A Parameter Identification Method Based on Forgetting Factor Dynamic Adjustment for PMSM Applied to the Rapid Control of Satellite Attitude

In the vacuum environment of space, the attitude of the satellite can be adjusted by PMSM based on the law of conservation of momentum. The adjustment method of satellite attitude is that the PMSM must rotate in opposite direction quickly when the attitude of the satellite needs to be adjusted in positive direction. In order to receive the ground signals effectively or to communicate with other equipment in space reliably, it requires that the PMSM can be co-rotation and reversal frequently. Therefore, before restart, the stator inductances must be recognized quickly to estimate initial rotor position, with which, the PMSM can get large starting torque to guarantee a quick and reliable restart. This paper presents a dynamic correction method for the identification forgetting factor. With the proposed method, the convergence rate of parameter estimation is obviously accelerated, and the fluctuation of parameter estimation is obviously reduced. Finally, the inductances can be identified quickly and accurately. PMSM can achieve fast and steady forward co-rotation and reversal frequently.