基于扩张状态观测器和有限时间控制的感应电机直接转矩控制

摘要

对感应电机直接转矩控制系统中存在的干扰，本文结合扩张状态观测器(ESO)和有限时间控制(FTC)提出一种复合控制方法来提高系统的抗干扰能力。首先采用扩张状态观测器估算系统的扰动，用此观测值作为前馈量补偿到输入端；然后运用连续有限时间控制方法设计系统前向通道中的反馈控制器。文中对控制器的稳定性进行了证明。与传统的PI控制以及P+ESO控制方法进行仿真与实验结果比较，验证了方法的有效性。%Existing disturbances in the direct torque control of induction motor drive system, we proposes a composite control scheme based on extended state observer (ESO) and the continuous finite time control (FTC) to improve the dis-turbance rejection property of the system;the estimated value is used in the feedforward compensation design. Secondly, a continuous feedback-based finite-time control technique is applied to the feedback design. Then, the stability of the con-troller is analyzed. Simulation and experimental comparisons with other two methods, traditional PI and P+ESO, are given to validate the effectiveness of the proposed method.