Journal
NONLINEAR DYNAMICS
Volume 99, Issue 4, Pages 2785-2799Publisher
SPRINGER
DOI: 10.1007/s11071-020-05481-1
Keywords
Aircraft nonlinear dynamic model; High angle of attack; Finite-time extended state observer; Super-twisting slide mode control; Thrust vector; Robustness
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Funding
- National Natural Science Foundation of China [61973175, 61573197, 61973172]
- Key Technologies R&D Program of Tianjin [19JCZDJC32800]
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This paper proposes a finite-time decoupling control strategy for aircraft with thrust vector at high angle of attack maneuver. Firstly, the nonlinear mathematical model of the aircraft is presented. Taking into account the insufficiency of the aerodynamic control surface, a thrust vector model with double nozzles is added. Subsequently, a three-channel decoupling control scheme based on finite-time extended state observer is employed to realize the high angle of attack maneuver. Strong coupling among different channels, aerodynamic uncertainties and other unmodeled dynamics are regarded as total disturbance and estimated by a finite-time extended state observer. Super-twisting (SWT) sliding mode control is utilized to obtain expected performance and finite-time stability. The daisy chain method is adopted to realize the control allocation. Finally, the numerical simulations are provided to demonstrate the effectiveness and robustness of the proposed methodology.
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