SINS制导工具误差补偿研究

 针对现有SINS制导工具误差模型不能满足“天地一致性”的问题，提出了基于实际弹道数据的SINS制导工具误差补偿方法，即首先建立SINS制导工具误差模型，然后采用改进的特征值有偏估计方法(LRE)估计具有复共线性特性的误差模型，最后利用该误差模型对捷联惯性仪表进行误差补偿。半物理仿真试验的结果表明，高度通道的最大测量误差由补偿前的52米降低到补偿后的8米，其余通道的补偿效果类似。这证明了该误差模型的正确性和估计方法的有效性，为将来SINS制导工具误差补偿和提高SINS制导精度提供了充分的依据。

Study on SINS Guidance Instrument Error Compensation

In view of the difference between the strapdown iner ti al navigation system(SINS) guidance instrument error parameters in the ground ex periment environment and those in the flight environment, the approach to compen sate SINS guidance instrument errors based on tracking data and telemetry data i s developed. Firstly the error models are established. Secondly the improved lat ent root estimation(LRE) is applied in order to overcome the multicolinearities of the error models and estimate the error parameters. Thus the error models are determined based on the estimated error parameters. Finally the strapdown inert ial instrument errors are compensated based on the identified error models. Semi -physical simulation results show that the maximum height error decreases from 52 m to 8 m after error compensation. It demonstrates the accuracies of the erro r models and the effectiveness of LRE. It provides a foundation for the error co mpensation of SINS guidance instruments and improvement on SINS guidance precisi on.