CAJ | 학술논문

针对弹道导弹、火箭的工作环境存在剧烈振动的情况，研究了激光陀螺捷联惯导系统在线振动环境下的误差传播特性，指出加速度计二次项误差对导航精度有重大影响，建立了包括加速度计二次项误差的31阶误差模型。为了评价该模型的准确性，设计了静态和线振动仿真实验，将其与不考虑二次项误差的28阶误差模型进行了比较。仿真结果表明：静态时，两种模型准确度相当；当系统工作环境存在线振动时，建立的31阶误差模型比28阶误差模型准确度提高约5倍。
침대탄도도탄、화전적공작배경존재극렬진동적정황，연구료격광타라첩련관도계통재선진동배경하적오차전파특성，지출가속도계이차항오차대도항정도유중대영향，건립료포괄가속도계이차항오차적31계오차모형。위료평개해모형적준학성，설계료정태화선진동방진실험，장기여불고필이차항오차적28계오차모형진행료비교。방진결과표명：정태시，량충모형준학도상당；당계통공작배경존재선진동시，건립적31계오차모형비28계오차모형준학도제고약5배。
In view of severe vibration in the operational environment of ballistic missiles and rockets, the error propagation characteristics of the laser gyro strapdown inertial navigation system (SINS) in linear vibration environment were studied and it was noted that the square error of accelerator had a significant impact on the navigation accuracy. Then, a 31-order error model was established including the square error. In order to evaluate the accuracy of the model, the static and linear vibration simulations were designed to compare with the 28-order error model without considering the square error. The simulation results indicate that the two models have equivalent accuracy in the static state but the accuracy of 31-order error model is five times higher than the 28-order model in the vibration state.