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A Speed control Method for Underwater Vehicle under Hydraulic Flexible Traction

JOURNAL OF control SCIENCE AND ENGINEERING 2015年第1期2015卷 16-16页

作者： Zhao, Yin Xia, Ying-kai Chen, Ying Xu, Guo-Hua Huazhong Univ Sci & Technol Sch Naval Architecture & Ocean Engn Wuhan 430074 Peoples R China

Underwater vehicle speed control methodology method is the focus of research in this study. Driven by a hydraulic flexible traction system, the underwater vehicle advances steadily on underwater guide rails, simulating an underwater environment for the carried device. Considering the influence of steel rope viscoelasticity and the control system traction structure feature, a mathematical model of the underwater vehicle driven by hydraulic flexible traction system is established. A speed control strategy is then proposed based on the sliding mode variable structure of fuzzy reaching law, according to nonlinearity and external variable load of the vehicle speed control system. sliding mode variable structure control theory for the nonlinear system allows an improved control effect for movements in "sliding mode" when compared with conventional control. The fuzzy control theory is also introduced, weakening output chattering caused by the sliding mode control switchover while producing high output stability. Matlab mathematical simulation and practical test verification indicate the speed control method as effective in obtaining accurate control results, thus inferring strong practical significance for engineering applications.

关键词： vehicle research report Velocity control sliding mode variable structure control Nonlinear systems control Methods sliding mode Hydrodynamics handoff Underwater fuzzy control theory underwater vehicles control effect traction system Wet underwater environment

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control of Mutual Dragging Test for Motorized Spindle Based on Improved Direct Torque control 12

Control of Mutual Dragging Test for Motorized Spindle Based ...

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12th International Conference on Reliability, Maintainability, and Safety (ICRMS)

作者： Tian, Hailong Yang, Zhaojun Chen, Lei Chen, Chuanhai Guo, Jinyan Ying, Jun Zhao, Hongxun Jilin Univ Sch Mech Sci & Engn Changchun Jilin Peoples R China

ISBN: (纸本)9781538670767

Motorized spindle is widely used as the core functional part of CNC machine tools. In order to detect failures and correct in time before the products are released, shorten the reliability test cycle and reduce test cost, the development of reliability test system for motorized spindle has become one of the key technologies. The control method of spindle is crucial for the reliability test system and the commonly method is direct torque control. But the traditional direct torque control will cause large torque pulsation due to the application of the hysteresis controller. Aiming at this problem, this paper takes the motorized spindle mutual dragging test system as the control object and uses sliding mode variable structure control to improve the direct torque control. According to the principles of direct torque control and sliding mode variable structure control, the control equation of the improved method is established based on the switching functions of torque and flux. The control method is simulated under specific conditions in Matlab/Simulink. The simulation results show that compared with the traditional direct torque control method, the improved method can make the spindle reach the predetermined working state faster, make fluctuations of the flux linkage and torque smaller and make the control more accurate. The improved method is verified effective to control the motorized spindle.

关键词： motorized spindle mutual dragging test direct torque control sliding mode variable structure control

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Research on sliding mode control Strategy of Demotion Robot's Working Equipment By Means of ADAMS and Simulink 4

Research on Sliding Mode Control Strategy of Demotion Robot'...

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4th International Conference on Information Science and control Engineering (ICISCE)

作者： Zhang Jian-peng Cen Yu-wan Huang Jian-zhong Ye Xiao-hua Anhui Univ Technol Sch Mech Engn Maanshan 243002 Anhui Peoples R China Natl Machine Qual Supervis & Inspect Ctr MAANSHAN Maanshan 243002 Anhui Peoples R China

ISBN: (纸本)9781538630136

Based on the working principle of the electrohydraulic proportional control system of the working device of the demolition robot, the co-simulation model of the system is established by means of ADAMS and MATLAB. The study of the dynamic characteristics of the system was done, with applying traditional PID control strategy and sliding mode variable structure control respectively, considering the change of the control object parameters caused by the pose change of the working device and the external disturbances. The co-simulation results show that the sliding mode variable structure control strategy has excellent dynamic performance, better robustness and faster response compared with traditional PID.

