舵机结构非线性力学特性研究

摘要

Electric actuator for air-to-air missile is a complex structure with some nonlinear factors, such as clearance and friction.Its precise mechanics modeling technology for electric actuator is the key of missile’ s structural dynamics active design.Based on the electric actuator for a certain air-to-air mis-sile, digital model of the actuator is established using finite element software-ABAQUS.As friction, clear-ance and thread connection changing, the influence law on system static stiffness is studied.Through the-oretical analysis and experimental research on static stiffness, the method of modeling and analyzing for complex structure with strong nonlinear factors is obtained, which provides theoretical basis for active a-nalysis and design of missile structure dynamics.%空空导弹用电动舵机为具有间隙、摩擦等非线性因素的复杂机构，其精确的力学建模技术是空空导弹结构动力学主动设计的关键技术。本文以某型空空导弹电动舵机为实例，采用有限元软件ABAQUS建立舵机系统数字模型，研究了摩擦、间隙及螺纹联接对系统静刚度的影响规律，通过对舵机传动系统静刚度特性的理论分析和试验研究，形成了对具有间隙、摩擦强非线性因素复杂机构的建模和分析方法，为导弹结构动力学的主动分析和设计提供了理论基础。