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

Fixed frequency calibration test method of spacecraft vibration

A test method and spacecraft technology, applied in vibration testing, testing of machine/structural components, measuring devices, etc., can solve problems such as no explanation or report found, and data not yet collected, and the method is simple, feasible and adaptable. , the effect of a wide range of applications

Active Publication Date: 2014-05-14
SHANGHAI SATELLITE ENG INST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no description or report of a technology similar to the present invention, and no domestic similar data has been collected 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
  • Fixed frequency calibration test method of spacecraft vibration
  • Fixed frequency calibration test method of spacecraft vibration
  • Fixed frequency calibration test method of spacecraft vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0036] The spacecraft vibration fixed-frequency calibration test method of the invention monitors the supporting reaction force at the root of the spacecraft in the spacecraft vibration test and then monitors the vibration test magnitude.

[0037] Accompanying drawing is the program and step figure of the spacecraft vibration fixed-frequency calibration test of the present invention. As shown in the embodiment of the accompanying drawings, the method includes: determining the corresponding relationship between the support reaction force per unit length and the root strain of the spacecraft produced during the sinusoidal vibration test of the spacecraft, and determining the main force of the spacecraft during the sinusoidal vibration test. The concave condition of the frequency band provides an auxiliary basis. Specifically, in the non-resonance sectio...

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 provides a fixed frequency calibration test method of spacecraft vibration. The method comprises the following steps that: a corresponding relation between a support reaction force per unit length and a strain of a spacecraft root is determined, wherein the support reaction force per unit length is generated by the spacecraft during a sinusoidal vibration test, and an auxiliary basis is provided for determination on a concave downward condition of a main frequency range during the sinusoidal vibration test of the spacecraft; more particularly, at an off-resonance range of the spacecraft, by using a lowest working frequency that is allowed by a vibrating table and is normally from 2 to 5 Hz, sinusoidal excitation with a fixed frequency is carried out on the spacecraft under a certain order. After test evaluation is completed, the test method can be applied to vibrating tests of various spacecrafts, so that rationality and effectiveness of the test can be determined. According to the invention, problems that are common in the vibrating test process of a spacecraft can be solved, wherein the problems include a problem of overloading or underloading; and beneficial effects are as follows: the test is reasonable and reliable; the method can be realized simply; and the adaptability is strong and the like.

Description

technical field [0001] The invention relates to a spacecraft vibration test, in particular to a spacecraft vibration fixed-frequency calibration test method. Background technique [0002] With the development of space technology, the requirements for the lightweight structure of spacecraft are becoming increasingly stringent, and the rationality and safety of experiments are becoming more and more important. At present, the vibration test of spacecraft generally adopts the method of controlling the acceleration input on the docking surface between the bottom of the spacecraft and the test fixture and supplemented by the response limitation of the key points of the spacecraft. However, the above method cannot ensure the rationality of the test. " or "under" test phenomena, such as the FY-2 (02) star initial sample star in Nanjing, due to the "over" test caused the hydrazine pipeline to break and the single machine to fall, causing heavy losses; The occurrence of "owed" tests...

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): G01M7/06
Inventor 姚骏崔伟满孝颖
Owner SHANGHAI SATELLITE ENG INST
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