Uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method of aircraft

A sliding mode adaptive, uncertain technology, applied in the field of aircraft control, can solve problems such as poor practicability

Active Publication Date: 2019-11-15
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of poor practicability of existing discrete control methods for aircraft, the present invention provides a discrete sliding mode adaptive control method for aircraft based on uncertainty upper bound estimation

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
  • Uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method of aircraft
  • Uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method of aircraft
  • Uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method of aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0119] The present invention will now be further described in conjunction with the embodiments and drawings:

[0120] Reference figure 1 The specific steps of the discrete sliding mode adaptive control method for an aircraft based on the uncertainty upper bound estimation of the present invention are as follows:

[0121] Step 1: Consider the aircraft longitudinal channel dynamics model

[0122]

[0123]

[0124]

[0125]

[0126]

[0127] Where X s =[V,h,α,γ,q] T Is the state variable, U c =[δ e ,β] T Is the control input; V means speed, γ means track inclination, h means altitude, α means angle of attack, q means pitch speed, δ e Indicates rudder deflection angle, β represents throttle opening; T, D, L and M yy Respectively represent thrust, drag, lift and pitch rotation moment; m, I yy , Μ and r respectively represent the mass, the moment of inertia of the pitch axis, the gravitational coefficient and the distance from the center of the earth;

[0128] The torque and parameters of ...

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 relates to an uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method of an aircraft, thereby solving a technical problem of poor practicability of the existing discrete control method of the existing aircraft. Euler discretization is carried out on a longitudinal channel dynamic model of an aircraft to obtain a discrete form of an original system; withconsideration of the system causality, an equivalent prediction model of a discrete strict feedback system is established; uncertainty of the system is defined and an adaptation law with a dead zoneis designed to carry out online estimation on an unknown uncertainty upper bound; an upper bound estimation error is introduced into an uncertainty upper bound update law to improve the estimation precision; a sliding mode surface is defined, a current control input is designed by using a future expected output, and a discrete sliding-mode adaptive controller based on a backstepping method is designed. According to the invention, on the basis of characteristics of computer control, a non-causal problem is solved effectively by using a discrete sliding-mode controller based on model conversiondesign; the robustness and adaptability of the flight control system are improved; and the uncertainty-upper-bound-estimation-based discrete sliding-mode adaptive control method is suitable for the engineering application.

Description

Technical field [0001] The invention belongs to the field of aircraft control, and in particular relates to an aircraft discrete sliding mode adaptive control method based on uncertainty upper bound estimation. Background technique [0002] In actual engineering, with the development of computer technology, many high-performance aircraft are equipped with computer systems, and most of their control tasks need to be realized by airborne computers. Therefore, the study of advanced control methods in discrete situations is of great significance to the research of aircraft control And there is an urgent need. [0003] The design of discrete controller usually adopts two methods: 1) First design the controller according to the continuous control object, and then discretize the continuous controller; 2) Design the discrete controller directly according to the discrete control object. The first method requires a faster sampling rate and requires higher system hardware. In actual enginee...

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 Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 许斌程怡新杨舒曲浩然梁捷
Owner NORTHWESTERN POLYTECHNICAL UNIV
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