Fault-tolerant control method for hypersonic vehicle elevator fault with state constraints

A hypersonic, fault-tolerant control technology, applied in general control systems, control/regulation systems, testing/monitoring control systems, etc., can solve the problems of reducing system accuracy, ignoring speed subsystem and high degree of subsystem coupling, etc. Accuracy and the effect of ensuring safe flight
CN110262448BActive Publication Date: 2021-08-10NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2021-08-10

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Abstract

The invention discloses a state-limited hypersonic vehicle elevator fault-tolerant control method. Aiming at the longitudinal model of the hypersonic vehicle, an adaptive fault-tolerant controller is proposed under the premise of considering the internal coupling of the system to realize the state constraints. The complexity brought about by aerodynamic uncertainties, external disturbances and elastic modes is considered throughout the controller design process. First, a sliding mode control method is introduced to deal with the coupling of the system in the first step of the backstepping process. Next, barrier Lyapunov functions are applied in the subsequent backstepping process to ensure that the angle of attack and pitch rate are limited. Moreover, due to the introduction of the dynamic surface method, the problem of differential explosion is avoided. Finally, a fault-tolerant controller structure is designed for unknown faults of the elevator. The invention can simultaneously deal with the coupling problem and the state limit problem of the system, thereby improving the accuracy of the control system.
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Description

technical field

[0001] The invention relates to a hypersonic vehicle elevator fault-tolerant control method with state limitation, and belongs to the technical field of automatic control. Background technique

[0002] Hypersonic vehicles are by far the most complex flight process, and have many different flight characteristics compared with subsonic / supersonic vehicles. Due to the large-scale changes in working conditions, the huge difference in the aerodynamic characteristics of hypersonic vehicles at high and low altitudes, and the rapid changes in mass distribution, the dynamic characteristics and model parameters of hypersonic vehicles change significantly during flight. The integrated configuration of the engine and the fuselage results in a strong coupling between the elastic fuselage, propulsion system, and structural dynamics, resulting in very complex flight dynamics characteristics of hypersonic vehicles and great uncertainty. At the same time, the state of hypers...

Claims

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