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由控制力矩陀螺群构成的姿态控制系统是目前敏捷卫星实现姿态快速机动和精确控制的最佳选择,而低速框架的控制精度、响应速度与稳定性直接决定了控制力矩陀螺的工作性能.针对敏捷卫星对控制力矩陀螺工作性能的高要求,本文提出了一种框架的高性能控制方案——基于永磁同步电机及磁场定向控制算法,并结合框架角速度观测器的直接驱动控制方案.在框架角速度极低时,为解决角度传感器的分辨率无法满足控制精度要求的问题,引入Luenberger状态观测器获得框架角速度的观测值,并将该观测值引入框架角速度闭环控制系统.理论分析、仿真实验的结果证明了该方案的有效性.随后,针对电机参数漂移对观测值的影响进行了仿真分析,仿真结果证明了基于观测器的角速度闭环控制系统的鲁棒性.
Attitude control system composed of control moment gyroscope group is the best choice for agile satellite to achieve rapid maneuver and precise control of attitude, while the control precision, response speed and stability of low-speed frame directly determine the performance of control moment gyroscope. Satellites to high performance requirements of control moment gyroscope, this paper presents a framework of high performance control scheme based on permanent magnet synchronous motor and magnetic field orientation control algorithm, combined with frame angular velocity observer direct drive control scheme in the framework of angular velocity In order to solve the problem that the resolution of the angle sensor can not meet the requirement of control precision, the Luenberger state observer is used to obtain the observed value of the angular velocity of the frame, and the result is introduced into the frame angular velocity closed-loop control system. The validity of this scheme is proved.And then, the influence of the motor parameter drift on the observed value is simulated and analyzed, and the simulation results prove the robustness of the observer-based angular velocity closed-loop control system.