Unlock instant, AI-driven research and patent intelligence for your innovation.

Composite material star sensor support and preparation method thereof

A composite material and star-sensing technology, applied in the field of composite star-sensing support and its preparation, can solve the problems of failing to meet design requirements, prone to microscopic porosity, long manufacturing cycle, etc., achieving light weight, good thermal stability, The effect of high production efficiency

Active Publication Date: 2013-10-09
BEIJING SATELLITE MFG FACTORY
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Defects such as microporosity, holes, and inclusions are prone to occur, the yield rate is low, and the manufacturing cycle is long (generally 4 to 5 months);
[0005] 2) The thermal stability is poor, and the thermal deformation is 1.86" / ℃, which cannot meet the design requirement of <1" / ℃;
[0006] 3) The first-order fundamental frequency is 122Hz, which cannot meet the requirement of >140Hz

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
  • Composite material star sensor support and preparation method thereof
  • Composite material star sensor support and preparation method thereof
  • Composite material star sensor support and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] A kind of preparation method of composite material star-sensitive stent of the present invention, the specific steps of this method are:

[0052] The first step, fiber preform preparation

[0053] Using high modulus or ultra-high modulus carbon fiber fabric, the fabric structure can be plain weave, twill weave or satin weave. Lay the fabric on the surface of the non-metallic mandrel in a quasi-isotropic manner. The material of the mandrel can be wood, or plastics such as nylon and polyethylene. The mandrel is composed of three cylinders, and the three cylinders are two They are intersecting and connected at the bottom; there are connection and positioning devices between the three parts to ensure the accuracy of the three included angles.

[0054]The laying of the flange is carried out twice, first laying N layers of carbon fiber fabrics, and then laying M layers of carbon fiber fabrics; in order to ensure the continuity of fabric laying, especially the fiber continuit...

Embodiment

[0065] Such as figure 1 , 2 As shown in and 3, a composite material star-sensitive bracket is composed of a flange and three cylinders; three cylinders are distributed on the bottom surface of the flange; the three cylinders intersect each other; The three cylinders are distributed at non-equal angles, and the angles between the projections of the axes of the three cylinders on the flange surface and the datum line are 26.5°, 26.5° and 63° respectively; the axes of the three cylinders and the flange The intersection of the bases forms a triangle with side lengths 60mm x 60mm x 48.3mm;

[0066] The reinforcement material is M55J ultra-high modulus carbon fiber.

[0067] The quasi-isotropic layering method is [0 / +45 / 90 / -45] 2s , 2 is the number of layers, and s stands for symmetrical layering.

[0068] A method for preparing a composite material star-sensitive stent, the steps are:

[0069] The first step, the preparation of carbon fiber prefabricated parts

[0070] 1) Lay...

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

PropertyMeasurementUnit
Tensile modulusaaaaaaaaaa
Thermal expansion coefficientaaaaaaaaaa
Tensile modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a composite material star sensor support and a preparation method of the composite material star sensor support, and belongs to the technical field of composite material structures. Compared with an aluminum casting piece with similar modeling, the carbon fiber composite material star sensor support is characterized in that the structural thermal deformation is reduced from 1.86' per DEG C to 0.6' per DEG C; the first-order fundamental frequency is increased from 122 Hz to 167 Hz; the weight is reduced from 5.68 kg to 3.31 kg, namely by 41.7 %; the dimensional accuracy is high; the quality is stable; as proved by ultrasonic non-destructive testing, the inside of the composite material star sensor support has no defect; the production efficiency is high. Due to the adoption of negative-inflation high / ultrahigh modulus carbon fibers and a quasi-isotropic composite material, the composite material star sensor support has the advantages of being light in weight, high in rigidity, good in thermostability, and high in accuracy and damping vibration attenuation. The composite material star sensor support has been applied to a certain remote sensing satellite successfully and passed space flight testing.

Description

technical field [0001] The invention relates to a composite material star-sensitive bracket and a preparation method thereof, belonging to the technical field of composite material structures. Background technique [0002] The star sensor (hereinafter referred to as the star sensor) is one of the means of attitude control and orbit adjustment on the satellite, and the star sensor bracket is a key part of the satellite assembly parts, which is used for the connection between the star sensor and the satellite camera support structure. Various payloads from production through the life of a space mission. [0003] Xingmin stents should ensure the advantages of light weight, high rigidity, small creep, good thermal stability, simple manufacturing process, and short processing cycle. At present, the material of the star sensitive bracket on the satellite is cast aluminum alloy, and the following problems are found in the production and test: [0004] 1) Defects such as microporo...

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): F16M13/02B29C70/34
Inventor 马立李昊李昞辉杨强罗文波张玉生
Owner BEIJING SATELLITE MFG FACTORY