaptive backstepping Steam valve control Power systems
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ON THE ASYMPTOTICAL BEHAVIOUR OF SOLUTIONS OF A CLASS OF NONLINEAR CONTROL SYSTEMS 认领 引用 被引量：3
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作者 滕志东 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第12期1405-1412,共8页
In this paper, the asymptotical behaviour solutions of a class of nonlinear control systems are studied. By establishing infinite integrals along solutions of the system and drawing support from a LaSalle's invari... In this paper, the asymptotical behaviour solutions of a class of nonlinear control systems are studied. By establishing infinite integrals along solutions of the system and drawing support from a LaSalle's invariance principle of integral form, criteria of dichotomy and global asymptotical behaviour of solutions are obtained. This work is an improvement and further extension of research methods and results of A. S. Aisagaliev. 展开更多
关键词 nonlinear control system integral along solution dichotomy global asymptotical behaviour invariance principle
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Modified Projective Synchronization of a New Hyperchaotic System via Nonlinear Control 认领 引用 被引量：1
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作者 LI Xin 《Communications in Theoretical Physics》 SCIE CAS 2009年第8期274-278,共5页
In this paper, a nonlinear control scheme of two identical hyperchaotic Chert systems is developed to realize their modified projective synchronization. We achieve modified projective synchronization between the two i... In this paper, a nonlinear control scheme of two identical hyperchaotic Chert systems is developed to realize their modified projective synchronization. We achieve modified projective synchronization between the two identical hyperchaotic systems by directing the scaling factor onto the desired value. With symbolic computation system Maple and Lyapunov stability theory, numerical simulations are given to perform the process of the synchronization. 展开更多
关键词 modified projective synchronization nonlinear control method hyperchaotic Chen system
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Synchronization of perturbed chaotic systems via nonlinear control 认领 引用
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作者 郭凌 年晓红 潘欢 《Journal of Central South University》 SCIE EI CAS 2012年第10期2803-2809,共7页
Chaos synchronization of systems with perturbations was investigated.A generic nonlinear control scheme to realize chaos synchronization of systems was proposed.This control scheme is flexible and practicable,and give... Chaos synchronization of systems with perturbations was investigated.A generic nonlinear control scheme to realize chaos synchronization of systems was proposed.This control scheme is flexible and practicable,and gives more freedom in designing controllers in order to achieve some desired performance.With the aid of Lyapunov stability theorem and partial stability theory,two cases were presented:1) Chaos synchronization of the system without perturbation or with vanishing perturbations;2) The boundness of the error state for the system with nonvanishing perturbations satisfying some conditions.Finally,several simulations for Lorenz system were provided to verify the effectiveness and feasibility of our method.Compared numerically with the existing results of linear feedback control scheme,the results are sharper than the existing ones. 展开更多
关键词 chaotic system synchronization perturbations nonlinear control scheme linear feedback scheme
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TIME PRECISE INTEGRATION METHOD FOR CONSTRAINED NONLINEAR CONTROL SYSTEM 认领 引用
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作者 邓子辰 钟万勰 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2002年第1期18-25,共8页
For the constrained nonlinear optimal control problem, by taking the first term of Taylor series, the dynamic equation is linearized. Thus by, introducing into the dual variable (Lagrange multiplier vector), the dynam... For the constrained nonlinear optimal control problem, by taking the first term of Taylor series, the dynamic equation is linearized. Thus by, introducing into the dual variable (Lagrange multiplier vector), the dynamic equation can be transformed into Hamilton system from Lagrange system on the basis of the original variable. Under the whole state, the problem discussed can be described from a new view, and the equation can be precisely solved by, the time precise integration method established in linear dynamic system. A numerical example shows the effectiveness of the method. 展开更多
关键词 nonlinear control system constraint equation time precise integration
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The Application and Design of the Economical Nonlinear Controller 认领 引用
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作者 陈杰 龚至豪 +1 位作者 陈绿深 周宁 《Journal of Beijing Institute of Technology》 EI CAS 1995年第1期47+42-47,共48页
This anticle gives a design method of the economical nonlinear controller. The controller is composed of an expert intelligent coordination controller, a fuzzy prediction controller, a fuzzy feedforward controller, a ... This anticle gives a design method of the economical nonlinear controller. The controller is composed of an expert intelligent coordination controller, a fuzzy prediction controller, a fuzzy feedforward controller, a nonlinear controller and so on. The consistence of a distributed control system based on this controller is also shown briefly. 展开更多
关键词 fuzzy control theory nonlinear control system predictions distributed control system/intelligent control
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Nonlinear control for global stabilization of multiple-integrator system by bounded controls 认领 引用
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作者 Bin ZHOU Guangren DUAN Liu ZHANG 《控制理论与应用（英文版）》 2008年第3期293-299,共7页
