Analysis and experimental study on dynamic behavior of permanent magnet synchronous motor in driving flexible solar array

The rotational instability of the flexible solar array will lead to the instability of satellite attitude and affect the imaging accuracy of high-resolution remote sensing satellite payload. In this article, the dynamic behavior of the permanent magnet synchronous motor in driving the flexible solar array is studied. The equation of the permanent magnet synchronous motor driven by the microstep driving method is simplified by coordinate transformation and linearization. The dynamic model of the permanent magnet synchronous motor in driving the flexible solar array is established by the fixed-interface mode synthesis method. According to the classical control theory, a method to determine the control parameters is presented. The dynamic model and the method are demonstrated by simulation and experiment. The results show that the predicted frequency error of the dynamic model of the flexible solar array driven by the permanent magnet synchronous motor is less than 5.5%, and the amplitude error of the corresponding frequency is less than 9.7%. The method of determining control parameters is effective and feasible, which provides effective support for engineering practice.