CAJ | 학술논문

二频机抖激光捷联系统中三个激光陀螺抖动会引起惯性器件的耦合振动,产生系统抖动耦合误差,导致惯导系统导航精度下降.二频机抖激光陀螺捷联惯导系统机械结构较为复杂,很难通过解析法求解其振动特性.作者采用有限元方法对二频机抖激光陀螺进行了正弦信号驱动下的瞬态响应分析,并在正弦信号中加入了抖动随机信号,实现了机抖激光陀螺工作状态的仿真.此外,还对二频机抖激光捷联系统的振动特性进行了瞬态响应分析,掌握了系统的耦合振动情况,并进行了功率谱分析.这为激光捷联系统的频率搭配最优化提供了分析方法,对高精度二频机抖激光捷联系统的设计有重要意义.
이빈궤두격광첩련계통중삼개격광타라두동회인기관성기건적우합진동,산생계통두동우합오차,도치관도계통도항정도하강.이빈궤두격광타라첩련관도계통궤계결구교위복잡,흔난통과해석법구해기진동특성.작자채용유한원방법대이빈궤두격광타라진행료정현신호구동하적순태향응분석,병재정현신호중가입료두동수궤신호,실현료궤두격광타라공작상태적방진.차외,환대이빈궤두격광첩련계통적진동특성진행료순태향응분석,장악료계통적우합진동정황,병진행료공솔보분석.저위격광첩련계통적빈솔탑배최우화제공료분석방법,대고정도이빈궤두격광첩련계통적설계유중요의의.
Three RLGs' dithering in the mechanically dithered RLG strapdown system could lead to coupling vibration of the inertial parts and generate dithered coupling error of the system. The structure of the mechanically dithered RLG strapdown system is quite complicated and it is very difficult to solve the vibration characteristics through the analytical method. By using finite element method, the transient response of the mechanically dithered RLG strapdown system driven by sinusoidal signal is analyzed, in which the sinusoidal signal is added with the random dithered signal, and the simulation of working state of dithered RLG is realized. The transient analysis of vibration characteristics of the system is made which can help to obtain the coupling vibration status of mechanically dithered RLG strapdown system, and the spectrum analysis is implemented. They provide a method to optimize the frequency assortment of the system, and it's very important to the design of the system.