Dissertation > Excellent graduate degree dissertation topics show

Study on Robust Control for PMLSM Suspension Platform

Author: WangYiNa
Tutor: XiaJiaKuan;SunYiBiao
School: Shenyang University of Technology
Course: Power Electronics and Power Drives
Keywords: Permanent-magnet Linear Synchronous Motor Suspension Platform Feedback Linearization Second Order Sliding Mode H_∞Mixed Sensitivity Suspension Stiffness
CLC: TM341
Type: Master's thesis
Year: 2011
Downloads: 35
Quote: 1
Read: Download Dissertation

Abstract


Taking the project supported by Specialized Research Foundation of Higher Doctoral Program as background, this dissertation researches on the high-precision suspension platform constituted by a single permanent-magnet linear synchronous motor (PMLSM), based on feedback linearization method, for the characteristic of suspension and the double requirements of robustness and tracking performance,the second-order sliding mode control, mixed sensitivity method of H∞are combined to solve the robust position control problem of PMLSM suspension servo system with some uncertainties such as nonlinear coupling between variables, decrease of suspension stiffness, parameters variations, end-effects and load disturbances. The main contents are as follows:For the nonlinear coupling problem between variables of PMLSM suspension platform, the nonlinear coordinates transform and nonlinear state feedback are used to decouple the more input more output (MIMO) system into two independent single input single output (SISO) subsystems. For the problem of existence of parameters and load disturbances in addition the problem that the dynamic decoupling result of feedback linearization method is affected by the parameters changes, two second-order sliding mode speed and position controllers are designed for the two linear subsystems. Firstly,the feedback linearization method is designed to accomplish the dynamic decoupling of the MIMO system, then sliding surfaces of horizontal axis controller and vertical axis second-order sliding mode controllers are independently designed. Finally, the robust control laws are designed by super twisting algorithm of second-order sliding mode control. Simulation results show that this strategy preferably achieves the dynamic decoupling between variables of PMLSM suspension system, has good robustness to load and parameters variations, and simultaneously weakens the chattering effectively.H∞speed controller based on Pseudo-differential feedforward and feedback (PDFF)and position proportional controller are designed for the problem that the decrease of suspension stiffness for the suspension platform release the freedom of vertical which result in that the length of air gap is easily affected by the triple of thrust, normal force, load disturbances and other uncertainties. The concept of H∞loop shaping design is intruded to formulate the advanced PDFF to an H∞weighted mixed sensitivity problem,then the advanced PDFF controller can be found by coprime factorization and partial pole-placement technique to achieve the maximize of the dynamic servo stiffness (the minimize of the sensitive function). Simulation results show that the proposed controllers completely accomplish the dynamic decoupling of system and meet the requirement of robustness and rapidity for high-speed high-precision PMLSM suspension system.

Related Dissertations

  1. Permanent magnet linear motor Magnetic Levitation System Control Strategy,TM359.4
  2. Suspended platform PMLSM Second Order Sliding Mode Control,TP273
  3. Spacecraft Attitude Control Research interference suppression,V448.22
  4. Research on the Robust Heading Control for AUV Based on Feedback Linearization in Near Surface,U664.82
  5. Study on Modeling and Controling Autonomous Platoon,TP273.5
  6. Design and Analysis on Suspension System of Maglev Based on Superconductor,TP273
  7. Research and Realization of a Novel Nonlinear Robust Excitation Controller,TM303
  8. The Application and Research on the Roust Control in the Steering System,U664.82
  9. On Problems of Analysis of Epidemical Dynamic Systems and Control of Population Chaotic Systems,R318.01
  10. Nonlinear Excitation Controller Research Based on Wide-Areas Measurement System,TM76
  11. PMSM motion control systems of nonlinear control strategy,TP273.5
  12. Research on Nonlinear Observers Design and Application in Inverted Pendulum System,TP273.5
  13. The Underactuated three Gymnastics Robot Control Strategy,TP242
  14. Research and Application on Continuous-time Nonlinear Model Predictive Control,TP13
  15. Static Synchronous Compensator Control Technology,TM761
  16. Study on Control Strategies of Doubly Fed Induction Generators Low Voltage Ride Through,TM315
  17. Nonlinear Control of a Class of Underactuated Mechanical Systems,TP273.5
  18. Active flutter suppression of a number of issues,V214.33
  19. Study on Control Algorithms of the Hybrid Maglev with Permanent and Electro Magnetics,TP273
  20. Research on H-infinity Control System for Suppessing Strip Jitter,TG142

CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Synchronous motor
© 2012 www.DissertationTopic.Net  Mobile