带有干扰的挠性卫星非线性姿态输出反馈控制

针对挠性卫星在飞行过程中存在参数不确定性、干扰（常值扰动和正弦扰动）及挠性附件的振动控制问题，提出了一类基于输出反馈控制系统的鲁棒设计方法，该设计仅利用姿态四元数输出信息，而无需角速度、挠性变形位移及其速率测量信息；同时，在控制中又引入积分环节用于减小常值干扰引起的稳态误差，并且控制器参数的选者并不依赖于系统参数，基于Lyapunov理论证明了所设计的控制器保证了姿态的稳定和模态振动的衰减；最后，将该方法应用于挠性卫星的姿态机动控制，仿真结果表明该控制器不仅对参数不确定性具有很好的鲁棒性，而且能够有效消除常值干扰和正弦干扰的影响，在完成姿态机动控制的同时，能够抑制挠性附件的结构振动，具有良好的过渡过程品质．

Nonlinear attitude output feedback control for flexible satellite under bounded disturbances

An angular velocity-free attitude control system is designed for an orbiting three-axis stabilized satellite with flexible appendages,which took into account parametric uncertainties and external disturbances (constant and periodic ones). The designed controller,incorporates a low-pass linear filter,which is derived without explicit differentiation of attitude to synthesize angular velocity-like signals. Moreover,an integral feedback of the attitude was explicitly included to compensate the constant disturb...