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

Method for lateral prediction correction guidance in stage of entering mars atmosphere

A technology of prediction, correction, guidance and prediction and correction, applied in the field of deep space exploration, can solve problems such as lack of flexibility, and achieve the effect of flexible planning

Inactive Publication Date: 2015-12-02
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these requirements, the traditional method of constraining lateral motion by planning error corridors lacks flexibility in planning lateral motion

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
  • Method for lateral prediction correction guidance in stage of entering mars atmosphere
  • Method for lateral prediction correction guidance in stage of entering mars atmosphere
  • Method for lateral prediction correction guidance in stage of entering mars atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This embodiment discloses a lateral prediction and correction guidance method for the Mars atmosphere entry section, which is used to perform a lateral maneuver in the Mars atmosphere entry section. The lateral maneuver is the roll angle reversal maneuver, so as to save fuel Purpose. Including the following steps:

[0065] Use the dynamic model of the detector to perform numerical integration until the parachute opening condition is met (and the parachute dynamic pressure interval [q min ,q max ] and the parachute Mach number interval [Ma min , Ma max ]), calculate the parachute accuracy deviation s between the parachute opening time and the target position f , the specific implementation method is:

[0066] Step 1. Determine the longitudinal motion guidance instruction |σ|.

[0067] A Probe Considering the Effect of Mars' Rotation on Dimensionless Time The three-degree-of-freedom dimensionless entry dynamics model is

[0068] ...

Embodiment 2

[0108] This embodiment discloses a lateral prediction and correction guidance method for the Mars atmosphere entry section. For the radio navigation scheme of the Mars atmosphere entry section in the future, the aircraft flying over the corresponding considerable area will significantly improve the observability of the navigation system, thereby improving the navigation accuracy. Therefore, it is desirable that the trajectory of the aircraft over a considerable area be as long as possible. For the sake of simplicity, it is assumed here that the aircraft flies over the centroid of the observable area (in this embodiment, the coordinates of the centroid of the observable area are selected as (θ 1 ,φ 1 )=(-45.14°,-43.67°)), the trajectory of its flying over the observable area is the longest.

[0109] This embodiment includes the following steps:

[0110] Use the dynamic model of the detector to perform numerical integration until the parachute opening condition is met (and 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 method for lateral prediction correction guidance in the stage of entering mars atmosphere, relates to a lateral prediction correction guidance method and belongs to the technical field of deep-space exploration. On the basis of a conventional longitudinal prediction correction guidance method, the prediction correction method is introduced into design of a detector lateral motion guidance law. Firstly, lateral motion constraint conditions required by a landing detection task are determined, so as to determine heeling angle inversion frequency required by a detector at the entering stage; then, lateral motion constraint conditions are solved to determine energy of the detector at the heeling angle inversion moment, and when the energy of the detector exceeds energy at the heeling angle inversion moment, heeling angle inversion is carried out. After the constraint conditions are met, next heeling angle inversion energy is determined; finally, a current guidance cycle is determined by combing energy at the heeling angle inversion moment and the longitudinal guidance law and output is guided finally. By adopting the method provided by the invention, while parachute-opening point position accuracy is ensured, lateral motion of the detector entering an orbit can be flexibly planned according to task needs and fuel is saved.

Description

technical field [0001] The invention relates to a lateral prediction and correction guidance method, in particular to a lateral prediction and correction guidance method for the Martian atmosphere entry section, and belongs to the technical field of deep space exploration. Background technique [0002] In the future, Mars landing exploration missions will put forward higher requirements for the landing accuracy on the surface of Mars. The entry into the Martian atmosphere is the longest and harshest stage in the entire Mars entry, descent, and landing process. Ensuring the successful implementation of the entry stage mission plays a vital role in ensuring the accuracy of the final landing. [0003] So far, a total of seven Mars rovers have successfully landed on the surface of Mars. In the latest landing mission "Mars Science Laboratory / Curiosity", the guidance law was adopted for the first time in the entry phase, and the parachute was safely opened in the predetermined pa...

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
IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 崔平远龙嘉腾高艾朱圣英徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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