电动舵系统颤振影响因素分析

Study on Impact Factors of Chattering in Electromechanical Actuator

关键词:  电动舵系统  颤振  刚度  负载惯量  间隙

Key words:  Electromechanical actuator  Chattering  Stiffness  Load inertia  Backlash

摘要:

针对电动舵系统颤振问题，将舵系统简化为双惯量模型，并在该模型的基础上分析了舵系统颤振的原因。通过对舵系统传递函数以及单自由度碰撞振动系统力学模型的分析，得出传动机构刚度、间隙等非线性因素以及负载惯量对舵系统稳定性的影响，并分析了各因素造成舵系统颤振的原因。通过数学仿真，验证了所得结论的正确性，并针对颤振抑制提出了相应的改进措施。

Abstract:

To avoid chattering in electromechanical actuation system, the system model is simplified as a two-mass transmission one, and the causes for chattering are analyzed on the basis of the model. By analyzing the transfer function of the actuator system and the model of a one-degree-of-freedom vibroimpact system, the way the load inertia and the nonlinear factors like servo drive stiffness and backlash impact on the performance of the system is discussed. The results of simulation show that the theory could explain the causes of the chattering in electromechanical actuator. Measures are put forward for the suppression of the chattering