基于特征模型的压电悬臂板振动控制  

Vibration Control for Flexible Smart Cantilever Plate Based on Characteristic Model

作　　者：邱志成[1] 吴宏鑫[2] 

机构地区：[1]华南理工大学机械工程学院,广州510641 [2]中国空间技术研究院北京控制工程研究所,北京100080

出　　处：《机械工程学报》2008年第10期187-195,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金(60404020;90505014);广东省自然科学基金(05006499)资助项目。

摘　　要：航天器上悬臂板型挠性附件在扰动作用下将引起包括弯曲和扭转模态的振动,这将影响系统的稳定性和控制精度,尤其是在平衡点附近低频模态频率上的小幅值残余振动很难快速抑制。为了快速抑制压电智能挠性悬臂板系统,包括弯曲和扭转模态的振动,提出采用基于特征模型的非线性黄金分割自适应控制,组合非线性切换逻辑积分阻尼器算法。首先,优化配置压电传感器和驱动器实现了悬臂板的弯曲和扭转模态在检测和驱动上的解耦;其次,设计并建立压电挠性悬臂板试验平台,进行试验模态辨识并获得了悬臂板系统弯曲和扭转振动的模态频率和频响特性;最后,进行压电智能悬臂板的弯曲和扭转振动模态主动振动几种方法试验的比较研究。试验结果表明,采用的控制方法能够快速地抑制压电智能挠性悬臂板的振动。The vibration problem of spacecrafts＇ flexible appendages shaped as cantilever plate will be unavoidable when external disturbance excitation happens, including bending and torsional mode vibration and which will affect the stability and control accuracy of the system. Especially the lower amplitude modal residual vibration near the equilibrium point is hard to be suppressed. To solve this problem, nonlinear golden section adaptive control based on characteristic model and combined with non-linear switched logic integral damping algorithm is adopted to suppress the said vibration of cantilever plate quickly. Firstly, decoupling of bending and torsional modes is realized by optimal placement of piezoelectric sensors and actuators. Secondly, the piezoelectric smart cantilever plate is designed and built up, and the modal frequencies and frequency responses of bending and torsional modes are obtained by experimental identifications. Finally, several control methods are used to develop the experimental comparison researches for attenuating the bending and torsional mode vibration of the plate. The experimental results demonstrate that the adopted methods can suppress the vibration of cantilever plate quickly.

关 键 词：压电悬臂板 振动主动控制 特征模型 非线性黄金分割 

分 类 号：TP241[自动化与计算机技术—检测技术与自动化装置]