Design Of Attitude Control Flyweel System Based On Micro-Planar Motor

Flywheel system is commonly used in satellite attitude control system as the implementing agencies.The volumes and masses of the general DC brushless motor are too large to be used on micro/nano satellite. This paper adopts micro-planar Permanent Magnetic Brushless DC Motor (PMBLDCM) as the drive motor of flywheel system. Focused on process of entity design, the reliability test, simulation analysis, the windings improvement and experimental research, attitude control flywheel system was studied systematically. The main work of this paper are as follows:The principle of the flywheel system for attitude adjustment was researched and given, the overall structure of the flywheel system was designed, the magnetic circuit of the attitude control flywheel system was introduced, and the relevant parameters of the magnetic circuit was designed. After selecting the full bridge circuit as the drive circuit and the designing parameters of the stator and the winding, the entire design work of attitude control flywheel system was done.According to the statics simulation analysis and modal analysis of the attitude control flywheel system based on ANSYS, the security of the design was tested. According to the design parameters, the relevant parameters of the flywheel system were calculated, and then the mechanical properties of the flywheel system were simulated. After getting the operating characters, the loss of attitude control flywheel system was calculated with the simulation data. Most of these losses ultimately converted to heat, so the thermal analysis was done. The temperature rise value of the flywheel system was simulated and the value was in the safe range. After the above simulation and calculation, the reasonableness of the design process was preliminary verified.The shape of the windings was re-designed because the reverse torque was too large. The prototype of flywheel system was manufactured with the design parameters. In the vacuum/air condition, accelerational experiments and natural spin-down experiments were done with the protype. According to the comparison of experimental datas and simulation results, the correctness of the design process was verified.