为了提高非圆车削中快速伺服刀架的跟踪精度和抗干扰性,研制了一种自抗扰控制器。通过对执行机构建模分析,将模型中的非线性部分归结为系统的内扰,将加工过程中切削力干扰归结为系统外扰,设计出相应的扩张状态观测器,对系统内、外扰的总和做出实时估计和补偿。仿真实验表明,自抗扰控制性能优于传统的PID控制。通过DSP(digital signal processor)编程,将自抗扰控制器应用于非圆车削。切削加工试验结果表明,自抗扰控制具有良好的控制品质,快速伺服刀架跟踪精度控制在±5μm以内。 In order to improve the tracking accuracy and anti-interference of the fast servo turret in non-circular turning, a self-disturbance rejection controller is developed. By modeling the actuator, the non-linear part of the model is attributed to the internal disturbance of the system. The cutting force disturbance in the machining process is reduced to the system external disturbance, and the corresponding extended state observer is designed. Make a real-time estimate of the sum of compensation. Simulation results show that ADRC performance is better than traditional PID control. Through the DSP (digital signal processor) programming, the ADRC controller is applied to non-circular turning. Cutting test results show that ADRC has good control quality, fast servo turret tracking accuracy control within ± 5μm.