陈广国

为了满足永磁同步电动机（PMSM）伺服系统快速性和鲁棒性的要求，抑制外部扰动和参数变化对系统性能的影响，提出一种基于时变扩张状态观测器的改进型滑模控制方法(DOMSMC)。首先，建立含有转矩扰动的PMSM的数学模型。然后，建立时变扩张状态观测器，实时观测PMSM所受到的扰动，并提供一个观测值来控制输入。同时，采用基于改进型趋近率的滑模控制方法来提高转速收敛的快速性，且抑制抖振。利用Lyapunov定理对控制系统的稳定性进行了分析验证。最后，通过实验验证了该方法有效地提高了收敛速度，同时明显地抑制了负载转矩扰动对系统性能的影响。

永磁同步电机；时变扩张状态观测器；改进型趋近率；抖振

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