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14th IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Liao, Weiqi Li, Lei Nanjing Univ Sci & Technol Coll Automat Nanjing Peoples R China

ISBN: (纸本)9781538694909

The cascaded H-bridge rectifier (CHBR) control consists of two parts, namely whole control and DC voltage balance control. Double closed-loop proportional integral (PI) control strategy with current feedforward decoupling and proportional pulse compensation strategy are typical whole control strategy and voltage balance strategy respectively, which can realize unity-power factor and DC voltage balance with good performance under special working condition. However, when the CHBR system is unstable or disturbed, the conventional double closed-loop PI control would cause some problems such as slow response speed and big overshoot. This paper proposes a sliding mode variable structure control (SMVSC) strategy for whole control through modeling analysis on the CHBR circuit. By choosing the appropriate switching surface to make the system state trajectory set on the sliding mode surface, the proposed SMVSC strategy can improve the response speed of DC voltage and the dynamic performance of the system. Furthermore, modeling analysis for proportional pulse compensation strategy is proposed. Simulation results verify the feasibility and effectiveness of the proposed strategy.

关键词： cascaded H-bridge rectifier whole control DC voltage balance control double closed-loop PI control sliding mode variable structure control

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Electro-hydraulic Servo System For Human Lower-limb Exoskeleton Based On sliding mode variable structure control

Electro-hydraulic Servo System For Human Lower-limb Exoskele...

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IEEE International Conference on Information and Automation (ICIA)

作者： Tang Zhiyong Shi Di Liu Difei Peng Zhaoqin He Longlong Pei Zhongcai Beihang Univ Sch Automat Sci & Elect Engn Beijing 100191 Peoples R China

ISBN: (纸本)9781479913343

Human Lower-limb Exoskeleton has recently received a great deal of attention, because of providing motion similar to human walking and reducing burden on both patients and therapists. In this paper the design of the control system for HLE which is actuated by electro-hydraulic servo system is presented. To improve the flexibility of the system, a control algorithms called sliding mode variable structure control was adopted. The simulation and results show that the controller has a better dynamic performance.

关键词： human lower-limb exoskeleton sliding mode variable structure control electro-hydraulic servo system

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A robust active queue management algorithm based on sliding mode variable structure control

A robust active queue management algorithm based on sliding ...

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21st Annual Joint Conference of the IEEE-Computer-and-Communications-Societies

作者： Ren, FY Lin, C Ying, XH Shan, XM Wang, FB Tsinghua Univ Dept Comp Sci Beijing 100084 Peoples R China

ISBN: (纸本)0780374762

As an effective mechanism acting on the intermediate nodes to support end-to-end congestion control, Active Queue Management (AQM) takes a trade-off between link utilization and delay experienced by data packets. Most of existed AQM algorithms are heuristic, and lack systematic and theoretical design and analysis approach. From the viewpoint of the control theory, it is rational to regard AQM as a typical regulating system. Although PI controller for AQM outperforms RED algorithm, the mismatches in simplified TCP flow model inevitably degrades the performance of controller designed with classical control theory. In this paper, a robust SMVS controller for AQM is put forward based on sliding mode variable structure control (SMVS), its superiority is insensitive to noise and variance of the parameters, thus it very suitable to time-varying network system. The principle and guidelines on design of SMVS controller are presented in details. The integrated performance is evaluated using ns simulations. The results show that the SMVS is very responsive and robust against the disturbance. At the same time, a complete comparison between SMVS controller and PI controller is made. The conclusion is that both transient and steady performance of SMVS controller is superior to that of PI controller, thus the SMVS controller is in favor of the achievement to AQM objectives.

关键词： telecommunication congestion control packet switching queueing theory transport protocols Internet computer network management delays time-varying systems robust active queue management algorithm sliding mode variable structure control intermediate nodes end-to-end congestion control AQM link utilization delay data packets control theory regulating system PI controller simplified TCP flow model SMVS controller time-varying network system transient performance steady performance TCP congestion control mechanism

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Research on Straight Line Stability control Strategy of Four Wheel Drive Vehicle Based on the sliding mode variable structure control and Optimization Algorithm

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Energy Procedia 2016年 104卷 342-347页

作者： Wang Zhifu Zhou Yang Li Chaopeng Fang Jun Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081 China United Automotive Electronic Systems Co. Ltd.555 Rongqiao StreetPudong New AreaShanghai 201206 China

After the reference of straight line stability control strategy of four-wheel drive vehicle, this paper proposes a control algorithm combining the sliding mode variable structure and optimization control method. The control algorithm is mainly divided into the upper generalized moment calculation based on the sliding mode variable structure controller and the lower torque distribution controller based on the optimization algorithm, also including the slip rates controller based on PID algorithm to ensure the straight line stability control. This paper establishes the combined model based on the CarSim and MATLAB, and tests to verify the validation of the control strategy through the four-wheel drive vehicle test-bed based on RT_LAB. The simulation and experimental results show that when the tire-road friction coefficient is low, the control strategy can not only make the vehicle tire slip rates stay near the optimal slip ratio, at the same time through the yawing moment adjustment, ensure the yaw angle of vehicle not beyond 0.5 deg/s, so the method can effectively ensure the straight line stability of four wheel drive vehicle.

关键词： Four-Wheel Drive Vehicle sliding mode variable structure control Optimization Algorithm

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The Strategy of Quasi-sliding mode variable structure control with RBF Neural Network Acting on The Large Time-Delay System

The Strategy of Quasi-Sliding Mode Variable Structure Contro...

