【摘要】 提升作动器效率是风洞模型主动减振系统结构设计的首要目标。基于风洞试验、地面模态试验及有限元分析，提取了高速风洞模型尾支撑结构振动特征及振动控制过程中各部件的运动、变形模式，建立了简化的动力学-控制耦合模型，发展了适用于主动减振结构设计的作动器效率表征方法。以双弹性铰链形式的典型主动减振结构为对象，从一组标称设计参数出发，研究作动器效率对弹性铰链的几何、位置及刚度参数敏感性特征，探索提升作动器效率的有效途径。数值仿真结果表明：弹性铰链的几何参数和位置参数对主动减振系统作动器效率影响均呈现非线性、非单调特征；而采用弹性铰链的拉伸刚度和弯曲刚度作为变量，获得的影响规律在主要设计域中呈现近似线性特征，便于进行弹性铰链改进设计。更多还原

【Abstract】 Improving actuator efficiency is one of the primary objectives of the active damper structural design. Considering the active damper for a typical high-speed wind tunnel model, the characteristics of the dynamic system were analysed, and the deformation pattern of each component during the vibration control process were extracted based on the finite element method and modal experiments. Then, a simplified model was established for the dynamic system using the control voltage of the piezoelectric stacks as the input, and a quantification method for the actuator efficiency was developed for structural design. Finally, considering a baseline active damper with double-hinge structure, the effects of the variations of the flexible hinges parameters on the actuator efficiency were studied, and the strategies for improving it were also explored. The numerical simulation results show that the actuator efficiency is nonlinearly and non-monoticly related to the geometric parameters of the flexible hinges. However, when using the stiffness of the flexible hinges as design variables instead, approximate linear relationships can be achieved in the main design domain, which can provide easier way for the design.更多还原