摘要
针对永磁同步电机伺服系统中存在的抗负载扰动能力差和转速超调等问题,提出一种基于非线性自抗扰控制的新型PMSM速度控制策略。通过分析伺服系统的扰动机理,在速度环将传统的PI控制器替换为非线性自抗扰控制器。通过跟踪-微分器将给定转速平滑化,克服了响应快速性和超调之间的矛盾,提升系统响应能力;通过引入二阶扩张状态观测器,对外部扰动进行估计并补偿,提高系统的抗干扰能力;通过非线性状态误差反馈控制律,利用“小误差大增益,大误差小增益”的非线性控制,提高系统的控制精度。仿真结果表明,系统具有响应快、无超调、抗负载扰动能力强的特点,对负载变化、转速变化具有较强的鲁棒性,验证了该策略的有效性。
A novel PMSM speed control strategy based on nonlinear active disturbance rejection control was proposed to solve the problems of poor anti-load disturbance ability and speed overshoot in PMSM servo system. By analyzing the disturbance mechanism of the servo system, the traditional PI controller is replaced by a nonlinear active disturbance rejection controller in the speed loop. The contradiction between response speed and overshoot is overcome by smoothing the given speed with tracking-differentiator, and the response capability of the system is improved. The second order extended state observer is introduced to estimate and compensate the external disturbance and improve the anti-interference ability of the system. Through nonlinear state error feedback control law, the nonlinear control of "small error with large gain, large error with small gain" is used to improve the control precision of the system. Simulation results show that the system has the characteristics of fast response, no overshoot, strong ability to resist load disturbance, and strong robustness to load change and speed change, which verifies the effectiveness of the strategy.
作者
匡萃璋
汪华章
Kuang Cuizhang;Wang Huazhang(School of Electrical Engineering,Southwest Minzu University,Chengdu 610041,China)
出处
《电子测量技术》
北大核心
2022年第8期35-40,共6页
Electronic Measurement Technology
基金
西南民族大学中央高校基本科研业务费专项资金(2021101)项目资助。
关键词
永磁同步电机
自抗扰控制器
速度控制
速度-电流双闭环
permanent magnet synchronous motor
active disturbance rejection controller
speed control
velocity-current double closed loop
