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IEEE 5th Information Technology and Mechatronics Engineering Conference (ITOEC)

作者： Hong, Mei Shandong Polytech Jinan 250104 Shandong Peoples R China

ISBN: (纸本)9781728143231;9781728143224

A posture transformation control strategy between two-foot and four-foot of a deformable robot is *** robot can be transformed into a two-foot walking mode or a four-foot walking mode as needed which makes it has the advantages and functions of both a biped robot and a quadruped *** of uncertain factors during the modeling process, the sliding mode variable structure control is used to determine the rotation speed of the robot body. The robustness and load capacity of the system are all improved, and the robot can always keep balanced during the posture transformation process.

关键词： deformable robot posture transformation sliding mode variable structure control

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PLC Based variable structure control of Hydraulic Position Servo System Considering controller Saturation 13

PLC Based Variable Structure Control of Hydraulic Position S...

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13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Ren, Hai-Peng Wang, Xuan Xian Univ Technol Shaanxi Key Lab Complex Syst Control & Intelligen Xian Shaanxi Peoples R China

ISBN: (纸本)9781538637586

Due to the advantages of strong carrying capacity and fast response speed, hydraulic servo system has been widely used in industrial motion control field. The hydraulic servo system is susceptible to the non-linearity, parameter uncertainty and unknown disturbance, which makes the high performance position control of the hydraulic servo system become a challenge. In this paper, considering the hydraulic position servo control system with input saturation, a sliding mode variable structure controller with shrinking boundary layer is designed. The proposed method is used to experimentally track three kinds of reference signals based on Programmable Logic controller (PLC), i.e., S7-200PLC, and hydraulic control system provided by Festo company. The experiment results indicate that the proposed method is effective and achieves smaller steady state tracking error as compared with sign function robust item and the conventional PID control.

关键词： hydraulic servo system input saturation limited S7-200PLC sliding mode variable structure control

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sliding mode control of a welding mobile manipulator

Sliding mode control of a welding mobile manipulator

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International Conference on Energy, Environment and Sustainable Development (ICEESD 2011)

作者： Mei Hong Shandong Univ Technol Sch Agr & Food Engn Zibo Shandong Peoples R China

ISBN: (纸本)9783037852651

A new sliding mode variable structure controller is proposed. First, aiming at improving the convergence speed, a new nonlinear sliding mode surface is proposed. Then, the initial error speed is designed to make the initial state of the system to be just on the sliding mode surface which is to impair the chattering and improve the robustness of the controller. Finally, a mobile manipulator with two arms is taken as an example to simulate the trajectory tracking with the proposed controller. It is found that system shows high convergence speed and strong robustness against disturbance. The chattering is also impaired greatly.

关键词： sliding mode variable structure control sliding mode surface initial state trajectory tracking

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Improved Direct Torque control of Permanent Magnet Synchronous Motor

Improved Direct Torque Control of Permanent Magnet Synchrono...

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4th IEEE Conference on Industrial Electronics and Applications

作者： Cui Jiefan Fu Yue Yang Xia Shenyang Univ Technol Sch Elect Engn Shenyang 110178 Peoples R China Shenyang Univ Technol Engn Training Ctr Shenyang 110178 Peoples R China

ISBN: (纸本)9781424427994

Traditional direct torque control causes torque ripple naturally because of its basic Bang-bang control principle. The sliding mode variable structure control with fuzzy logic is presented in the paper. Mathematics model of permanent magnet synchronous motor in primary frame had been described. sliding mode variable structure is used to design a reasonable sliding surface for minimum control errors. And fuzzy logic is applied to solve sliding mode wobbling problem. The method of fuzzy sliding mode variable structure control can reduce torque ripple greatly. Analysis results have been curved, which shown the control system still remains fast response and control robustness. The system control performances with the method have been improved obviously.

