• Title/Summary/Keyword: Precision Navigation

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Alignment error analysis of KAL KE007 inertial navigation system

  • Park, Chan-Ung
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10a
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    • pp.564-566
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    • 1992

  • It is tragic that the Korean Airline Boing 747, KE007, wandered hundreds of miles off course into Soviet airspace and was shot down on September 1, 1983. The exact cuases are not known yet. Thus, speculation centers on human error or faulty procedure of three Litton LTN-72R inertial navigation systems(INS) with which the KAL KE007 was equipped. The inertial platform must be aligned before the INS can be used as a precision inertial navigation system. This analysis checks a possibility that the navigation errors are caused by a wrong INS alignment procedure assuming it is done at Anchorage. Possible causes for the navigational position error, such as alignment errors and gyro drift errors, are analyzed through inertial navigation system error prapagation simulations. A set of misalignment angle is estimated to determine what degree of alignment errors are required to cause the navigation error assuming that the accident is caused by the INS misalignment.

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Gate-to-Gate with Modernized GPS, GALILEO and GBAS

  • Schuster, Wolfgang;Ochieng, Washington
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • v.1
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    • pp.3-8
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    • 2006

  • This paper discusses current challenges, as a result of the rapid increase in air travel, and future navigation needs of Civil Aviation. The objectives pursued by ANASTASIA, a sixth framework European Commission project, are presented. The methods used in the derivation of the navigation performance requirements are introduced and discussed in the context of precision approaches. High-level impacts on the avionics receiver of integrating additional multi-frequency ranging signals from a modernized GPS and Galileo into the current navigation architecture are investigated. Expected performance achievements are presented.

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Compensation of Pseudo Gyro Bias in SDINS (SDINS에서 의사 자이로 바이어스 보상 기법)

  • Jungmin Park
    • Journal of Positioning, Navigation, and Timing
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    • v.13 no.2
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    • pp.179-187
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    • 2024

  • The performance of a Strapdown Inertial Navigation System (SDINS) relies heavily on the accuracy of sensor error calibration. Systematic calibration is usually employed when only a 2-axis turntable is available. For systematic calibration, the body frame is commonly defined with respect to sensor axes for ease of computation. The drawback of this approach is that sensor axes may undergo time-varying deflection under temperature change, causing pseudo gyro bias. The effect of pseudo gyro bias on navigation performance is negligible for low grade navigation systems. However, for higher grade systems undergoing rapid temperature change, the error is no longer negligible. This paper describes in detail conditions leading to the presence of pseudo gyro bias, and proposes two techniques for mitigating the error. Experimental results show that applying these techniques improves navigation performance for precision SDINS, especially under rapid temperature change.

  • https://doi.org/10.11003/JPNT.2024.13.2.179 인용 PDF HTML