空气舵执行机构非线性动力学特性表征方法研究  

Research on Characterization Method of Nonlinear Dynamic Characteristics of Air Rudder Effector System

作　　者：李雨青 南宫自军[1] 刘博[1] 张磊[1] LI Yu-qing;NANGONG Zi-jun;LIU Bo;ZHANG Lei(China Academy of Launch Vehicle Technology,Beijing,100076)

机构地区：[1]中国运载火箭技术研究院,北京100076

出　　处：《强度与环境》2020年第4期1-6,共6页Structure & Environment Engineering

基　　金：国家自然科学基金面上项目(11972377);爆炸科学与技术国家重点实验室开放基金资助项目(KFJJ19-04M)。

摘　　要：空气舵作为常用的航天飞行器执行机构,具有饱和、间隙与摩擦等非线性因素,如不能准确表征其非线性动力学特性将会影响飞行控制系统的稳定性,甚至造成飞行失利。针对上述问题,开展了空气舵执行机构非线性动力学特性表征方法研究,旨在为非线性动力学特性分析提供工程方法,为控制系统设计提供重要依据。通过研究,提出了试验测试方法、多维空间重构表征方法和传递函数表征方法,三种方法依次递进,可用于控制系统工程设计的各个阶段,对于提高飞行器稳定裕度和飞行可靠性奠定了重要方法基础。As a kind of commonly used aerospace vehicle effectors,air rudder has nonlinear characteristics such as saturation,clearance and friction,etc.If these nonlinear dynamic characteristics cannot be accurately characterized,the stability of the flight control system will be affected and even cause flight failure.In order to solve the above problems,the research on the characterization method of nonlinear dynamic characteristics of air rudder effectors system was carried out.This study is aiming to provide engineering methods for characterizing the nonlinear dynamics characteristics of air rudder effectors systems,and provide an important basis for the design of control system.Three methods are proposed,namely experimental characterization method,multidimensional space reconstruction characterization method and transfer function characterization method.The three methods can be used in different phases of the engineering design of control system,and lay important foundation for improving the stability margin and reliability of the space vehicles.

关 键 词：空气舵执行机构 非线性动力学 传递函数 表征方法 

分 类 号：V421.6[航空宇航科学与技术—飞行器设计]