改进型滑模扰动观测器的感应电机控制系统

针对传统PI调节器在负载剧烈突变时控制性能不佳及使用传统滑模观测器抖振严重的问题,文中以感应电机为研究对象,提出了一种基于滑模观测器和传统PI调节器的扰动实时补偿方案。通过改进型的扰动观测器对系统扰动进行实时观测估算,将估算出的扰动反馈至PI调节器进行前馈补偿,从而有效提高电机控制性能,改善抖振现象。文中搭建了基于MATLAB的仿真平台和TMS320F28335 DSP的实验平台,对所研究的改进滑模观测器扰动前馈补偿方法与常规单PI调节、常规滑模观测器扰动补偿进行了对比分析。该结果验证了所提方案的有效性与可行性,速度超调量优化了0.5%,响应时间为30 ms。

Research on Induction Motor Control Based on Improved Sliding Mode Disturbance Observer

In view of the poor control performance of traditional PI regulators when the load is drastically changed, and the use of traditional sliding mode observers has serious chattering problems, taking induction motors as the research object, a real-time disturbance compensation scheme based on sliding mode observer and traditional PI regulator is proposed in this study. The system disturbance is observed and estimated in real time through the improved disturbance observer, and the estimated disturbance is fed back to the PI regulator for feedforward compensation, thereby effectively improving the motor control performance and improving the chattering phenomenon. A simulation platform based on MATLAB and an experimental platform of TMS320F28335 DSP are established, and the improved sliding mode observer disturbance feedforward compensation method is compared with conventional single PI adjustment and conventional sliding mode observer disturbance compensation. The experimental results show that the speed overshoot is optimized by 0.5%, and the response time is 30 ms, which verifies the effectiveness and feasibility of the proposed scheme.