Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (3): 1067-1074.doi: 10.12305/j.issn.1001-506X.2024.03.33

• Guidance, Navigation and Control • Previous Articles     Next Articles

Deviation of vertical measurement method based on SINS/OD misalignment angle observation

Xinyu LI1,2, Zhaofa ZHOU1,2,*, Zhili ZHANG1,2, Shiwen HAO1,2, Zhe LIANG1,2   

  1. 1. School of Missile Engineering, Rocket Force University of Engineering, Xi'an 710025, China
    2. State Key Discipline Laboratory of Armament Launch Theory and Technology, Rocket Force University of Engineering, Xi'an 710025, China
  • Received:2022-09-07 Online:2024-02-29 Published:2024-03-08
  • Contact: Zhaofa ZHOU

Abstract:

There is a correspondence between attitude misalignment angle of integrated navigation system and deviation of vertical (DOV). It is an effective method to measure DOV by observing attitude misalignment angle. This paper presents a measurement means of DOV based on strapdown inertial navigation system/odometer (SINS/OD) integrated navigation attitude misalignment angle observation and error recursion. Firstly, starting from the velocity error equation of integrated navigation, the complex coupling relationship between the DOV and attitude misalignment angle is deduced. Then, the DOV is directly obtained from the attitude misalignment angle in the navigation process through the step-by-step calculation method of iteration and recursion along the path. Finally, simulation results verify the effectiveness of algorithm and show that the measurement accuracy is related to the length of the driving path. The experimental results show that the average error of DOV is within 0.3″ on the driving path with a driving distance of 35 km, and the single point measurement accuracy at the end point can reach 0.7″.

Key words: deviation of vertical (DOV), attitude misalignment angle, iteration and recursion, strapdown inertial navigation system/odometer (SINS/OD) integrated navigation

CLC Number: 

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