The global stabilization problem of the multiple-integrator system by bounded controls is considered.A nonlinear feedback law consisting of nested saturation functions is proposed.This type of nonlinear feedback law t... The global stabilization problem of the multiple-integrator system by bounded controls is considered.A nonlinear feedback law consisting of nested saturation functions is proposed.This type of nonlinear feedback law that is a modification and generalization of the result given in[1]needs only[(n+1)/2](n is the dimensions of the system)saturation elements,which is fewer than that which the other nonlinear laws need.Furthermore,the poles of the closedloop system can be placed on any location on the left real axis when none of the saturation elements in the control laws is saturated.This type of nonlinear control law exhibits a simpler structure and can significantly improve the transient performances of the closed-loop system,and is very superior to the other existing methods.Simulation on a fourth-order system is used to validate the proposed method. 展开更多
关键词 Multiple integrators Nonlinear control Bounded control Convergence performance
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High-Accuracy Pneumatic Position Control by Applying Nonlinear Control and Arranging Transient Process 认领 引用
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作者 王燕波 包刚 《Journal of Southwest Jiaotong University(English Edition)》 2008年第4期386-391,共6页
By applying a nonlinear control and arranging a transient process, the initiative error of the pneumatic servo positioning system is reduced largely, and a larger gain of the controller is used to improve the respondi... By applying a nonlinear control and arranging a transient process, the initiative error of the pneumatic servo positioning system is reduced largely, and a larger gain of the controller is used to improve the responding speed of the system at the same damping ratio. Therefore, a compromise is made among the responding speed, overshoot, robustness, adaptability and stability. In addition, a dynamic output feedback controller, including position velocity and acceleration （PVA） feedback, is designed to improve the performance of the system. And a nonlinear controller is reconstructed based on the linear output feedback controller to decrease noises and disturbances. The dynamic responses of the system are simulated and tested. Results show that the error is kept within 0.02 mm under different mass loads and the positioning transient process is smooth, without overshoot and speedy. 展开更多
关键词 Pneumatic position control system Transient process Nonlinear control
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Review:Recent advances in nonlinear control technologies for shape memory alloy actuators 认领 引用 被引量：3
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作者 SREEKUMAR M. SINGAPERUMAL M. +2 位作者 NAGARAJAN T. ZOPPI M. MOLFINO R. 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2007年第5期818-829,共12页
This paper reviews recent developments in nonlinear control technologies for shape memory alloy (SMA) actuators in robotics and their related applications. SMA possesses large hysteresis, low bandwidth, slow response,... This paper reviews recent developments in nonlinear control technologies for shape memory alloy (SMA) actuators in robotics and their related applications. SMA possesses large hysteresis, low bandwidth, slow response, and non-linear behavior, which make them difficult to control. The fast response of the SMA actuator mostly depends upon, (1) type of controller, (2) rate of addition and removal of heat, and (3) shape or form of the actuator. Though linear controllers are more desirable than nonlinear ones, the review of literature shows that the results obtained using nonlinear controllers were far better than the former one. Therefore, more emphasis is made on the nonlinear control technologies taking into account the intelligent controllers. Various forms of SMA actuator along with different heating and cooling methods are presented in this review, followed by the nonlinear control methods and the control problems encountered by the researchers. 展开更多
关键词 Shape memory alloy （SMA） actuators Nonlinear control Micro robots Hysteresis Position control Robotic manipulators
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Operator-Based Robust Nonlinear Control for SISO and MIMO Nonlinear Systems With PI Hysteresis 认领 引用 被引量：3
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作者 Shuhui Bi Lei Wang +1 位作者 Shengjun Wen Mingcong Deng 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2018年第2期523-530,共8页
In this paper, operator based robust nonlinear control for single-input single-output(SISO) and multi-input multi-output(MIMO) nonlinear uncertain systems preceded by generalized Prandtl-Ishlinskii(PI) hysteresis is c... In this paper, operator based robust nonlinear control for single-input single-output(SISO) and multi-input multi-output(MIMO) nonlinear uncertain systems preceded by generalized Prandtl-Ishlinskii(PI) hysteresis is considered respectively. In detail, by using operator based robust right coprime factorization approach, the control system design structures including feedforward and feedback controllers for both SISO and MIMO nonlinear uncertain systems are given, respectively.In which, the controller design includes the information of PI hysteresis and its inverse, and some sufficient conditions for the controllers in both SISO and MIMO systems should be satisfied are also derived respectively. Based on the proposed conditions, influence from hysteresis is rejected, the systems are robustly stable and output tracking performance can be realized.Finally, the effectiveness of the proposed method is confirmed by numerical simulations. 展开更多
关键词 Index Terms-Generalized PI hysteresis operator based robustright coprime factorization robust nonlinear control.
