舵机结构非线性因素建模与影响研究

摘要

结构非线性因素不可避免存在于舵机系统中，影响实验室内对系统的准确测试。本文就舵机系统中常见的传动间隙、摩擦、齿轮啮合刚度等结构非线性因素建立数学模型，以所得模型为基础进行建模与仿真，根据仿真结果对系统时域响应和振动分析，得到了摩擦和间隙对舵机运动及系统基频的影响。这对提高舵翼系统飞行控制面的有效性和安全性，有一定的工程分析和理论研究意义。%The nonlinear factors in fin actuator system (FAS)are inevitable, and often sway the pre-cision of lab test result .Mathematical models of FAS nonlinear factors like back lash , friction and mesh rigidity are established firstly .Based on these models , FAS modeling and simulation are conducted .The effects of friction and back lash on fin actuator motion and system basic frequency are gotten from simula -tion analysis for system time-domain response and vibration .These effort provide ground for further study on the performance and safety of pneumatic fin .