柔性智能桁架结构的独立模态空间控制方法实验研究

摘要

Active vibration control of flexible space intelligent truss structures is explored in the paper based on Indepent Modal Space Control(IMSC) technique and optimal control theory. A space intelligent truss structure with low and closely spaced frequencies is developed. Then with acceleration measurements and the modal filter which is implemented on the basis of the experimental modal analysis theory, the modal acceleration response can be extracted. To observe modal displacement and modal velocity from modal acceleration, the Leunberger observer is modified. The real-time computer-controlled experiments are carried out. The experimental results show that the modal damp rates increase, and the amplitudes of frequency response function decrease. The control strategy is effective.%针对空间柔性智能桁架结构，进行了实验室控制仿真。实验基于最优控制理论，采用独立模态空间控制方法设计了空间柔性智能桁架结构的振动主动控制规律。通过测量加速度，进行了柔性智能桁架结构的实时振动主动控制实验。实验结果表明该控制使被控模态阻尼比增加，频响函数的幅值衰减较大，有较明显的控制效果。