导弹电动伺服系统非线性特性建模与仿真研究

摘要

Missile electro-mechanical servo system is a complex nonlinear system. Before successfully applied in the missile control system, the electro-mechanical servo system must overcome the problems that its performance is vulnerable by gap and friction, as well as its low stiffness caused by the control system dynamics. As a critical part of missile control system, the dynamic and static characteristics of the servo system directly affect the performance of the missile' s control, which decides whether the missile can flight stably. In this paper, based on the analysis of the causes of nonlinearity in the servo system, we used the theory of nonlinear characteristics for modeling, introduced the control method to restrain the effects of nonlinearity and improve the positioning accuracy. Simulation verified the correctness of the model and the control compensated algorithm.%研究导弹电动伺服系统优化问题,由于导弹电动伺服系统是复杂的非线性系统,导弹上成功应用必须克服控制系统中的间隙、摩擦等扰动因素的不利影响,以及自身刚度低所带来的控制系统动态特性很难提升等缺陷.伺服系统作为导弹控制系统的执行机构,对动、静态特性将直接影响导弹的操控稳定性能,并决定导弹能否稳定飞行.为提高伺服系统性能,在分析电动伺服系统非线性特性影响因素的基础上,对非线性特性进行机理建模,同时采用控制补偿方法抑制非线性影响,提高电动伺服系统的位置控制精度,仿真验证了模型控制补偿的正确性,为优化伺服系统的设计提供了依据.