Integration Scheme for SINS/GPS System Based on Vertical Channel Decomposition and In-Motion Alignment

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NOURMOHAMMADI H.; KEIGHOBADI J.

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Journal Paper

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Journal: AUT Journal of Modeling and Simulation Year:2018 | Volume:50 | Issue:1 Page(s): 13-22

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Title

Integration Scheme for SINS/GPS System Based on Vertical Channel Decomposition and In-Motion Alignment

Author(s)

NOURMOHAMMADI H. | KEIGHOBADI J. | Issue Writer Certificate

Keywords

Low-Cost Navigation

SINS/GPS Algorithm

In-Motion Alignment

Vertical Channel

Decomposition

Abstract

Accurate alignment and Vertical Channel instability play an important role in the strap-down inertial navigation system (SINS), especially in the case that precise navigation has to be achieved over long periods of time. Due to poor initialization and the cumulative errors of low-cost inertial measurement units (IMUs), initial alignment is insufficient to achieve required navigation accuracy. To tackle this problem, in this paper, misalignment error is dynamically modeled and In-Motion Alignment is provided based on position and velocity matching. It is revealed that using misalignment error, orientation estimation can be properly corrected. Moreover, to prevent the instability effects of the Vertical Channel, decomposed SINS error model is derived. In the decomposed SINS error model, the navigation states in the Vertical Channel are separated from those in the horizontal plane. Two-step estimation process is developed for integration of the aforementioned SINS error dynamics with the measurements provided by global positioning system (GPS), and fifteen-state SINS/GPS mechanization is presented. Assessment of the proposed approach is conducted in the airborne test

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APA: Copy

NOURMOHAMMADI, H., & KEIGHOBADI, J.. (2018). Integration Scheme for SINS/GPS System Based on Vertical Channel Decomposition and In-Motion Alignment. AUT JOURNAL OF MODELING AND SIMULATION, 50(1), 13-22. SID. https://sid.ir/paper/352255/en

Vancouver: Copy

NOURMOHAMMADI H., KEIGHOBADI J.. Integration Scheme for SINS/GPS System Based on Vertical Channel Decomposition and In-Motion Alignment. AUT JOURNAL OF MODELING AND SIMULATION[Internet]. 2018;50(1):13-22. Available from: https://sid.ir/paper/352255/en

IEEE: Copy

H. NOURMOHAMMADI, and J. KEIGHOBADI, “Integration Scheme for SINS/GPS System Based on Vertical Channel Decomposition and In-Motion Alignment,” AUT JOURNAL OF MODELING AND SIMULATION, vol. 50, no. 1, pp. 13–22, 2018, [Online]. Available: https://sid.ir/paper/352255/en

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