自适应变步长BP算法及转速辨识控制

基于反电动势估算的ANN速度辨识模型,采用转子磁场定向的矢量控制方法,构建了一个无速度传感器异步电机调速系统。在保证反电动势误差函数能量最小的前提下,提出了自适应变步长BP算法,加快了收敛速度,缩短了调节时间。系统实验结果表明:速度辨识精度高,系统稳定性好,且具有良好的静、动态性能。

Adaptive Variable Step-Size BP Algorithm and Speed Identification Control

Based on ANN speed identification model estimated by counter electromotive force,an adjustable-speed system of speed sensorless induction motor is designed by method of vector control of magnetic field orientation.To make the energy of error function of counter electromotive force least,an adaptive variable step-size BP algorithm is put forward to quicken the convergence speed and shorten conditioning time.The experimental result shows that this system has the advantages of exact speed identification and good stability.It has both good dynamic and static performance.