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27th Chinese control Conference

作者： Wang Yahui Cheng Peixin Zhao Yadan Zhang Tong Beijing Univ Civil Engn & Architecture Elect & Informat Engn Dept Beijing 100044 Peoples R China

ISBN: (纸本)9787900719706

In this paper, a quasi-sliding mode variable structure control algorithm is combined with RBF neural network. So, the strong robustness of the quasi-sliding mode variable structure algorithm and the property of adaptive learning supplying from RBF neural network algorithm are combined. The algorithm is subsequent inducted, into the large time-delay system. Simulation results show that the strategy is feasible and effective under the certain conditions.

关键词： Time-delay system sliding mode variable structure control RBF neural network

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PWM rectifier research based on sliding mode variable structure control

PWM rectifier research based on sliding mode variable struct...

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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Wenchao Fan Guangqing Bao College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou 730050 Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou 730050

Proposed a three-phase voltage PWM rectifiers control plan based on the sliding mode variable structure control theory. After simulate confirmation we can see that the sliding mode variable structure control system has a good robustness and good dynamic performance. At the same time established the three-phase voltage PWM rectifiers control system based on PI algorithm. After simulate confirmation we can also know that its disturbance rejection performance is poor. After comparing the two plans, we can get the conclusion that the three-phase voltage PWM rectifiers control system based on sliding mode variable structure control theory is better than the system based on PI Algorithm.

关键词： PWM rectifier current inner loop PI control sliding mode variable structure control

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Simulation Research on Vehicle Stability based on sliding mode variable structure control

Simulation Research on Vehicle Stability based on Sliding Mo...

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3rd International Conference on Mechatronics Engineering and Information Technology(ICMEIT 2019)

作者： Liyuan He Chenghui Yang Junfeng Wang School of Electrical Engineering Northwest University for Nationalities Laboratory of Electronic Materials Northwest University for Nationalities

This paper aims to explore a vehicle stability control strategy based on sliding mode variable structure control theory. The smart car is used as the simulation object, and the vehicle's centroid angle and control system are mathematically modeled and controlled. The research was carried out and joint simulations were carried out with three typical working conditions: icy road surface, wet asphalt road surface and dry concrete. The simulation results show that the designed control algorithm can significantly improve the lateral stability of the vehicle, so that the vehicle has strong adaptability to the road surface and different driving speed under different working conditions, thus improving the braking of the car as a whole. Performance, drive performance and steering performance.

关键词： sliding mode variable structure control yaw angle pose error vehicle stability simulation

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Application of Fuzzy Self-learning sliding mode variable structure control in Linear AC Servo System

Application of Fuzzy Self-learning Sliding Mode Variable Str...

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CES/IEEE 5th International Power Electronics and Motion control Conference

作者： Qing Hu, Shuo Jie and Dongmei Yu Shenyang University of Technology / School of Electrical Engineering, Shenyang, 110023, China

A sliding mode variable structure control (SMVSC) method based on fuzzy self-learning for a direct-drive AC linear servo system is presented. SMVSC is a special nonlinear control strategy, which has strong robustness against parameter variations, load disturbances and uncertainty of system. This paper proposes that the chattering can be effectively minimized by introducing fuzzy self-learning in conventional sliding mode control, without sacrificing the strong robustness of SMVSC. Simulations show that this kind of method is effective. Simultaneously, the servo system promises good static and dynamic performance.

关键词： sliding mode variable structure control fuzzy control linear servo system fuzzy self- learning chattering

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Experimental Study on sliding mode variable structure Vibration control for Piezoelectric Cantilever Plate

Experimental Study on Sliding Mode Variable Structure Vibrat...

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7th World Congress on Intelligent control and Automation

作者： Qiu, Zhicheng Ye, Chunde Wei, Jingjun S China Univ Technol Coll Mech Engn Guangzhou 510640 Guangdong Peoples R China

ISBN: (纸本)9781424421138

Some flexible appendages of spacecraft are cantilever plate structures, such as sun plate, piezoelectric smart structure is used to suppress the mufti-modal vibrations of the cantilever plate due to the parameter uncertainties and environmental disturbances. Optimal placement of piezoelectric actuators/sensors in active vibration suppression of flexible plate is conducted to control the vibrations of bending modes and torsional modes. The experimental facility of piezoelectric smart plate for active vibration control was designed and built up. A kind of gain select sliding mode variable structure control method is adopted. And experimental studies of identification and vibration control are conducted. The experimental results demonstrate that the adopted method can suppress the vibration significantly, and the strategy is feasible.

关键词： Piezoelectric flexible cantilever plate Active vibration control sliding mode variable structure control Experiments

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Internal-mode Based sliding mode variable structure Attitude control of Flexible Spacecraft 33

Internal-Mode Based Sliding Mode Variable Structure Attitude...

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33rd Chinese control Conference (CCC)

作者： Jin Xiaoxiao Wu Zhong Beihang Univ Sch Instrumentat Sci & Optoelect Engn Beijing 100191 Peoples R China

ISBN: (纸本)9781479947249

The disturbances of flexible spacecraft, such as the uncertainty of rotary inertia and the external disturbances, can be classified as norm bounded variable, harmonic variable, gradient bounded variable, etc. These disturbances severely impact the attitude stabilization of flexible spacecraft. Aiming at the attitude control of flexible spacecraft, a nonlinear controller combining sliding mode variable structure control and internal model principle is designed, which can suppress both the constant interference and the periodic interference. The close-loop system is proved to be stable based on the Lyapunov method and the numerical simulation results verified the effective of the control approach. Moreover, the results show the rapid convergence and high accuracy of steady state error, and the controller can reduce disturbances efficiently.

关键词： flexible spacecraft sliding mode variable structure control internal model principle attitude stabilization

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