基于滑模MRAS速度估计的感应电机无传感器控制

滑模模型参考自适应控制系统是基于传统的模型参考自适应控制思想，利用滑模控制器的良好特性而形成的一种新的控制方法。在矢量控制算法的基础上，结合感应电机这一非线性控制对象，设计了滑模MRAS速度观测器。该观测器具有传统的MRAS构架，将反馈机制采用滑模控制器代替，针对MRAS速度估计精度受定子阻抗影响的不足，设计了定子阻抗自整定算法，以达到快速响应对象参数和状态变化的目的，仿真结果表明：该控制系统运行平稳，具有良好的动、静态性能。

Speed Sensor-less Control of Induction Motors Based on Sliding-Mode MRAS Speed Estimation

The induction motor(IM) is a multi-variable, nonlinear and highly coupled system,according to the mathematical equations of IM,a sliding-mode(SM) model reference adaptive system(MRAS) observer for speed estimation in the sensor-less vector controlled induction motor system was proposed.The frame of the classic MRAS was adopted,a SM observer was used to as the feedback mechanism, and a scheme was discussed to avoid the pure integrators and a robust controller was proposed to adapt stator resistance variations.The proposed estimator was very robust and easy to tune to compare with the classical MRAS.The simulation results showed the validity of the developed methodologies.