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针对高精密星载光谱仪摆臂系统的空间微重力、微振动抗扰问题,提出一种积分滑模变结构控制策略.首先给出了空间微重力、微振动对摆臂系统的干扰模型;然后,根据系统对光程差速度的控制要求以及与电机角速度的非线性关系,给出了积分滑模变结构控制的设计方法;最后,将所提出的控制方法与PI调节控制进行抗干扰对比仿真,所得结果表明,该方法能有效抑制空间微重力、微振动等引起的扰动,保证系统的鲁棒性.
In order to solve the problem of micro-gravity and micro-vibration in the swing arm system of high-precision spaceborne spectrometer, an integral sliding mode variable structure control strategy is proposed. Firstly, the interference model of micro-gravity and micro-vibration on the swing arm system is presented. , The design method of integral sliding mode variable structure control is given according to the system’s control requirements of optical path difference velocity and its non-linear relationship with the angular velocity of motor. Finally, the proposed control method is compared with the PI regulation control to simulate the anti-interference The results show that this method can effectively restrain the disturbance caused by micro-gravity and micro-vibration, and ensure the robustness of the system.