CAJ | 학술논문

二频机抖激光陀螺由于静态锁区和动态锁区的客观存在,要求光学谐振腔体不仅要绕敏感轴作正弦抖动,还要按一定的随机规律改变抖动幅度.二频机抖激光陀螺捷联惯导系统机械结构较复杂,很难通过解析法求解其振动特性,采用有限元法对二频机抖激光陀螺抖动特性的仿真方法进行研究.对激光陀螺的关键点进行激光测振实验,对激光陀螺的输出信号进行了高频采样;并对所得采样数据进行功率谱分析,证明了仿真方法的正确性.采用该方法对激光陀螺工作状态进行动力学仿真,可获得工作状态下任意位置的动力学参数,对分析激光陀螺及捷联系统因抖动而产生的误差有重要意义.
이빈궤두격광타라유우정태쇄구화동태쇄구적객관존재,요구광학해진강체불부요요민감축작정현두동,환요안일정적수궤규률개변두동폭도.이빈궤두격광타라첩련관도계통궤계결구교복잡,흔난통과해석법구해기진동특성,채용유한원법대이빈궤두격광타라두동특성적방진방법진행연구.대격광타라적관건점진행격광측진실험,대격광타라적수출신호진행료고빈채양;병대소득채양수거진행공솔보분석,증명료방진방법적정학성.채용해방법대격광타라공작상태진행동역학방진,가획득공작상태하임의위치적동역학삼수,대분석격광타라급첩련계통인두동이산생적오차유중요의의.
As the objective existence of static and dynamic lock area,it is required that the optical resonant cavity of the Mechanically Dithered RLG shall not only make sinusoidal jitter around the sensitive axis but also change its jitter range according to a stochastic metrics.The mechanical structure of mechanically dithered RLG strapdown system is very complicated and it is difficult to solve its dithering characteristics through analytic method.Finite element method is adopted to research the simulation means of dithering characteristic of mechanically dithered RLG.To prove the correctness of the simulation method,laser vibrometer experiments on key points of laser gyro and its output signal high-frequency sampling is made and the power spectrum of the sampling data is also analyzed.Dynamic parameters at random position under working can be obtained by using this method to carry out dynamic simulation to the working laser gyro and this method also means a lot to analyze the error caused by the dithering of laser gyro and its strapdown system.