关键词： demolition robot electro-hydraulic proportional control system co-simulation sliding mode variable structure control

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Study on Multi-path Planning and Tracking control of the UCAV Based on Evolutionary Algorithm 15

Study on Multi-path Planning and Tracking Control of the UCA...

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15th International Conference on control, Automation and Systems (ICCAS)

作者： Huang, Hanqiao Zhou, Huan Cai, Yawei Air Force Engn Univ Aeronaut & Astronaut Engn Coll Xian 710038 Peoples R China

ISBN: (纸本)9788993215090

Aiming at studying the multi-path planning and tracking control of the unmanned combat aerial vehicle(UCAV) in multi-constraints condition. In this paper, the mathematic model of the UCAV is built, then, the chromosome representation of path nodes and fitness function are proposed based on evolutionary algorithm. According to different operational requirements, the multi-path planning algorithm is put forward. Secondly, the paths are smoothened to get the attitude solved. Finally, the tracking of the trajectory attitude and velocity are realized with dynamics model of the UCAV by sliding mode variable structure control method. Simulation results demonstrate that the multi-path planned under the dynamic operational environment can meet different requirements, and the tracking controller has good accuracy and robustness.

关键词： unmanned combat aerial vehicle(UCAV) multiple path planning evolutionary algorithm sliding mode variable structure control

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Suppression of Parameter Perturbation in Active Power Filter Based on sliding mode control

Suppression of Parameter Perturbation in Active Power Filter...

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第三十二届中国控制会议

作者： LIU Guohai SUN Jingjing CHEN Zhaoling QIAN Peng LIAO Zhiling College of Electrical and Information Engineering Jiangsu University

ISBN: (纸本)9781479900305

In order to avoid deviding the system model of the shunt active power filter which is developed in the synchronous dq reference frame into two separate loops,an unified control strategy used for harmonic current tracking and dc link voltage stability of the shunt active power filter is presented and realized by the sliding mode variable structnre *** analyzing the stability of the Lyapunov function,the robustness of the shunt active power filter is derived and the stability condition of sliding mode is *** method characterizes suppression to parameter ***,the simulation results show that the presented method is simple to be designed,easy to be realized,and exhibits strong robustness and good dynamic characteristics.

关键词： Shunt Active Power Filter sliding mode variable structure control Parameter Perturbation

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Networked control based on sliding mode for a class of state-delayed system

Networked control based on sliding mode for a class of state...

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6th World Congress on Intelligent control and Automation

作者： Xu, Jinxue Wang, Lu Li, Yuan Shenyang Univ Technol Sch Informat Sci & Engn Shenyang 110023 Peoples R China Shenyang Inst Chem Technol Sch Informat Engn Shenyang 110142 Peoples R China

ISBN: (纸本)1424403316

In the light of the commonly existing time delay in the networked control system, the design method of sliding mode controller for overcoming the influence of the state delay is proposed, which has the advantage of invariability for system in the presence of parameter variations, uncertainties and disturbances, and guarantees closed-loop system stability and robustness. When the system is in the sliding mode, the dynamic equations of the closed-loop system can be reduced to a linear form and its eigenvalues can be arbitrarily assigned. The stability of the whole system is proven by utilizing the linear matrix inequalities (LMI). The simulation results show that this method is effective and feasible.

关键词： networked control system time delay sliding mode variable structure control sliding mode compensator

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Study of Nonlinear control Strategy on VAV Terminal Unit

Study of Nonlinear Control Strategy on VAV Terminal Unit

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9th World Congress on Intelligent control and Automation (WCICA)

作者： Wang, Yahui Zhang, Tong Huo, Yifeng Beijing Univ Civil Engn & Architecture Sch Elect & Informat Engn Beijing 100044 Peoples R China Beijing Bldg Qual Monitoring Stn Beijing 100044 Peoples R China

ISBN: (纸本)9781612847009

In this paper, the simulation control experiments on the VAV terminal unit are studied. First of all, the sliding mode variable structure control (SMVSC) algorithm based on nonlinear exact linearization for single-input single-output nonlinear systems is proposed. Then the model of air-damper and air-conditioning room is identified, and the comparative simulation control experiments between SMVSC algorithm based on nonlinear exact linearization and PID control algorithm on the VAV terminal unit are compared. The results show that the control results are better than the PID control in system overshoot, system response time and tracking effect;the control level achieves the intended purpose.

