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

Jumping start point energy management method for salutatory reentry of lunar spacecraft

A technology of starting point energy and management method, which is applied to the system of the spacecraft returning to the earth's atmosphere, the guidance device of the spacecraft, the landing device of the spacecraft, etc. It can solve the problems of high performance requirements of the onboard computer and so on.

Active Publication Date: 2014-07-16
NAT UNIV OF DEFENSE TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, numerical prediction has high requirements on the performance of the shipboard computer, and it has not been applied in engineering practice yet.

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
  • Jumping start point energy management method for salutatory reentry of lunar spacecraft
  • Jumping start point energy management method for salutatory reentry of lunar spacecraft
  • Jumping start point energy management method for salutatory reentry of lunar spacecraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The basic idea of ​​the present invention is: firstly adopt the maximum roll angle to re-entry, so as to facilitate the capture of the lunar exploration spacecraft; then control the energy dissipation rate and energy dissipation amount of the lunar exploration spacecraft, and estimate the starting point of the jump in real time according to the online parameter identification results The energy value determines the exit timing of the energy management section; finally, it flies according to the preset constant roll angle, so that the spacecraft jumps at the predetermined energy value.

[0031] Assume that a lunar exploration spacecraft obtains lift during reentry through the center of mass offset configuration, the lift-to-drag ratio is 0.3-0.4, and the control amount of the guidance system is the roll angle ν. The re-entry process starts at an altitude of 120km, at this time the speed of the spacecraft is 11km / s, and the local velocity inclination is -5.8. The motion e...

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 jumping start point energy management method for salutatory reentry of a lunar spacecraft. The method includes firstly, reentering by a maximum heeling angle to facilitate capture of the lunar spacecraft; secondly, controlling energy dissipation ratio and energy dissipation quantity of the lunar spacecraft, estimating an energy value at a jumping start point in real time according to an online parameter identification result, and determining a quit opportunity of an energy management section; finally, flying according to a preset literal heeling angle to enable the spacecraft to jump at a preset energy valve. By the method, precision management on energy at the jumping start point can be realized, so that the probability atmosphere capture of the lunar spacecraft is improved, and proper energy is reserved for follow-up voyages.

Description

technical field [0001] The invention relates to the technical field of guidance and control, in particular to a jump point energy management method for a lunar exploration spacecraft jumping reentry. Background technique [0002] When the lunar exploration spacecraft returns and re-enters the earth, the initial state of reaching the boundary of the atmosphere is very different from that of the near-Earth spacecraft. The most obvious feature is that the re-entry speed of the lunar exploration spacecraft is higher, reaching 11km / s, while the near-Earth spaceflight The reentry speed of the vehicle is generally about 7.8km / s. In order to satisfy constraints such as heat flux density and overload during the reentry process, increase the reentry voyage, and improve the safety and flexibility of reentry, most lunar exploration spacecraft adopt jumping reentry methods, such as the American "Apollo" Spaceships, Crew Exploration Vehicles (CEVs), etc. [0003] Compared with the direc...

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): B64G1/62B64G1/24
Inventor 张洪波罗宗富曾亮汤国建
Owner NAT UNIV OF DEFENSE TECH
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