小波滤波方法在光纤陀螺惯导系统初始对准中的应用  

The application of the wavelet filter method in the fiber optic gyro initial alignment of inertial navigation system

作　　者：白俊卿[1] 张科[1] 张琪 

机构地区：[1]西北工业大学航天学院,陕西西安710072 [2]西安航天精密机电研究所,陕西西安710100

出　　处：《西北大学学报（自然科学版）》2014年第3期370-372,共3页Journal of Northwest University（Natural Science Edition）

基　　金：航天支撑基金资助项目(NAXW0006)

摘　　要：光纤陀螺捷联惯导系统(FOG SINS)初始对准的精度直接影响到系统的导航精度,而光纤陀螺的随机漂移则是影响系统初始对准精度的重要因素。对小波分析的理论进行深入的研究,将多种小波滤波方法应用于光纤陀螺随机漂移数据的处理中,并对小波滤波结果进行对比,选定出在工程应用中最佳的小波滤波方法,应用Allan方差分析对该方法进行性能评估,并将此小波滤波方法应用于初始对准试验中,对试验结果进行分析,验证了最佳小波滤波方法的先进性。The random drift of fiber optic gyro is an important factor directly affecting the accuracy of the opti- cal for the fiber gyro inertial navigation system and the drift of the fiber optic gyro random is the important fac- tor influencing the system initial alignment precision. In the paper, the theory of wavelet analysis was deeply studied, were compared multiple wavelet filtering methods were used to the inertial navigation system were se- lected. The results of the filter were compared and the best wavelet filter method for the engineering applica- tion were selected. The Allan variance analysis method is used for performance evaluation. The wavelet filter method is applied to initial alignment test, and the results is tested. It verified the best wavelet filter method and has high engineering significance.

关 键 词：光纤陀螺惯导系统 初始对准 小波滤波 Allan方差分析 

分 类 号：V249[航空宇航科学与技术—飞行器设计]