分支电路压电阻尼减振技术的电路参数优化  

Parameter Optimization of Piezoelectric Damping Vibration Technology with Shunted Circuits

作　　者：杨长洲[1] 童昕[1] 黄庆专[1] 刘俊[1] 

机构地区：[1]华侨大学机电及自动化学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2007年第4期341-344,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(E0510020)

摘　　要：通过建立半主动压电可控悬臂梁有限元模型,进一步采用精细时程积分法求解各节点的挠度和转角.以分支电路中电感和电阻值为设计变量,梁有限元模型动端点处节点位移振幅为目标函数,使用遗传算法优化电路中的电感和电阻,得到不同激励频率下分支电路的最优参数值.优化结果表明,当电感和电阻为最优值时,动端点的振幅都比其他情况下的振幅小;当激励频率和分支电路谐振频率相等时,动端点振幅并不是最小的,即最优电感比谐振频率下的电感值小.This paper sets up a finite element model of the cantilever beam of semi-active vibration control using piezoelectric, then solves the model in precise time step integration method. Taking the inductance and resistance of shunted circuit as design variables and the amplitude of the displacement of the last move node of the cantilever beam as target value, we obtain the different optimum shunted circuit＇s parameters in different motivation frequencies using modified genetic algorithm. The optimum results show that the displacement of the last move node of the cantilever beam within the optimum inductance and resistance is lower than that without these. When incentive frequency equals to shunted circuit＇s resonant frequency, the displacement of the last move node is not the lowest, in other words, the optimum inductance is lower than resonant inductance.

关 键 词：半主动压电阻尼 振动控制 有限元 分支电路 悬臂梁结构 遗传算法 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TM135[自动化与计算机技术—控制科学与工程]