智能结构应用于船体振动控制的研究

Study on Application of Intelligent Structure to Controlling Vibr ation of Ship Structure

本文从机电耦合弹性体的理论出发 ,运用Hamilton原理建立一般机电耦合系统的动力分析模型 ,并推导出有限元分析的耦合系统方程、作动方程及检测方程。以此为基础进行压电控制系统设计。应用LQG算法对简化舱段船壳的振动控制表明 ,增大结构的阻尼 ,使结构的振动降低 ,有效地控制结构振动。

In the paper, by means of the electromechanical coupled e lastic mechanics theory and Hamilton principle, a dynamic analysis model of a general electromechanical coupled syst em is established, and the finite element equations of the coupled system, actuator equation and piezoeIectric se nsor equation are derived. Based on these equations, a piezoelectric control system is designed. Application of LQG algorithm to controlling vibration of the hull of a simplified space section shows that structure vibrat ion can be reduced by means of increasing structure damping and so can be contr olled effectively.