Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Disturbance Observer Based Hybrid Sail Period Orbit Keeping Method for Earth-Moon System

A technology that interferes with observers and periodic orbits, applied in the field of aircraft control, can solve problems such as no reliable solutions, and achieve the effects of simple structure, reduced fuel consumption, and improved track maintenance accuracy

Active Publication Date: 2022-02-08
NORTHWESTERN POLYTECHNICAL UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no reliable solution

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
  • A Disturbance Observer Based Hybrid Sail Period Orbit Keeping Method for Earth-Moon System
  • A Disturbance Observer Based Hybrid Sail Period Orbit Keeping Method for Earth-Moon System
  • A Disturbance Observer Based Hybrid Sail Period Orbit Keeping Method for Earth-Moon System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0064] see figure 2 , the present invention is based on the interference observer and the earth-moon system hybrid sail period orbit keeping method comprises the following steps:

[0065] Step 1: Establish the relative orbital motion dynamics equation of the solar sail of the Earth-Moon system.

[0066] in such as figure 1 In the shown Earth-Moon system rendezvous coordinate system, the dynamic equation of the hybrid sail is:

[0067]

[0068] In the formula: a=[a x a y a z ] T , a is the dimensionless acceleration of the mixed sail; U is the equivalent potential function, and

[0069]

[0070] where μ is the mass parameter of the Earth-Moon system.

[0071] Order r ref =[x ref the y ref z ref ] T Indicates the mixed sail reference trajectory, δr=[δx δy δz] T Denotes the controlled trajectory r c with the reference trajectory r ref ...

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

A method for maintaining the periodic orbit of the hybrid sail of the Earth-Moon system based on a disturbance observer, including steps: 1) Establishing the relative motion dynamics equation of the hybrid sail orbit of the Earth-Moon system in the Earth-Moon system's rendezvous coordinate system; 2) In the Earth-Moon system In the CRTBP model, a disturbance force model is established for the eccentricity of the lunar orbit and the gravitational disturbance of the sun; 3) determine the linear period state feedback rate, and design the orbit maintainer with the optimal period; 4) design a nonlinear disturbance observer to make the nonlinear disturbance observation 5) According to the changing law of the mass of the hybrid sail, the particle swarm optimization algorithm is used to optimize the acceleration of the electric propulsion. The orbit keeper with the optimal period of the invention has the advantages of simple structure and strong robustness, and the nonlinear disturbance observer can improve the orbit keeping accuracy. The invention reduces fuel consumption of the electric propulsion system and prolongs the working life of the system.

Description

technical field [0001] The invention belongs to the field of aircraft control, and in particular relates to a periodic orbit keeping method for a hybrid sail of an earth-moon system based on a disturbance observer, aiming to make full use of the orbit keeping ability of a solar sail, optimize the thrust of an electric propulsion system, and save fuel. Background technique [0002] Compared with traditional spacecraft, solar sails use solar light pressure to obtain continuous small thrust without fuel and have the advantages of high load ratio, so their application potential in Earth-Moon space missions is huge. However, due to the perturbation of the earth-moon space environment and the instability of the orbit of the pivot point, the solar sail needs to actively control the orbit to achieve high-precision maintenance of the mission orbit. [0003] The previous theoretical research on solar sails in the Earth-Moon system mainly focused on the design and control of the suspen...

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): G05B13/04
CPCG05B13/042
Inventor 袁建平高琛袁静张军华李琪王伟
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com