| 宏观机敏机构的振动主动控制 |
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| 引用本文： | 宋轶民,张策,余跃庆.宏观机敏机构的振动主动控制[J].中国航空学报,2005,18(3):273-278. |
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| 作者姓名： | 宋轶民 张策 余跃庆 |
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| 作者单位： | [1]School of Mechanical Engineering, Tianjin University, Tianjin 300072, China [2]School of Mechanical Engineering, Beijing Polytechnic University, Beijing 100022, China |
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| 基金项目： | Foundation item： National Natural Science Foundation of China （59675004, 59975001, 50205019） |
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| 摘 要： | 研究了具有压电作动器与应变传感器的柔性连杆机构的振动主动控制问题。应用复模态理论对宏观机敏机构的动力学方程进行解耦，建立了包含系统噪声与观测噪声的受控系统状态空间表达式，并分别设计了离散LQG状态反馈控制器与离散Kalma。滤波器。宏观机敏机构的在线振动控制实验表明，柔性连杆的应变峰值降低了80％，机构的动力学性能得到了显著改善。
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| 关 键 词： | 柔性连杆机构 振动主动控制 机敏材料 复模态 随机最优控制 |
| 收稿时间： | 04 4 2005 12:00AM |
| 修稿时间： | 06 25 2005 12:00AM |
Active Vibration Control of Macroscopically Smart Mechanisms |
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| SONG Yi-min,ZHANG Ce,YU Yue-qing.Active Vibration Control of Macroscopically Smart Mechanisms[J].Chinese Journal of Aeronautics,2005,18(3):273-278. |
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| Authors: | SONG Yi-min ZHANG Ce YU Yue-qing |
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| Institution: | Tianjin University;Tianjin University |
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| Abstract: | This paper presents an investigation on the active vibration control of flexible linkage mechanisms featuring piezoceramic actuators and strain gauge sensors. The dynamic equation of the macroscopically smart mechanism is decoupled by means of the complex mode theory. The state-space expression of the controlled system is developed, which includes the system noise and the observation noise. Moreover, a discrete linear quadratic Gaussian (LQG) state feedback controller and a discrete Kalman filter are designed separately. Finally, the proposed method is applied to the on-line vibration control of a macroscopically smart mechanism. The experimental results reveal that the strain amplitude of the flexible link is suppressed by 80% and the dynamic performance of mechanism has been ameliorated significantly. |
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| Keywords: | flexible linkage mechanisms active vibration control smart material complex mode stochastic optimal control |
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