关键词： direct torque control fuzzy logic sliding mode variable structure control permanent magnet synchronous motor

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Adaptive finite-time modified function projective lag synchronisation with definite attenuation rate for uncertain chaotic systems

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INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE 2018年第10期49卷 2215-2223页

作者： Li, Qiaoping Liu, Sanyang Xidian Univ Sch Math & Stat Xian Shaanxi Peoples R China Henan Inst Sci & Technol Sch Math Sci Xinxiang 453003 Peoples R China

This paper investigates the adaptive finite-time modified function projective lag synchronisation with definite attenuation rate for a class of chaotic systems with unknown parameters. Firstly, a novel integral type terminal sliding surface is proposed to ensure the finite-time stability of the sliding motion. Subsequently, an adaptive finite-time control law is designed to guarantee the occurrence of the sliding motion in a limited time and the accurate estimation of the unknown parameters. Moreover, the exponential attenuation rate designed in this paper can further cut down the synchronisation time. Numerical simulations are presented to verify the feasibility and effectiveness of the proposed method.

关键词： Adaptive finite-time control modified function projective lag synchronisation sliding mode variable structure control chaotic systems exponential attenuation unknown parameters

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Research On the Application of Superconducting Magnetic Energy Storage in the Wind Power Generation System For Smoothing Wind Power Fluctuations

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IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 2021年第5期31卷

作者： Zhai, Yujia Zhang, Jiawei Tan, Ziwei Liu, Xinyi Shen, Boyang Coombs, Tim Liu, Ping Huang, Shoudao Hunan Univ Elect & Informat Engn Changsha 410082 Peoples R China Univ Cambridge Dept Engn Cambridge CB3 0FA England

As the output power of wind farm is fluctuating, it is one of the important ways to improve the schedule ability of wind power generation to predict the output power of wind farm. The operation mode of tracking planned output takes the planned value issued by the grid dispatching as the control basis of wind power generation. This operation mode is easy to control, which not only meets the needs of power grid dispatching, but also improves the reliability and controllability of new energy generation. This paper introduces the traditional PI control strategy of SMES and combines the advantages of SMES and the characteristics of application scenarios, and introduces sliding mode variable structure control into SMES. Through simulation and comparison of two different control modes, it is verified that SMES adopting sliding mode variable structure control have the advantages of fast response speed and strong robustness, which can make the wind farm output stable power according to the planned value.

关键词： Wind power fluctuations Superconducting Magnetic Energy Storage (SMES) PI control sliding mode variable structure control

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An improved adaptive backstepping approach on static var compensator controller of nonlinear power systems

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INTERNATIONAL JOURNAL OF ADAPTIVE control AND SIGNAL PROCESSING 2018年第5期32卷 700-712页

作者： Su, Qingyu Quan, Wanzhen Cai, Guowei Li, Jian Northeast Elect Power Univ Sch Automat Engn Jilin 132012 Jilin Peoples R China Northeast Elect Power Univ Jilin 132012 Jilin Peoples R China

The transient stability problem of a single-machine infinite-bus system with static var compensator is solved in this paper, where the static var compensator controller is designed by an improved backstepping method combining error compensation, adaptive backstepping control, and sliding mode variable structure control. Crucially, the error compensation term, which chooses in the step of virtual control by the adaptive backstepping method, is introduced to ensure that the system states are bounded, maintaining the nonlinearity of the power systems while also improving the speed of parameter identification. Meanwhile, the Lyapunov function is constituted step by step to achieve stability of the subsystem. In addition, a parameter updating law and a nonlinear control law are explicitly given to asymptotically stabilize the closed-loop system. Finally, a simulation is used to illustrate the effectiveness and the practicality of the proposed control approach.

