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http://dx.doi.org/10.5139/JKSAS.2008.36.11.1104

A Study on the Improvement of Pitch Autopilot Flight Control Law  

Kim, Chong-Sup (한국항공우주산업(주))
Hwang, Byung-Moon (한국항공우주산업(주))
Lee, Chul (한국항공우주산업(주))
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.11, 2008 , pp. 1104-1111 More about this Journal
Abstract
The supersonic advanced trainer based on digital flight-by-wire flight control system uses aircraft flight information such as altitude, calibrated airspeed and angle of attack to calculate flight control law, and this information is measured by IMFP(Integrated Multi-Function Probe) equipment. The information has triplex structure using three IMFP sensors. Final value of informations is selected by mid-value selection logic to have more flight data reliability. As the result of supersonic flight test, pitch oscillation is occurred due to IMFP noise when altitude hold autopilot mode is engaged. This tendency may affect stability and handling quality of an aircraft during autopilot mode. This paper addresses autopilot control law design to remove pitch oscillation and these control laws are verified by non-real time simulation and flight test. Also, pitch response characteristics of pitch attitude hold autopilot mode is improved by upgrading the control law structure and feedback gain tuning during bank turn.
Keywords
Autopilot; IMFP; FLCS;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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