Transverse vibration control of an axially moving beam system with time varying mass

被引：0
|
作者：
Ma C.-C. [1 ,2 ]
Zhang X.-N. [2 ]
Dai X.-J. [1 ]
Zhou C.-C. [1 ]
Guo Z.-H. [1 ]
机构：
[1] School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo
[2] State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 03期
关键词：
Active vibration control; Axially moving beam; LQG; Variable mass;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.03.003
中图分类号：
学科分类号：
摘要：
Axially moving structures are widely used as basic components in kinds of delivery systems. It is very common that mass changing or mass moving occurs in the process of delivery, which causes the increase or decrease of the total mass. The coupling of variation of the mass and the axially moving makes more significant vibration of the structures. This paper studies the active vibration control of the axially moving structures with time varying mass by taking an axially moving manipulator attached with a time varying concentrated mass as a specific subject. The governing equations of the time varying system are derived using Galerkin method and mode superposition method. Then LQG controller is designed for controlling the vibration of the system with different conditions taken into account, including the increasing mass system and the decreasing mass system. Finally, the response signals are decomposed by the method of Choi Williams distribution, and the time frequency features are obtained. Numerical simulations demonstrate that the vibration of the system is effectively controlled under the LQG controller in the limited range of frequencies, and the variation of the frequency and vibration energy can be given by Choi Williams distribution, showing that it is a much more powerful tool than FFT. The study on the dynamic characteristics and active control of the axially moving structures with time varying mass can offer guides to innovative design of smart manipulators. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：396 / 403
页数：7
相关论文
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