关键词： adaptive backstepping error compensation single-machine infinite-bus system sliding mode variable structure control static var compensator

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A stability control way of bus voltage in DC microgrid with constant power load

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IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 2021年第9期16卷 1187-1194页

作者： Wang, Lihua Liu, Xiaona Ni, Xue Jiang, Shaojie Liu, Siyuan Shandong Univ Sci & Technol Coll Elect & Informat Engn Qingdao 266590 Peoples R China

During the operation of the independent DC microgrid, the bus voltage will fluctuate with the random changes of the load and source. To maintain the stability of the bus voltage, a control strategy needs to be introduced in the DC microgrid. According to the bus voltage change of DC microgrid, this paper establishes a large-signal mathematical model of DC microgrid with constant power load. Taking the bidirectional DC-DC converter as the control object, a sliding mode variable structure controller based on the washout filter is introduced, and the bus voltage is stabilized at the desired voltage value through the selection of control parameters. The simulation experiment results show that the control strategy proposed in this paper can effectively restrain the fluctuation of the bus voltage under the condition of random changes of the load and source and has strong robustness. (c) 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

关键词： independent DC microgrid constant power load sliding mode variable structure control ro-bustness

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Differential Steering control of Four-Wheel Independent-Drive Electric Vehicles

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ENERGIES 2018年第11期11卷

作者： Tian, Jie Tong, Jun Luo, Shi Nanjing Forestry Univ Coll Automobile & Traff Engn Nanjing 210037 Jiangsu Peoples R China Jiangsu Univ Coll Automobile & Traff Engn Zhenjiang 212013 Peoples R China

This paper investigates the skid steering of four-wheel independent-drive (4WID) electric vehicles (EV) and a differential steering of a 4WID EV with a steer-by-wire (SBW) system in case of steering failure. The dynamic models of skid steering vehicle (SSV) and differential steering vehicle (DSV) are established and the traditional front-wheel steering vehicle with neutral steering characteristics is selected as the reference model. On this basis, sideslip angle observer and two different sliding mode variable structure controllers for SSV and DSV are designed respectively. Co-simulation results of CarSim and Simulink show that the designed controller for DSV not only controls the yaw rate and sideslip angle of DSV to track those of the reference model exactly, but also ensures the robustness of the controlled system compared with the designed controller for SSV. And the differential driving torque needed to realize the differential steering is much smaller than that for skid steering, which indicates the possibility of the differential steering in case of steering failure.

关键词： four-wheel independent-drive electric vehicle skid steering differential steering sliding mode variable structure control robustness

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A robust voltage control of dual active full bridge converter based on RBF neural network sliding mode control with reduced order modeling approach

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FRONTIERS IN ENERGY RESEARCH 2023年 11卷

作者： Wang, Xiaosong Wang, Dazhi Sun, Guofeng Ni, Yongliang Song, Keling Li, Yanming Northeastern Univ Sch Informat Sci & Engn Shenyang Peoples R China State Grid Shandong Elect Power Co Yantai Peoples R China China North Vehicle Res Inst Beijing Peoples R China

This paper presents a control method of dual active full bridge (DAB) DC/DC converter based on neural network sliding mode control under the reduced order modeling method, which is used to enhance the output voltage regulation and improve the system robustness. sliding mode control (SMC) is famous for its robustness and improving the dynamic performance of nonlinear systems. However, it includes drawbacks such as complex modeling, chattering, and decreased tracking performance. Therefore, through the method of reduced order modeling, the Radial Basis Function neural network algorithm is selected to modify and design the traditional sliding mode variable structure controller, completing the design of neural network approximation terms and adaptive laws. The proposed reduced order modeling and RBF(Radial Basis Function Neural Network)-SMC scheme simplifies the dual active full bridge modeling process, completes the parameter approximation of the sliding mode controller, and eliminates the chattering problem. Firstly, through simulation and comparative analysis of commonly used modeling methods for dual active full bridge, a reduced order modeling method was adopted to simplify the design process. Then, by ingeniously designing the sliding mode surface and Radial Basis Function control law, and using neural network to modify the sliding mode control technology, the chattering problem, load disturbance and voltage fluctuation influence of the sliding mode controller are improved. The stability of the control method is proved by Lyapunov stability theory. Finally, the proposed RBF-SMC method is compared with PI linear control and classical sliding mode control methods through simulation and experiments to verify the effectiveness of the proposed control method.

关键词： dual active full bridge converter reduced order mode sliding mode variable structure control RBF neural network dynamic response

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