加速度传感器具有频带宽、结构简单、重量轻等优点而获得了广泛使用 ,因此研究基于加速度测量的结构控制系统具有较大的实用价值。文中在只能获得加速度时 ,采用模态滤波器技术实现从物理加速度响应解耦得到单模态加速度响应。然后改变 L uenberger观测器的结构形式 ,从模态加速度响应观测得到模态位移和模态速度响应。基于模态滤波器和最优控制理论 ,采用独立模态空间控制策略 ,实现了具有密集模态的三维柔性智能桁架结构的振动主动控制。实时计算机控制仿真结果表明这种控制策略是有效的 Acceleration sensors are widely used due to their advantages of wide frequency band, simple structure and light weight. Therefore, it is of great practical value to study the structure control system based on acceleration measurement. In this paper, modal filter technology can be used to decouple the acceleration response from the physical acceleration response to get the single mode acceleration response when the acceleration can only be obtained. Then the structure of L uenberger observer is changed, and the modal displacement and modal velocity response are obtained from the modal acceleration response observation. Based on modal filter and optimal control theory, an independent modal space control strategy is adopted to realize the active vibration control of three-dimensional flexible smart truss structure with intensive modal. Real-time computer control simulation results show that this control strategy is effective