【作者】 高伟；

【导师】 陈建军；

【作者基本信息】 西安电子科技大学 ， 机械制造及其自动化， 2002， 硕士

【摘要】 随机参数压电智能桁架结构振动主动控制是目前结构设计与控制研究领域中的重要课题。本文针对随机参数压电智能桁架结构开展了结构动力分析、主动杆优化配置和结构振动主动控制研究。在考虑结构材料的物理参数(质量密度和弹性模量)为随机变量的情况下，对结构进行了基于概率的动力特性分析；在考虑结构材料的物理参数、外加荷载和闭环控制力均为随机变量的情况下，对结构进行了动力响应分析。以直接输出速度反馈作为闭环控制律，基于最大耗散能准则，建立了以主动杆配置位置和控制系统增益为设计变量，具有动力响应(应力响应和位移响应)可靠性约束的压电智能桁架结构主动杆优化配置的数学模型。最后，通过数值算例验证了文中建立的动力特性分析模型、动力响应分析模型和主动杆优化配置模型的正确性及可行性；通过计算机仿真，表明了对结构振动主动控制的有效性。更多还原

【Abstract】 Active vibration control for piezoelectric intelligent truss structures with random parameters is an important task in the field of engineering structural research, study and control today. In this paper, the research of structural dynamic analysis, the optimization of active bars placement and the active vibration control for piezoelectric structure are studied. Considering the randomness of physics parameters of structural material (mass density and elastic module), the problem of the structural dynamic characteristic analysis based on probability is studied. The problems of dynamic response analysis of closed loop control system based on reliability for the intelligent truss structures with random parameters were studied, in which the randomness of physics parameters of structural material and applied loads and control forces are considered. Firstly, for the intelligent structure’s active bars, a constant output velocity feedback control law is dissipation energy due to control action and the optimal mathematical model with the reliability constraints on dynamic stress and displacement was built. Several numerical examples are present to illustrate the correctness and practicability of model of dynamic characteristic analysis, dynamic response analysis and optimization of active bars’ location built in this paper. The validity of active vibration control for piezoelectric structure with random parameters is demonstrated by means of the computer simulation. And some significant conclusions and results are obtained.更多还原