PIO Risk Quantitative Assessment of Fly-By-Wire Aircraft

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PIO Risk Quantitative Assessment of Fly-By-Wire Aircraft

Wang, Shihao / Li, Zhe / Xue, Yuan / Li, Youqing / Hu, Wenhui

Flight risk quantification is an effective measure to improve the level of flight safety assurance. Because of the complex control system design of fly-by-wire aircraft, it is difficult to analyze aircraft flying qualities by traditional methods. Pilot Induced Oscillation (PIO) is a key issue in the evaluation of flying qualities. Research on the PIO prediction criteria is relatively complete. However, the prediction results of the criteria are vague, and it is impossible to quantify the tendency and probability of PIO. In order to quantify the PIO risk of fly-by-wire aircraft, the prediction method of the Bandwidth criteria is introduced, and the equivalent system matching is ap-plied to analyze the higher-order system of fly-by-wire aircraft. Based on that, the applicability of the bandwidth criteria was discussed. According to the revised equivalent time delay and system bandwidth, the PIO risk boundary in different state point is defined. And then, the parameters and thresholds are extracted based on the distance between states point and the boundary. The method is applied to software simulation to quantify PIO risks. This paper transparentizes the vague PIO risk. It has theoretical guidance significance and engineering application value for the control law design and flight test of the fly-by-wire aircraft, and it provides the basic theoretical support for preventing and eliminating PIO events from the source.

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Document information

Title :

PIO Risk Quantitative Assessment of Fly-By-Wire Aircraft

Additional title:

Lect. Notes Electrical Eng.

Contributors:

Yan, Liang (editor) / Duan, Haibin (editor) / Yu, Xiang (editor) / Wang, Shihao (author) / Li, Zhe (author) / Xue, Yuan (author) / Li, Youqing (author) / Hu, Wenhui (author)

Published in:

Advances in Guidance, Navigation and Control ; Chapter : 300 ; 3599-3610

Lecture Notes in Electrical Engineering ; 644

Publication date :

2021-10-30

Size :

12 pages

ISBN :

978-981-15-8155-7 , 978-981-15-8154-0

ISSN :

1876-1119 , 1876-1100

DOI :