Mechanical environment prediction method of lunar probe soft landing impact

An impact mechanics and detector technology, applied in the field of deep space exploration, can solve problems such as the inability to truly reflect the impact response of the detector payload, and achieve the effects of shortening the product design cycle, improving the solution efficiency, and saving design costs.

Inactive Publication Date: 2014-03-26
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the impact response of the payload of the probe cannot be truly reflected, and propose a method for predic

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
  • Mechanical environment prediction method of lunar probe soft landing impact
  • Mechanical environment prediction method of lunar probe soft landing impact
  • Mechanical environment prediction method of lunar probe soft landing impact

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Take the central body top plate (the finite element model of the detector structure see figure 2 ) as an example, formulate its impact mechanics environment design and test conditions.

[0032] Step 1: Excitation prediction, select an appropriate method to predict the dynamic response of the structure according to the characteristics of the excitation.

[0033] For the lunar soft landing probe, due to the limiting effect of the landing buffer, the excitation energy acting on the main structure of the probe base is mainly concentrated in the low frequency band, so the dynamic response of the main structure of the probe is also concentrated in the low frequency band. According to NASA In the manual "NASA-HDBK-7005", the finite element method can be used to predict the response, that is, the soft landing dynamic response of the probe is a low-frequency transient dynamic problem.

[0034] Step 1.1: Establish a rigid body dynamics model for the soft landing of the lunar pr...

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 a mechanical environment prediction method of lunar probe soft landing impact, and belongs to the technical field of deep space exploration. According to the method, a non-linear finite element model of probe lunar surface soft landing is established, model reduction is conducted on a probe according to the generalized dynamic condensation method, and therefore the purpose of improving the solving efficiency is achieved; then, non-linear finite element solving is conducted on the reduced model to obtain a dynamic response of the structure of the probe; after an acceleration speed response at a concerted position is obtained, the shock spectrum of the acceleration speed response of the structure is calculated according to a recursion digital filtering method, wherein the shock spectrum is used for describing the dynamic environment of probe landing impact; at last, a maximum expected environment is obtained by the adoption of a spectrum enveloping method, wherein the maximum expected environment is used for setting the designing and testing conditions of equipment. By means of the mechanical environment prediction method, the solving efficiency is improved and the product designing period is shortened.

Description

technical field [0001] The invention relates to a method for predicting the impact mechanical environment of a lunar probe soft landing, and belongs to the technical field of deep space exploration. Background technique [0002] In order to realize the mission of soft landing on the lunar surface, the lunar probe system will go through two major processes: the flight and landing process and the working process on the lunar surface. According to the current research results, there is basically no geological activity on the moon, so after a safe landing, there is no typical mechanical environment except for a small amount of disturbance caused by the movement of various mechanisms of the probe system. Therefore, the main mechanical environment of the detector system is reflected in the flight and landing process. The flight and landing process can be divided into four parts: the launch stage of the carrier rocket, the transfer stage of the earth to the moon, the circle of the...

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): G06F17/50
Inventor 刘莉周思达董威利杨武陈树霖张南富
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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