Application of reverse processing in SINS initial alignment and SINS/GPS integrated navigation
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 5 March 2018
Abstract
Purpose
The study aims to propose reverse processing solution to improve the performance of strapdown inertial navigation system (SINS) initial alignment and SINS-/global positioning system- (GPS) integrated navigation. The proposed scheme can be well applied in the fields of aircraft and aerospace navigation.
Design/methodology/approach
For the SINS alignment phase, a fast initial alignment scheme is proposed: the initial value of reverse filter is determined by the final result of forward filter, and then, the reverse filter is carried out using the stored data. Multiple iterations are performed until the accuracy is satisfied. For the SINS-/GPS-integrated phase, a forward–reverse navigation algorithm is proposed: first, the standard forward filter is used, and then, the reverse filter is carried out using the initial value determined by the forward filter, and the final fusion results are achieved by the weighted smoothing of the forward and reverse filtering results.
Findings
The simulation and the actual test results show that in the initial alignment stage, the proposed reverse processing method can obviously shorten the SINS alignment time and improve the alignment accuracy. In the SINS-/GPS-integrated navigation data fusion stage, the proposed forward–reverse data fusion processing can, obviously, improve the performance of the navigation solution.
Practical implications
The proposed reverse processing technology has an important application in improving the accuracy of navigation and evaluating the performance of real-time navigation. The proposed scheme can be not only used for SINS-/GPS-integrated system but also applied to other integrated systems for general aviation aircraft.
Originality/value
Compared with the common forward filtering algorithm, the proposed reverse scheme can not only shorten alignment time and improve alignment accuracy but also improve the performance of the integrated navigation.
Keywords
Acknowledgements
Research for this paper was supported by the Aviation Science Foundation of China (20150852013) and the Natural Science Foundation of Jiangsu Province (BK2016330). The authors also gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation.
Citation
Liu, H., Jiang, X., Yue, Y. and Gao, G. (2018), "Application of reverse processing in SINS initial alignment and SINS/GPS integrated navigation", Aircraft Engineering and Aerospace Technology, Vol. 90 No. 2, pp. 320-327. https://doi.org/10.1108/AEAT-11-2016-0191
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited