Micro-vibration active control for a Stewart platform with a cubic configuration

被引：0
|
作者：
Wang C. [1 ,2 ]
Liu X. [3 ]
Zhang Z. [1 ,2 ]
机构：
[1] Institute of Vibration, Shock and Noise, Shanghai Jiao Tong University, Shanghai
[2] State Key Laboratory of Mechanical Systems and Vibration, Shanghai Jiao Tong University, Shanghai
[3] Institute of Satellite Engineering in Shanghai, Shanghai
来源：
Zhang, Zhiyi | 2017年 / Chinese Vibration Engineering Society卷 / 36期
关键词：
Active isolation; Fx-LMS; Jacobian matrix; Micro-vibration; Stewart platform with a cubic configuration;
D O I：
10.13465/j.cnki.jvs.2017.05.033
中图分类号：
学科分类号：
摘要：
A Stewart platform with a cubic configuration was developed having uniformity of stiffness and a control capability in all directions, and a simplified mechanical design. Its kinematic and dynamic analyses were conducted to obtain Jacobian matrix relating the extension of the piezo actuator to 6-DOF of the top plate and to reveal its characteristics of vibration transmissibility. Taking a piezoelectric stack as an active control element, the platform was designed. Tests were performed to measure the output characteristics of the active bar of the platform within the frequency band of 5 Hz to 120 Hz and Jacobian matrix obtained with theoretical analysis was modified with test data. Fx-LMS algorithm was adopted to actively suppress the foundation disturbances. The results showed that within the range of 5 Hz to 120 Hz, the platform is able to achieve 30 dB attenuation effect under a single frequency disturbance. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：208 / 213
页数：5
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