基于Simulink的平台式惯性导航系统误差仿真

Simulation of Error of Simulink-Based Platform Inertial Navigation System

给出平台式无阻尼惯性导航系统误差的数学模型，然后介绍了Simulink的误差建模方法，并建立了系统的Simulink仿真图形模型，对系统误差进行了仿真，并对仿真结果进行了分析。该方法避免了大量的复杂运算，通过Simulink仿真图形模型，可以直观地看出产生三种周期性振荡误差的原因，仿真输出的图形能够清楚地显示系统误差的大小及变化趋势，达到分析惯导各种误差变化的目的。通过对误差进行补偿和修正从而可提高惯性导航系统的使用精度。

The mathematic model of the error of the platform inertial navigation system（INS） in free damp state was described. The design of the simulation model with Simulink, and the Simulink graphic model for the error of platform INS were created. The simulation result was given and analyzed. This method can avoid the vast complexity of transform. By the Simulink graphic model ,we can see reasons of the three kinds of periodicity vibration errors. The purpose of the analysis on the INS＇s errors could be reached by the change trends ,which could be clearly displayed by the simulation graphic exported. The accuracy of using the INS would be improved via compensating and amending the errors.