TIME-DELAY EFFECTS ON ACTIVELY DAMPED STRUCTURES
TIME-DELAY EFFECTS ON ACTIVELY DAMPED STRUCTURES
复制标题
DOI：
10.1061/(asce)0733-9399(1987)113:11(1709
复制
发表时间：
1987-11
期刊：
影响因子：
--
通讯作者：
M. Abdel-Rohman
中科院分区：
文献类型：
--
作者：
M. Abdel-Rohman
研究了用直接速度反馈控制的分布参数结构的时滞效应。结果表明，由于时间延迟，结构的稳定性可能会丧失。提出了两种时延补偿方法。第一种方法是考虑到时滞的存在，重新设计增益矩阵。然而，在这种情况下，当使用控制力矩作为控制动作时，结构可能保持不稳定。另一种方法是使用低通滤波器从高阶模态的频率分量中过滤速度测量值。在这种情况下，可以控制和补偿时间延迟的振动模式的数量相当于控制动作的数量。然而，高阶模仍然不受控制。
This paper shows the time-delay effect on the distributed parameters structures controlled using direct velocity feedback. It is shown how the stability of the structure could be lost due to time delay. Two ways of time-delay compensation are suggested. The first way is to redesign the gain matirx considering the presence of the time delay. In this case, however, the structure could remain unstable when using control moments as control actions. The other way is to use low-pass filters to filter the velocity measurements from the frequency components of the high order modes. In this case, one can control and compensate for time delay a number of vibrational modes equivalent to the number of control actions. However, the higher order modes remain uncontrolled.