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Reentry attitude fault-tolerant control method for hypersonic aircraft

A hypersonic, fault-tolerant control technology, applied in attitude control and other directions, can solve problems such as economic losses and catastrophes

Active Publication Date: 2015-09-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once a failure occurs, it will often cause economic losses or even catastrophic consequences

Method used

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  • Reentry attitude fault-tolerant control method for hypersonic aircraft
  • Reentry attitude fault-tolerant control method for hypersonic aircraft
  • Reentry attitude fault-tolerant control method for hypersonic aircraft

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Embodiment Construction

[0058] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0059] refer to Figures 1 to 4D As shown, a hypersonic vehicle re-entry attitude fault-tolerant control method of the present invention, firstly, the controller designed by Backstepping is used to obtain the desired control torque:

[0060] Define the state variable x 1 =Ω,x 2 = ω, select the reentry attitude model

[0061] x · 1 = h 1 ( x 1 ) x 2

[0062] x · 2 = h ...

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Abstract

The invention discloses a reentry attitude fault-tolerant control method for a hypersonic aircraft. The method comprises: firstly, designing a controller by adopting a Backstepping method to obtain a desired control torque; then, allocating the desired control torque to an execution mechanism in view of a partial failure fault and a clamping fault on a control surface, wherein the pneumatic control surface is used as a first execution mechanism, and an RCS (Radar Cross Section) is used as a second execution mechanism; and when the control torque provided by the pneumatic control surface is insufficient, starting the RCS. By designing the fault-tolerant control strategy, a closed-loop system is stable, and is verified in simulation.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a hypersonic vehicle reentry attitude fault-tolerant control method which integrates an aerodynamic rudder surface and an RCS. Background technique [0002] Compared with ordinary aircraft, the unique characteristics of hypersonic aircraft such as high-order nonlinearity, strong coupling, and uncertainty, as well as the complex and changeable external flight environment have brought challenges to the design of the controller. The purpose of re-entry control is to design an attitude control strategy so that the attitude angle can track the reference command and ensure the stability of the entire aircraft control system. [0003] In the initial stage of reentry of a hypersonic vehicle, due to the thin air, low dynamic pressure and low efficiency of aerodynamic control surfaces, it is necessary to use a reaction control system (RCS) to control the attitude. Th...

Claims

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Application Information

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IPC IPC(8): G05D1/08
Inventor 齐瑞云钱佳淞姜斌何晶晶
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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