舵机结构非线性因素建模与影响研究

Nonlinear Factor Modeling and Analysis of Fin Actuator System

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.