柔性基础主动隔振系统的缩聚建模和时滞问题研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (23) : 57-61.

论文

柔性基础主动隔振系统的缩聚建模和时滞问题研究

宋攀董兴建孟光

作者信息 +

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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文章历史 +

摘要

以复杂柔性耦合主动隔振系统为对象，研究其动力学建模和时滞主动控制问题。考虑筏架和基础的弹性，建立浮筏系统的有限元模型，并基于超单元动力缩聚技术，把系统的有限元模型在物理空间中进行减缩。考虑作动器的时滞效应，建立系统的时滞主动控制模型，对系统的最大时滞量和控制器的时滞稳定性进行了数值研究。数值计算表明，主动控制中有必要考虑时滞因素以避免失稳，本文所提出的方法易于保证控制系统的性能和稳定性。

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.

导出引用

宋攀董兴建孟光. 柔性基础主动隔振系统的缩聚建模和时滞问题研究[J]. 振动与冲击, 2012, 31(23): 57-61

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