Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (9): 2612-2619.doi: 10.12305/j.issn.1001-506X.2021.09.30

• Guidance, Navigation and Control • Previous Articles     Next Articles

Aircraft height optimization algorithm of integrated navigation in terminal area based on height anomaly compensation

Shuguang SUN, Qixin WEN*   

  1. College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China
  • Received:2020-11-04 Online:2021-08-20 Published:2021-08-26
  • Contact: Qixin WEN

Abstract:

The instrument landing system (ILS) is used for aircraft approaching and landing in the terminal area of most large airports. However, due to price and usage environment, some airports are not equipped with ILS. Aiming at the airport terminal area not equipped with ILS, a method of using the error judgment factor is proposed. Combined with the height anomaly compensation algorithm, the combination of the air data system (ADS), strapdown inertial navigation system (SINS) and Beidou navigation system (BDS) are used to optimize the altitude calculation algorithm for improving the height accuracy during aircraft approaching. A new Kalman filter altitude measurement equation is established by combining the elevation anomalies in the airport terminal area to optimize and simulate the altitude positioning algorithm of the integrated navigation system. The simulation results show that the algorithm not only reduces the BDS height error significantly through the height anomaly compensation in the terminal area, but also suppresses the divergence of the SINS error. The error of height positioning after combination affected by the static pressure source error can reduce 41.52% compared with the single system. The algorithm improves the high positioning accuracy.

Key words: height anomaly, integrated navigation, Kalman filter, approaching and landing, static pressure source error

CLC Number: 

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