关键词： Nonlinear Exact Linearization sliding mode variable structure control VAV Terminal Unit Simulation control Experiments

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Research on sliding mode control of Cement Decomposing Furnace Based on T-S Fuzzy model

Research on Sliding Mode Control of Cement Decomposing Furna...

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Chinese Automation Congress (CAC)

作者： Guan, Rongzhen Yuan, Zhugang Feng, Zhanqing Univ Jinan Sch Elect Engn Jinan 250022 Shandong Peoples R China

ISBN: (纸本)9781728113128

Aiming at the control problem of cement decomposing furnace outlet temperature, the T-S fuzzy model and sliding mode variable structure control are combined to propose a sliding mode variable structure control strategy for cement decomposition furnace based on T-S fuzzy model. The sliding surface based on the combined approach law is constructed, and the controller design process is given to avoid the chattering problem of the sliding mode before and during the sliding mode and the traditional sliding mode. The Lyapunov stability theorem is used to guarantee the global asymptotic stability of the system state. Finally, the Matlab simulation shows that the controller is effective and robust.

关键词： T-S fuzzy model cement decomposing furnace sliding mode variable structure control

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Application Analysis of the Fuel Viscosity and Temperature control System Based on the sliding mode Theory

Application Analysis of the Fuel Viscosity and Temperature C...

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2nd International Conference on Frontiers of Manufacturing Science and Measuring Technology (ICFMM 2012)

作者： Liu, Zhuanzhao Chang, Deshang Liu, Xinjian Shandong Jiaotong Univ Maritime Coll Weihai 264200 Shandong Peoples R China Shandong Maritime Safety Adm Qingdao 266002 Peoples R China

ISBN: (纸本)9783037854044

With the shortage of the petroleum resources day by day, the fuel oil price is becoming higher and higher. The ship companies want to use the heavy diesel oil and inferior fuel with lower price for the marine diesel. Temperature is a variable with great inertia. Using the PID control algorithm, which will lead to the consequence of over correction in the controlling process, the advantage of sliding mode variable structure control is the small over correction. In this paper, based on thermodynamics and heat transfer theory, the mathematical model of temperature control system is built, the sliding mode movement equation and the sliding mode variable structure controller is obtained. This makes the application of temperature control take the advantage of sliding mode variable structure control.

关键词： Fuel oil temperature control PID control sliding mode variable structure control State equation

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Design and Implementation of Suspension Decoupling controller for Multi-DOF Maglev Positioning Platform

Design and Implementation of Suspension Decoupling Controlle...

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Chinese Automation Congress (CAC)

作者： Yang, Yang Dai, Chunhui Zhang, Hehong Long, Zhiqiang Natl Univ Def Technol Coll Intelligent Sci Changsha 410073 Hunan Peoples R China

ISBN: (纸本)9781728140940

Precision positioning platform is the key component of semiconductor lithography and precision manufacturing. In this paper, a multi-degree-of-freedom maglev precise positioning platform with a wide range of travel is studied, and the three-degree-of-freedom dynamic modeling and decoupling control of the platform suspension system are studied. The sliding mode variable structure control strategy is introduced to decouple the three-degree-of-freedom coupled system, and the extended state observer is introduced to observe the internal and external disturbances of the system. Using the the three-point levitation system in the laboratory, the control algorithm of the levitation controller of the positioning platform is designed and implemented. The specific experimental results are given and compared.

关键词： maglev positioning platform levitation controller decoupling control sliding mode variable structure control

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