To protect the aircraft flight safety across the envelope of angle of attack, bifurcation analysis and backstepping method are investigated to predict and suppress the unstable nonlinear flight phenomena. By applying bifurcation analysis and continuation method to the flight motion, the onsets of both the chaotic phenomenon called falling leaf motion and the catastrophe phenomenon named coupled jump behavior are derived. To stabilize these unstable motions, a backstepping and disturbance observer based flight controller is designed. According to the main function of the control surface, we divide the flight controller into the airspeed subsystem and the flight path subsystem, where the airspeed subsystem is regulated by an adaptive dynamic inversion controller while the flight path subsystem is stabilized by a third-order compound controller. Considering the parametric uncertainties of aerodynamics, three sliding mode disturbance observers are presented as compensators to approximate the compound uncertainties. Simulations demonstrate that the proposed controller can recover the aircraft from falling leaf motion or coupled jump behavior to straight level flying.
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November 2016
Research-Article
Prediction and Recovery of Aircraft Unstable Nonlinear Phenomena Using Bifurcation Analysis and Backstepping Method
Qi Xin,
Qi Xin
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: jiufengxin@126.com
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: jiufengxin@126.com
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Zhongke Shi
Zhongke Shi
Professor
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: shizknwpu@163.com
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: shizknwpu@163.com
Search for other works by this author on:
Qi Xin
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: jiufengxin@126.com
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: jiufengxin@126.com
Zhongke Shi
Professor
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: shizknwpu@163.com
School of Automation,
Northwestern Polytechnical University,
Xi'an 710072, China
e-mail: shizknwpu@163.com
1Corresponding author.
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received December 6, 2015; final manuscript received June 21, 2016; published online July 22, 2016. Assoc. Editor: Sotirios Natsiavas.
J. Comput. Nonlinear Dynam. Nov 2016, 11(6): 061007 (12 pages)
Published Online: July 22, 2016
Article history
Received:
December 6, 2015
Revised:
June 21, 2016
Citation
Xin, Q., and Shi, Z. (July 22, 2016). "Prediction and Recovery of Aircraft Unstable Nonlinear Phenomena Using Bifurcation Analysis and Backstepping Method." ASME. J. Comput. Nonlinear Dynam. November 2016; 11(6): 061007. https://doi.org/10.1115/1.4034049
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