基于集中参数模型的后缘小翼驱动机构分析

菱形压电驱动器是主动控制襟翼（ACF）系统实现直升机减振、降噪的关键。该文基于菱形放大机构的集中参数模型，发展了可用于负载性能计算的电路等效模型和简化模型。建立了分布式和集中式两种柔性放大机构的参数模型，并通过ABAQUS有限元进行了模型的有效性验证。对比分析了3种典型构型菱形框和压电堆的弹性变形对作动器输出位移和力的影响，揭示了其性能差异的原因。弹簧负载性能分析表明，当负载等效弹簧刚度等于作动器刚度时，作动器输出能量达到最大。

Analysis of Trailing edge Flap Driving Mechanism Based on Lumped Parameter Model

The rhomb piezoelectric actuator is the key to vibration control and noise reduction of helicopter with active control flap (ACF) system. Based on the lumped parameter model of rhomb amplification actuator, the equivalent circuit model and simplified model for loading performance computation are developed. The parameter models of distributed and concentrated compliant amplification mechanism are established, and the effectiveness of model is verified by ABAQUS software. The influences of the elastic deformation of rhombic frame and piezoelectric stack with 3 typical configurations on the output displacement and force are analyzed. The reasons for the difference in performance are revealed. The result of spring loaded performance analysis indicates that the output energy is up to maximum when the stiffness of the load equivalent spring is equal to that of the actuator.