无刷直流电机滑模变结构控制策略研究

Strategic Study on Sliding Mode Variable Structure Control of BLDCM

为了克服无刷直流电机控制系统中传统的PID控制策略所暴露出的鲁棒性差等缺点,提出了具有快速响应能力和强鲁棒性的滑模变结构控制策略。分析了无刷直流电机的数学模型,将滑模变结构原理应用于无刷直流电机控制系统的速度环节,设计出滑模变结构控制策略,并与传统的PID控制策略进行对比分析,前者在控制性能上展现出极大的优势。仿真试验表明,该滑模变结构控制策略具有较快的响应速度、较强的抗负载扰动能力等优势,提高了无刷直流电机的鲁棒性,从而验证了滑模变结构控制策略的有效性。

In order to overcome the shortcomings such as poor robustness of the traditional PID control strategy in the control system of the BLDCM,a variable structure control strategy with fast response ability and strong robustness is proposed. In this paper,the mathematical model of BLDCM is analyzed, and the principle of sliding mode variable structure is applied to the speed control system of BLDCM. The sliding mode variable structure control strategy is designed and compared with the traditional PID control strategy;the former shows a great advantage in the control performance. Simulation tests show that the sliding mode variable structure control strategy has advantages of faster response speed, strong anti-disturbance ability,and improve the robustness of the BLDCM,which verifies the validity of sliding mode variable structure control strategy.