数控加工中激光探头的步进电机高精度控制模型仿真

High Precision Control Model simulation of Laser Probe Stepper Motor in NC Machining

数控加工中激光探头的步进电机控制精度要求较高,传统方法对步进电机控制方法采用模糊PID控制设计方法,由于数控加工中激光探头的约束参量较多,模糊PID控制中对参数的自适应调整能力不足,导致控制精度不高。在传统的模糊PID控制器的基础上,提出一种基于电机转矩误差自适应反馈补偿的步进电机高精度控制模型,电机控制系统主要是由感知系统、驱动器和执行器组成。给出控制约束参量模型,通过自适应反馈跟踪,得到步进电机的稳态误差的抵消输出的功率损耗,设计控制目标函数,采用电机转矩误差自适应反馈补偿实现对步进电机的高精度控制,降低控制误差。仿真结果表明,该控制模型在进行步进电机控制中,输出的振荡误差较小,控制精度较高,性能稳定。

The stepper motor of laser probe in NC roaching requre high control precision, traditional methods of stepper motor control method based on Fuzzy PID control method, due to the laser probe for NC machining has many constrained parameters, due to the poor doility of adaptioe adjustment for paraments in fuzzy PID control, the control accuracy is not high. On the basis of traditional fuzzy PID controller, put forward a kind of step motor control precision model based on motor torque error adaptive feedback compensation, motor control system is mainly composed of sens- ing system, driver and actuator. Given control constraint parameter model, through adaptive feedback tracking, obtain the power loss stepper motor in steady state error to compensate the output, design the control objective function using motor torque error adaptive feedback compensation to achieve high precision stepper motor control, reduces the error. The simulation results show that the control model in the stepper motor control, the output of the oscillation error is small, has high control precision and stable performance.