建立磁悬浮电励磁三相直线同步电机(MSEETPLSM)的连续时间参数型状态空间方程数学模型,利用前向一阶差分方法将连续时间数学模型离散化成离散时间参数型状态空间方程数学模型,再利用z变换写成递推最小二乘算法标准形式的数学模型。利用递推最小二乘算法在初级转子静止状态下辨识出MSEETPLSM的电阻及自感参数。利用计算机数值仿真软件仿真MSEETPLSM参数的离线辨识算法,得到MSEETPLSM的初级与次级电阻与电感时域辨识曲线,仿真曲线收敛速度较快且辨识精度较高。仿真结果验证了该参数离线辨识算法的有效性。

A mathematical model with continuoustime parameter state space equations was established for magnetically suspended and electrically excited threephase linear synchronous motor (MSEETPLSM). The continuoustime model was discretized into the model with discretetime parameter state space equations using the forward difference method, and then rewritten in the standard form of recursive least squares algorithm through ztransformation. The resistance and selfinductance parameters of MSEETPLSM were identified by recursive least square algorithm under the static state of the primary rotor. Simulation software was used to simulate the off line identification algorithm of MSEETPLSM parameters, and the time domain identification curves of primary and secondary resistances and inductances of MSEETPLSM were obtained. The simulation curves converged fast and the identification results showed high accuracy. The effectiveness of the off line identification algorithm of MSEETPLSM parameters is proved.

TM 383

国家自然科学基金项目(51575363)