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Grounding requirements of spacecraft
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GB/T 29084-2012
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Basic data | Standard ID | GB/T 29084-2012 (GB/T29084-2012) | | Description (Translated English) | Grounding requirements of spacecraft | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | V71 | | Classification of International Standard | 49.020 | | Word Count Estimation | 8,870 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the spacecraft, equipment, as well as its ground test system grounding requirements. This standard applies to the grounding design spacecraft and spacecraft testing, assembly, transportation and other ground implementation. | GB/T 29084-2012: Grounding requirements of spacecraft---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Grounding requirements of spacecraft
ICS 49.020
V71
National Standards of People's Republic of China
Spacecraft grounding requirements
Issued on. 2012-12-31
2013-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Aerospace Science and Technology Corporation.
This standard by the National Aerospace Technology and Application of Standardization Technical Committee (SAC/TC425) centralized.
This standard drafting unit. China Academy of Space Technology Master unit.
The main drafters of this standard. Xu Hancheng, Wu Yuequn, Jiang Dongsheng.
Introduction
This standard belongs to China Aerospace national standards. China Aerospace national standards applicable to national standards in the field of aerospace and revision
Management, covering the management of space, space technology, space applications and services of the three fields, is to guide spacecraft and launch vehicle project management, engineering research
System, space launch services, in-orbit satellite applications based activities.
Anti-electromagnetic interference is an important spacecraft reliability design, good grounding system is to protect the stability of the circuit. Ground only
It is an important measure of spacecraft electromagnetic compatibility, and avoid pyrotechnic and explosive fuel and other dangerous goods by mistake, wrong fuel, protect the personal safety of important
Measures. Thus, the present standard can avoid detours or instructional designer for a major accident, to improve spacecraft reliability and security play an important
effect.
Spacecraft grounding requirements
1 Scope
This standard specifies the spacecraft equipment, as well as its ground test system grounding requirements.
This standard applies to the ground spacecraft design, and spacecraft testing, assembly, transportation and other ground implementation.
2 spacecraft lap grounding requirements
2.1 Structure Bonding Requirements
Lap structure requirements are as follows.
Should overlap between a) spacecraft metal structure, overlapping DC resistance (hereinafter referred to as the lap resistance) should be less than 5mΩ.
b) electrically conductive structural member of the composite material (e.g. carbon fiber) and the structure to be lap, the lap resistance should be less than 1kΩ.
It should overlap between c) carbon fiber instrument installation lap resistance should be less than 10mΩ.
d) extravehicular equipment should be well-structured and spacecraft lap, lap resistance should be less than 10mΩ.
Each lap resistance Cabin abutment surfaces e) multi-cabin of the spacecraft should be less than 5mΩ.
f) ground pile spacecraft main structure of the spacecraft main ground piles. Spacecraft in ground testing, storage, transportation, transport, filling, from the
Cranes and other occasions, through a dedicated ground line (total cross-sectional area of \u200b\u200bnot less than 4.7mm2 multi-strand copper wire or copper wire braid) will be the main ground pile
Connection with the site or technology to signal ground piles. Ground resistance grounding and bonding the pile should be less than 1Ω.
2.2 lap thermal control material requirements
2.2.1 multilayer insulation assembly
Lap multilayer insulation assembly requirements are as follows.
a) bonding and grounding resistance. conductive organ blade embedded in each layer of the multilayer insulation assembly, blade play a central location
Φ4mm a through hole for caulking; required to take a piece of wire, welding wire ends of each one-way lug, lug and a nearby
Ground pile connection; hollow copper rivets and the other lug organ blade, multi-layer insulation components riveted together to ensure electrical lap
Resistance is less than 10Ω.
b number) lap point. an area smaller than 0.05m2 multilayer insulation component should be at least a ground area of \u200b\u200bmore than more of 0.05m2
Layer insulation should be at least two components of ground, for multi-layer insulation assembly elongate, approximately every 500mm set up a connection
location.
c) overlapping position. grounding edge multilayer pitch of about 10mm.
2.2.2 secondary surface mirror (OSR sheet)
Metal part of the secondary mirror surface with a conductive adhesive connection with the structure, the DC resistance of the metal part and structurally secondary surface mirror between 5Ω ~ 10Ω.
Lap 3 spacecraft grounded piece of equipment requirements
3.1 Spacecraft Structure on lap spacecraft equipment requirements
By single pile grounding, grounding wire or mounting surface and fasteners, overlapping with the spacecraft structure, to achieve equipment chassis ground. Equipment and Space
Resistance between overlapping structure should be less than 10mΩ.
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