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

Active Publication Date: 2021-08-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both of the aforementioned papers ignore the coupling of velocity and altitude subsystems
the dynamics of hypersonic vehicles are characterized by strong coupling, therefore, ignoring the coupling between height dynamics and velocity dynamics may reduce the accuracy of the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fault-tolerant control method for hypersonic vehicle elevator fault with state constraints
  • Fault-tolerant control method for hypersonic vehicle elevator fault with state constraints
  • Fault-tolerant control method for hypersonic vehicle elevator fault with state constraints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0062] Such as figure 1 As shown, the present invention provides a method for controlling elevator failure of hypersonic aircraft, comprising the following steps:

[0063] Step 1, establish the longitudinal kinematics and dynamics model of the cruise segment of the hypersonic vehicle, the model is expressed as:

[0064]

[0065]

[0066]

[0067]

[0068]

[0069]

[0070] where V, γ, h, α, q, ζ i Respectively represent the velocity, track angle, height, attack angle, pitch rate and elastic variable of the hypersonic vehicle; L, D, T are the lift, drag and thrust respectively; m, μ, r represent the mass and gravitational constant of the vehicle , the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0286
Inventor 齐瑞云彭志宇姜斌孟亦真董旺唐建
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap