Terminal sliding mode speed control method of permanent magnet synchronous linear motor based on adaptive parameter identification

• Published in: Advances in mechanical engineering 2021-04, Vol.13 (4)
• Main Authors: Li, Zheng, Zhang, Qingshan, An, Jinfeng, Xiao, Yu, Sun, Hexu
• Format: Article
• Language: English
• Subjects: Adaptive control; Algorithms; Control algorithms; Control methods; Control stability; Control theory; Electric motors; Parameter identification; Permanent magnets; Sliding mode control; Speed control; Speed regulators
• ISSN: 1687-8132; 1687-8140
• DOI: 10.1177/16878140211012901

In order to make the speed adjustment system of the permanent magnet synchronous linear motor more stable and make the convergence performance of the speed control system better, a speed regulator based on the terminal sliding mode algorithm is proposed. In addition, the permanent magnet synchronous linear motor will also be affected by temperature changes during its operation. Aiming to enhance the adaptability of linear motors to parameter changes, a terminal sliding mode speed control idea based on adaptive parameter identification is proposed. The Popov stability theory and the mathematical model of linear motor are used to construct a parameter identification system. The identification flux parameters are used as the control algorithm of the terminal sliding mode speed regulator and the update matching of speed regulator flux parameters and motor system parameters are realized. Through the above algorithm, the performance of the entire speed control system is improved. The results of simulation experiments can illustrate the effectiveness of this control method and its effect on improving the control performance.