压电智能结构振动控制中执行元件最优位置的选择

Selection of the Optimal Actuator Locations for Active Vibration Control of Piezoelectric Intelligent Structures

采用模态分析及控制理论,确定了定量度量模态对贮存在结构中能量积分贡献的方法。利用奇异值分解技术确定了定量度量模态可控程度的方法。以压电智能结构振动控制效果为目标,将两个度量指标加权结合,构造了一种新的度量压电智能结构可控程度的指标,并以此为选择压电执行元件最优位置的依据。

By using mode analysis theory and control theory, a method is proposed to measure the modes contribution to the integrated energy of the system. Using the singular value decomposition technique, the method for measuring the modal controllability is determined. In view of effectiveness of active vibration control for piezoelectric intelligent structures, a new index is developed to measure the structural controllability, which is used as the basis of selecting the optimal piezoelectric actuator locations. Finally, a numerical example is given to demonstrate the validity of the present method.