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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 precision of the stepper motor control of the laser probe in CNC machining is relatively high. The traditional method uses the fuzzy PID control design method for the stepper motor control method. Because of the constraint parameters of the laser probe in the NC machining, To adapt to the lack of ability to adjust, resulting in low control accuracy. Based on the traditional fuzzy PID controller, a high precision control model of stepping motor based on the adaptive feedback compensation of motor torque error is proposed. The motor control system is mainly composed of the sensing system, driver and actuator. The parameters of the control constraint are given. The power loss of the steady-state error of the stepping motor is compensated by adaptive feedback tracking. The objective function of the control is designed. Adaptive feedback compensation of the motor torque error is used to realize high precision of the stepping motor Control, reduce control error. Simulation results show that the control model in the stepper motor control, the output of the smaller oscillation error, higher control accuracy, stable performance.