Hypersonic flight vehicle adaptive fault-tolerant control method of considering attack angle constraint

A hypersonic, fault-tolerant control technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as poor practicability and model uncertainty, achieve good practicability, simplify model analysis, and ensure safety sexual effect

Active Publication Date: 2017-12-08
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor practicability of existing hypersonic vehicle control methods, the present invention provides an adaptive fault-tolerant control method for hypersonic vehicle considering the angle of attack constraint
For model uncertainty

Method used

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  • Hypersonic flight vehicle adaptive fault-tolerant control method of considering attack angle constraint
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  • Hypersonic flight vehicle adaptive fault-tolerant control method of considering attack angle constraint

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Embodiment Construction

[0082] refer to figure 1 . The specific steps of the adaptive fault-tolerant control method of the hypersonic aircraft considering the angle of attack constraint of the present invention are as follows:

[0083] Step 1. Establish the dynamic model of the longitudinal channel of the hypersonic vehicle:

[0084]

[0085]

[0086]

[0087]

[0088]

[0089] Among them, V is the speed, γ is the track inclination, h is the height, α is the angle of attack, q is the pitch angle speed, where u=[u 1 u 2 ] T for each rudder deflection angle, is the unknown fault parameter, δ=diag{δ 1 δ 2}, take δ when the ith actuator fails i =1, otherwise take δ i =0,λ=[λ 1 λ 2 ] T =[0.8 0.8] T . β is the throttle valve opening; T, D, L and M yy Represent thrust, drag, lift and pitching moment, respectively; m, I yy , μ and r represent the mass, the moment of inertia of the pitch axis, the gravitational coefficient, and the distance from the center of the earth. Th...

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Abstract

The present invention discloses a hypersonic flight vehicle adaptive fault-tolerant control method of considering attack angle constraint which is used to solve the technical problem that a conventional hypersonic flight vehicle control method is poor in practicality. The method of the technical scheme is characterized by limiting a flight vehicle attack angle within a given range to guarantee the normal work of a scramjet engine; aiming at the fault case of an actuator, giving out a robust adaptive adjusting and controlling strategy, and utilizing a redundancy control mechanism to effectively compensate the influence brought by the failure to guarantee the safety of a system. Aiming at the model uncertainty, the method of the present invention combines the amplitude limiting design and a Barrier type lyapunov function to give out a controller, thereby being able to guarantee that the attack angle can be restrained within the given range, and guaranteeing the normal work of the scramjet engine. By using a neural network to learn and process the model uncertainty to substitute for the linear parameterization processing, the model analysis is simplified, and the actual application is convenient. Aiming at the fault case of the actuator, the redundancy control mechanism is utilized to compensate the influence brought by the faults effectively and adaptively, thereby being good in practicality.

Description

technical field [0001] The invention relates to a hypersonic aircraft control method, in particular to a hypersonic aircraft self-adaptive fault-tolerant control method considering attack angle constraints. Background technique [0002] Hypersonic vehicle refers to an aircraft that can fly in the atmosphere at a speed of more than five times the speed of sound. Because of its outstanding flight capability, it is possible to strike in real time around the world, so it has received extensive attention at home and abroad. Air-breathing hypersonic vehicles mostly use scramjets as the power source. Since this type of engine cancels the compressor components of traditional jet engines, its air intake efficiency is extremely sensitive to the angle of attack of the aircraft. Only when the angle of attack of the aircraft is limited to Within a certain range, the scramjet engine can work normally. The current research on hypersonic vehicles has less consideration of the angle of atta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 许斌郭雨岩程怡新张睿史忠科凡永华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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