Research on Dynamics Reduction Modeling and Time Delay Problems of Elastic Vibration Active Isolation System

Song Pan; Dong Xing-jian; Meng Guang

Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (23) : 57-61.

PDF(1233 KB)
PDF(1233 KB)
Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (23) : 57-61.
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Research on Dynamics Reduction Modeling and Time Delay Problems of Elastic Vibration Active Isolation System

  • Song Pan, Dong Xing-jian, Meng Guang
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Abstract

This paper takes elastic vibration active isolation system for the object and research on the modeling and delay active control problem. Considering the flexibility of the raft and foundation, the finite element modeling of floating raft system is built. Based on the super-element dynamic condensation technology, finite element model of elastic body reduced in physical space. Taking into account the effect of actuators’ delay, the study established delay active control model and numerical analysis maximum delay of the system and the stability of controller delay. Numerical calculations show that active control is necessary to consider the delay factor in order to avoid instability, the method proposed in this paper is easy to ensure control system performance and stability.

Key words

Elastic System / Time Delay / Vibration Control / Dynamic Reduction

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Song Pan; Dong Xing-jian; Meng Guang. Research on Dynamics Reduction Modeling and Time Delay Problems of Elastic Vibration Active Isolation System [J]. Journal of Vibration and Shock, 2012, 31(23): 57-61
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