摘要
为了消除步进电机在开环控制时系统抗扰动能力差,易受电机参数摄动影响及失步的问题。由于传统加入编码器检测控制的方法,不能够解决系统稳定性与可靠性的问题。文中根据滑模变结构控制原理,针对两相混合式步进电机的数学模型,设计一个滑模控制器来实现步进电机的无位置传感器的闭环控制。仿真实验结果表明,与传统闭环控制相比,有效防止了步进电机突加负载而造成的失步,系统的动态性能明显改善,且具有对电机参数不敏感及抗扰动能力强等特点。
In order to eliminate problems of poor anti-disturbance performance, sensitive to parameter perturbation and even potential lose steps when step motor running in open-loop mode. Due to the traditional control method of adding encoder can not ensure the stability and reliability of the system. According to the theory of sliding mode variable structure, combined with the mathematical model of step motor,this paper designs a sliding mode controller of step motor to implement closed-loop sensorless control. The experimental results demonstrate that, compared with the traditional closed-loop control, the step motor control system can effectively prevent lose steps caused by the sudden load c improving the dynamic performance of the system and ability to resist disturbance, lower sensitive parameters. hanging to motor parameters.
出处
《信息技术》
2015年第1期117-120,共4页
Information Technology
关键词
步进电机
失步
滑模控制
无位置传感器
stepper motor
lose steps
sliding mode control
sensorless
