挠性空间结构振动的独立模态空间最优控制方法

针对大型挠性空间结构的特性，考虑在独立模态空间内进行控制，设计模态滤波器，对从物理空间采集到的模态信息进行预滤波处理；设计模态观测器，从模态加速度中获取模态位移和模态速度；其次，利用独立模态空间理论中各阶模态相互独立解耦的特性，设计了基于最优控制的独立模态空间控制器；在此基础上，考虑外部干扰信号作用下，设计了基于模态滤波器的 次优控制器，构成了一个完整的挠性空间结构闭环主动振动控制系统。对简化的桁架和单翼帆板结构振动控制进行了仿真验证，结果表明：两种控制器均能使振动得到有效抑制，相比传统比例积分微分控制器最大振幅减小约一半，且具有一定的抗干扰能力。

Independent Modal Space Optimal Control Method for Vibration of Flexible Space Structures

For the characteristics of large flexible space structures, considering controlling in independent modal space, a modal filter is designed to pre-filter the modal information collected from the physical space; a modal observer is designed to obtain modal displacement and modal velocity from modal acceleration. Secondly, using the characteristics of independent decoupling of each mode in independent modal space theory, an independent modal space controller based on optimal control is designed. On this basis, considering the external interference signal, a suboptimal controller based on modal filter is designed to form a complete closed-loop active vibration control system for flexible space structure. The simplified vibration control of truss and monoplane panel is verified by simulation. The results show that both controllers can effectively suppress the vibration, and the maximum amplitude is reduced by about half compared with traditional proportional integral differentiation controller, and it has certain anti-interference ability.