星载光谱仪摆臂系统的变结构空间抗扰控制  

Disturbance suppression for swing arm in spaceborne spectrograph via variable structure control

作　　者：施宇锋[1] 周纯杰[1] 秦元庆[1] 王永骥[1] 

机构地区：[1]华中科技大学控制科学与工程系,武汉430074

出　　处：《控制与决策》2011年第12期1872-1876,共5页Control and Decision

基　　金：国家自然科学基金重点项目(60834002);国家自然科学基金项目(61074145)

摘　　要：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.For the swing arm control of high precision spaceborne spectrograph, an integral sliding mode variable structure control（ISMVSC） is presented to deal with the disturbance problems of micro-gravity and micro-vibration. Firstly, the interference model of micro-gravity and micro-vibration on the swing arm is given. Then, according to the stability requirements of the optical path difference velocity（OPDV）, the control method for the swing arm is designed based on the nonlinear relationship between the motor＇s angular velocity and its OPDV. Finally, the performance of disturbance suppression for the swing arm system is simulated. Compared with the conventional PI control method, the simulation results show that the proposed ISMVSC is effective for guaranteeing the system＇s robustness and inhibiting the disturbance introduced by the micro-gravity and micro-vibration in space.

关 键 词：摆臂系统 微重力 微振动:积分滑模变结构控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]