scholarly journals A Speed Disturbance Control Method Based on Sliding Mode Control of Permanent Magnet Synchronous Linear Motor

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 82424-82433 ◽  
Author(s):  
Dan Jiang ◽  
Wenxin Yu ◽  
Junnian Wang ◽  
Yanming Zhao ◽  
Yan Li ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Permanent Magnet ◽  
Control Method ◽  
Sliding Mode ◽  
Linear Motor ◽  
Mode Control

PMLSM Nonlinear Integral Sliding Mode Control Based on Gain Time- Varying Reaching Law

2020 ◽  
Vol 13 (5) ◽  
pp. 743-750
Author(s):  
Chao Zhang ◽  
Liwei Zhang ◽  
Bo Peng ◽  
He Zhao
Keyword(s):  
Sliding Mode Control ◽  
Permanent Magnet ◽  
Sliding Mode ◽  
Dynamic Performance ◽  
Linear Motor ◽  
Time Varying ◽  
Sliding Surface ◽  
Reaching Law ◽  
Mode Control ◽  
Global Robustness

Background: The permanent magnet synchronous linear motor is a strongly coupled, nonlinear system. It has been applied in many fields, especially in the field of machining lathes and rail transportation. In order to ensure the permanent magnet synchronous linear motor has good dynamic performance and robustness, sliding mode control is gradually applied to the control system of permanent magnet synchronous linear motor. However, in the traditional sliding mode control, the convergence speed is slow, and the robust performance is poor when the sliding surface is not reached. Objective: The main purpose of this paper is to improve the dynamic performance and robustness of the permanent magnet synchronous linear motor during the process of approaching the sliding surface. Methods: Firstly, the type of nonlinear curve with "small error reduction, large error saturation" is introduced to design a nonlinear integral speed controller with global robustness. Secondly, the gain rate time-varying reaching law is introduced to reduce "chattering". Finally, using a symbolic tangent function instead of a sign function in designing a sliding mode observer reduces fluctuations in load observations. Results: Finally, the correctness and effectiveness of the control method are proved by simulation. Conclusion: The results of the simulation show that the nonlinear integral sliding mode controller based on gain time-varying reaching law is shown to have good global robustness and dynamic performance.

scholarly journals A New Adaptive Control for Five-Phase Fault-Tolerant Flux-Switching Permanent Magnet Motor

2016 ◽  
Vol 2016 ◽  
pp. 1-14
Author(s):  
Hongyu Tang ◽  
Wenxiang Zhao ◽  
Chenyu Gu
Keyword(s):  
Adaptive Control ◽  
Sliding Mode Control ◽  
Permanent Magnet ◽  
High Efficiency ◽  
Control Method ◽  
Fault Tolerant ◽  
Sliding Mode ◽  
Backstepping Method ◽  
Control Laws ◽  
Mode Control

The five-phase fault-tolerant flux-switching permanent magnet (FT-FSPM) motor can offer high efficiency and high fault-tolerant capability. In this paper, its operation principle is presented briefly and its mathematical model is derived. Further, a new adaptive control for an FT-FSPM motor, based on the backstepping method and the sliding mode control strategy, is proposed. According to the backstepping method, the current controllers and voltage control laws are designed to track the speed and minimize the current static error, which enhance the dynamic response and the ability to suppress external disturbances. In order to overcome the influence of parameter variations, according to sliding mode control theory, the virtual control variables and the adaptive algorithm are utilized to approach uncertainty terms. Three Lyapunov functions are designed, and the stability of the closed-loop system is analyzed in detail. Finally, both simulation and experimental results are presented to verify the proposed control method.

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