BLDCM的积分自适应全局滑模控制

Adaptive Global Sliding Mode Control for Brushless DC Motor

在无刷直流电机精度优化控制问题的研究中,由于无刷直流电机是一种多变量,非线性的控制系统,传统的PID控制策略很难达到高精度控制。提出了一种新型的积分自适应全局滑模控制器,解决了传统的滑模变结构控制存在的鲁棒性只有到达滑动模态时才能体现的缺点,同时减小了当状态轨迹到达滑模面后在滑模面的两侧做穿越运动而产生的抖振。积分项的加入减小了调速系统中明显的速度静差。自适应控制思想的加入解决了干扰上界难以确定的问题,进一步削弱了系统的抖振。通过仿真结果表明,改进控制策略应用到无刷直流电机上,使系统具有响应速度快、超调小、鲁棒性强等优点。

Brushless DC motor is a multi-variable, non-linear control system. Classic PID control strategy is dif- ficuh to achieve high-precision control. This paper proposes a novel adaptive global integral sliding mode controller. Itolve the traditional sliding mode variable structure control. It can also reduce the buffeting when moving through the sides the state trajectory after reaches the sliding surface. Adding the integral term the governor system, adaptive control the upper bound of the interference urtherweaken. The control strategy is applied to a brushless DC motor, and the simulation results show that the proposed control strategy makes the brushless DC motor speed control system with fast response, small overshoot, and strong robustness.