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Nonlinear Control of Magnetically-geared Drive-trains 认领 引用 被引量：1
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作者 Ryan Montague Chris Bingham 《International Journal of Automation and computing》 CSCD 2013年第4期319-326,共8页
The paper considers certain impedimental issues related to the use of magnetic gearbox and magnetic coupling technologies in high performance servo control systems. A prototype magnetic coupling is used as a basis for... The paper considers certain impedimental issues related to the use of magnetic gearbox and magnetic coupling technologies in high performance servo control systems. A prototype magnetic coupling is used as a basis for demonstrating that the underlying torque transfer characteristic is significantly nonlinear when transmitted torque approaches the maximum designed pull-out torque of the device. It is shown that linear controllers for speed control proportional plus integral （PI） and position control proportional plus derivative （PD） result in acceptable performance provided the magnetic coupling operates below 80 % of designed pull-out torque. To fully compensate for the inherent nonlinearity of the torque transfer characteristic, feedback linearizing control laws and state transformations are derived resulting in exactly linear input-output characteristic for position and speed control of magnetically-geared drive-trains. With the addition of state feedback, the closed-loop dynamics for both position and speed control of a magnetically-geared drive-train can be designed to satisfy the integral of time multiplied by absolute error （ITAE） optimized linear response for a step input. Outstanding results are demonstrated through simulation and experimental real-time implementation on a demonstrator magnetically-geared drive-train. 展开更多
关键词 Magnetic gears magnetic couplings linear control nonlinear control feedback linearization.
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Finite-time Consensus for Multi-agent Systems via Nonlinear Control Protocols 认领 引用 被引量：2
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作者 Ya-Kun Zhu Xin-Ping Guan Xiao-Yuan Luo 《International Journal of Automation and computing》 CSCD 2013年第5期455-462,共8页
This paper investigates the fnite-time consensus problem of multi-agent systems with single and double integrator dynamics,respectively.Some novel nonlinear protocols are constructed for frst-order and second-order le... This paper investigates the fnite-time consensus problem of multi-agent systems with single and double integrator dynamics,respectively.Some novel nonlinear protocols are constructed for frst-order and second-order leader-follower multi-agent systems,respectively.Based on the fnite-time control technique,the graph theory and Lyapunov direct method,some theoretical results are proposed to ensure that the states of all the follower agents can converge to its leader agent s state in fnite time.Finally,some simulation results are presented to illustrate the efectiveness of our theoretical results. 展开更多
关键词 Finite-time consensus multi-agent systems nonlinear control protocol leader-follower single and double integratordynamics
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Improving the Performance of Motor Drive Servo Systems via Composite Nonlinear Control 认领 引用 被引量：1
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作者 Guoyang Cheng Wentao Yu Jin-gao Hu 《CES Transactions on Electrical Machines and Systems》 CSCD 2018年第4期399-408,共10页
This paper presents a discrete-time design of robust compositenonlinear controller to achieve fast and accurate set-pointtracking for motor servo systems subject to actuator saturationand disturbances.The basic idea h... This paper presents a discrete-time design of robust compositenonlinear controller to achieve fast and accurate set-pointtracking for motor servo systems subject to actuator saturationand disturbances.The basic idea here is to use a combination oflinear and nonlinear control,together with a disturbancerejection mechanism based on extended state observer.The linearcontrol part is designed to yield a fast response,and thenonlinear part serves to reduce the overshoot,while the extendedstate observer estimates simultaneously the state vector and theunknown disturbance for control and compensation.The closed-loopstability is analyzed using the Lyapunov theory.Practicalapplication in a permanent magnet synchronous motor position servosystem is given to demonstrate the effectiveness of the proposedcontrol scheme. 展开更多
关键词 Disturbance rejection motion control nonlinear control observer servo systems transient performance
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The nonlinear control of simulator of hexapod parallel mechanism 认领 引用
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作者 潘春萍 管欣 +1 位作者 卢颖 梁建民 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第3期393-397,共5页
In order to enhance the innervation fidelity of simulators,a nonlinear controller is developed,which guarantees parallel mechanisms closed loop system global asymptotical stability and the convergence of posture track... In order to enhance the innervation fidelity of simulators,a nonlinear controller is developed,which guarantees parallel mechanisms closed loop system global asymptotical stability and the convergence of posture tracking error in Cartesian space. The problems of rapid tracking under the condition of the wide range,nonlinear and variable load are solved. After the nonlinear controller is actually applied to the hexapod parallel mechanisms of simulator,the dynamic-static capabilities of motion system are tested by amplitude-frequency response and posture precision. The experimental results show that the static precision improves ten times and system output amplitude increases and the phase lag reduces with respect to the same input signal in Cartesian space in comparison with the traditional proportional and derivative (i.e. PD) controlling method in joint space. Therefore the nonlinear controller can effectively improve the dynamic-static response performance of the hexapod parallel mechanisms of simulators in Cartesian space. 展开更多
关键词 simulators hexapod parallel mechanisms dynamics model nonlinear control irmervation＇ s fidelity
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