一种用于鸭翼控制的摇头型双圆环压电马达研究

Research on Rocking Head Type Piezoelectric Motor with Double AnnualPlate for Canard Control

针对制导弹药平台对舵机的紧凑、直驱等要求,提出了一种采用夹心式换能器诱发双圆环弯曲振动的复合型压电定子结构,由此可构成结构精巧的摇头型双圆环旋转压电马达,用以驱动鸭式舵翼产生特定的偏转运动。该马达中的复合定子主体为一个具有四片压电陶瓷片的夹心式换能器,分别在换能器两输出端设计了利于放大振幅的环形圆盘;夹心式换能器的摇头运动激励出两端环形圆盘的五阶弯曲模态,通过圆环将输出振幅进一步放大;两个圆盘形转子在一定的预压力作用下与复合型压电定子两端的圆环表面保持紧密接触,通过摩擦将圆环表面的椭圆轨迹转换为转子的旋转运动。设计了可用于某制导系统鸭舵偏转操纵的直驱马达结构,建立了基于夹心式换能器的双圆环形定子结构动力学模型,通过有限元软件对定子的模态进行了仿真分析,设计并加工出了样机。搭建了测试平台对样机的输出特性进行了实验,测试结果表明:该双圆环(双)输出轴马达可实现双输出轴同时旋转,在300 V峰峰值的驱动电压下,最大转速可达190 r/min,最大输出扭矩可达0.07 N·m。

Aiming at the compact and direct drive requirements of rudder actuator for guided ammunitions,a hybrid piezoelectric stator with sandwich transducer inducing bending vibration of double annual plate was proposed.A novel rotary piezoelectric motor might be configured by the proposed stator to actuate the canard wings.Four pieces of piezoelectric ceramics were installed in the middle of the sandwich transducer to excite the bending mode of the stator and the output amplitudes were amplified by two annual plates.The rocking head type vibrations of sandwich transducer excited the fifth-order bending mode of the annual plates at both ends and the output amplitudes might be amplified.Two disk rotors were pressed on the driving surface of the hybrid stator and driven to rotate by the friction interface between the stator and rotors.The rocking head type motor with double annual plates was designed for the actuation of canard wings of a guidance system.The structural dynamics model of the hybrid stator was built,and the vibration mode of the stator was calculated by using the finite element method.Then a prototype of the rocking head type piezoelectric motor with double annual plate was produced.Finally,a test platform was built to study the output characteristics of the motor.Under the driving voltage of 300 V,the maximum speed may reach 190 r/min and the maximum output torque may reach 0.07 N·m.