面向翼面展开的压电直线位移累积作动器轻量化设计

Lightweight design of piezoelectric linear displacement accumulation actuator for airfoil deployment

现代小型制导飞行器中常用的电磁式伺服舵机存在寄生磁场影响导航制导精度,同时其减速机构将增加舵机系统体积与质量的问题,而且电磁舵机的工作温度范围较小。近期发展的一种新型压电直线位移累积高功率密度作动器能够有效解决这些问题。建立了该作动器的虚拟样机模型,通过与实验数据进行对比,验证了虚拟样机模型的可靠性。为使作动器在满足翼面展开需求下质量最轻,采用Isight与Adams联合仿真,对压电作动器的压电堆外径、长度、激振频率等参数进行了优化,最终达到了50.8 W/kg输出功率,实现了与现有伺服电机相当的功率密度。

The electromagnetic servo steering gear commonly used in the modern small guided aircraft has parasitic electromagnetic fields that affect the navigation and guidance accuracy,and its deceleration mechanism will increase the volume and mass,and the operating temperature range of the electromagnetic steering gear is small.A recently developed piezoelectric linear displacement accumulating high-power density actuator can solve those problems effectively.A virtual prototype model of piezoelectric linear displacement accumulating high-power density actuator is established,and the reliability of the virtual prototype model is verified by comparing with the experimental data.In order to make the actuator with the lightest weight under the requirements of wing deployment,Isight and Adams co-simulation were used to optimize the parameters of the piezoelectric actuator,such as the outer diameter,length,and excitation frequency.Finally,the output power of 50.8 W/kg is achieved,which is comparable with the power density of the existing servo motor.