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Position: Chinese Standard in English/QJ 20422.4-2016
QJ 20422.4-2016   Environment test methods for spacecraft unit- Part 4: Magnetic test (English Version)
Standard No.: QJ 20422.4-2016 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 8500 words Price(USD):400.0 remind me the price change

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Implemented on:2016-3-1 Delivery: via email in 1 business day
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Standard No.: QJ 20422.4-2016
English Name: Environment test methods for spacecraft unit- Part 4: Magnetic test
Chinese Name: 航天器组件环境试验方法 第4部分:磁试验
Professional Classification: QJ    Professional Standard - Aerospace
Issued on: 2016-01-19
Implemented on: 2016-3-1
Status: valid
Superseding:QJ 2630.4-1996 Space encironment test methods for satellite components.Megnetic test
Language: English
File Format: PDF
Word Count: 8500 words
Price(USD): 400.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. QJ 20422-2016 consists of the following parts under the general title Environment test methods for spacecraft unit: ——Part 1: Surface charging and discharging test; ——Part 2: Atomic oxygen test; ——Part 3: Solar ultraviolet irradiation test; ——Part 4: Magnetic test; ——Part 5: Vacuum cold welding test; ——Part 6: Acceleration test; ——Part 7: Vibration test; ——Part 8: Acoustic test; ——Part 9: Shock test. This is Part 4 of QJ 20422-2016. This part replaces QJ 2630.4-1996 Space environment test methods for satellite components - Magnetic test. The following main changes have been made with respect to QJ 2630.4-1996: a) the "satellite" in the standard name and text is modified to "spacecraft"; b) the magnetic compensation test method is added; c) several terms are modified, added and quoted; d) the clause "Test items and purposes" is added; e) the clause "Environmental magnetic field conditions" is modified; f) the requirements for data acquisition system are added; g) the clause "Test documents" is modified; h) the arrangement of magnetometer probes in the magnetic moment measurement method is changed; i) the precision requirements of measuring instruments are modified; j) the requirements for parameters such as magnetic induction intensity and time of magnetizing and demagnetizing are modified. Annex A of this part is normative. This part was proposed by China Aerospace Science and Technology Corporation. This part is under the jurisdiction of China Astronautics Standards Institute. This part was issued in March 1996 for the first time. Environment test methods for spacecraft unit - Part 4: Magnetic test 1 Scope This part specifies the test items and purposes, laboratory environment, test requirements, test procedures, test interruption and handling, test documents, etc. of the magnetic test of spacecraft unit-level products. This part is applicable to the magnetic test of spacecraft unit-level products in zero magnetic field environment. It may be referred to by the magnetic test of spacecraft parts and components. 2 Terms and definitions For the purposes of this part, the following terms and definitions apply. 2.1 zero magnetic field magnetic field with the magnetic induction intensity less than 5nT in the center of the homogeneous space of the main coil 2.2 stray magnetic field magnetic field existing when the test piece is working in the zero magnetic field 2.3 remanent magnetic field magnetic field existing when the test piece is not working in the zero magnetic field 2.4 stray magnetic moment magnetic moment existing when the test piece is working in the zero magnetic field 2.5 remanent magnetic moment magnetic moment existing when the test piece is not working in the zero magnetic field 2.6 magnetic field inhomogeneity absolute value of the difference between the maximum value and the minimum value of the magnetic induction intensity at the same time in a specified space 2.7 homogeneous space of magnetic field space where the magnetic field inhomogeneity is less than the required value 2.8 magnetic field instability change value of the magnetic field in the homogeneous space within the specified time 2.9 main coil device that can offset the geomagnetic field in the center of the coil by adjusting the current in the coil to present a zero magnetic field environment or a stationary magnetic field environment 2.10 magnetizing field DC magnetic field used to magnetize the test piece 2.11 demagnetizing field alternating magnetic field used to make the amplitude of demagnetization of the test piece continuously attenuate to zero 2.12 magnetizing and demagnetizing coils device that can generate the required magnetizing or demagnetizing environment in the center of the coil by adjusting the current in the coil 2.13 magnetic compensation changing the magnetic moment or magnetic field of the test piece by attaching a compensating magnet (permanent magnet) to it 3 Test items and purposes 3.1 Test items The magnetic test items generally include: a) magnetic moment measurement, including remanent magnetic moment measurement and stray magnetic moment measurement;   b) magnetic field measurement, including remanent magnetic field measurement and stray magnetic field measurement; c) magnetizing test; d) demagnetizing test; e) magnetic compensation test. 3.2 Test purposes The purpose of each magnetic test item is as follows: a) magnetic moment measurement: to measure the remanent magnetic moment and stray magnetic moment of the test piece and evaluate whether they meet the design requirements; b) magnetic field measurement: to measure the magnetic field distribution around the test piece or the remanent magnetic field and stray magnetic field at a certain point, and evaluate whether they meet the design requirements; c) magnetizing test: to evaluate the change of remanent magnetic moment or remanent magnetic field after the test piece is magnetized by external magnetic field; d) demagnetizing test: to eliminate the magnetic moment or magnetic field increased when the test piece is magnetized by the external magnetic field; e) magnetic compensation test: to reduce the remanent magnetic moment and remanent magnetic field of the test piece by attaching a compensating magnet to it. 4 Laboratory environment The laboratory environment is generally as follows: a) temperature: 15℃~35℃; b) relative humidity: 20%~80%; c) atmospheric pressure: 78kPa~103kPa; d) cleanliness: Class 100,000.
Foreword I 1 Scope 2 Terms and definitions 3 Test items and purposes 4 Laboratory environment 5 Test requirements 6 Test procedures 7 Test interruption and handling 8 Test documents Annex A (Normative) Data processing method for magnetic moment measurement
Referred in QJ 20422.4-2016:
*YY/T 1794-2021 General technical requirements for dental collagen membrane
*GB/T 39947-2021 Selection and design for food packaging
*GB/T 39892-2021 Specification of reporting and processing of motor vehicle product defect clue
*GJB 9632-2019 Specification for low orbit spacecraft high-voltage power supply system
*GB/T 4214.9-2021 Test method for noise of household and similar electrical appliances—Particular requirements for fans
*GB/T 4214.8-2021 Test method for noise of household and similar electrical appliances—Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these
QJ 20422.4-2016 is referred in:
*GJB 2696-1996 Interface of Ground-base TT&C equipment for missile and spacecraft flight mission
Code of China
Standard
QJ 20422.4-2016  Environment test methods for spacecraft unit- Part 4: Magnetic test (English Version)
Standard No.QJ 20422.4-2016
Statusvalid
LanguageEnglish
File FormatPDF
Word Count8500 words
Price(USD)400.0
Implemented on2016-3-1
Deliveryvia email in 1 business day
Detail of QJ 20422.4-2016
Standard No.
QJ 20422.4-2016
English Name
Environment test methods for spacecraft unit- Part 4: Magnetic test
Chinese Name
航天器组件环境试验方法 第4部分:磁试验
Chinese Classification
Professional Classification
QJ
ICS Classification
Issued by
Issued on
2016-01-19
Implemented on
2016-3-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
QJ 2630.4-1996 Space encironment test methods for satellite components.Megnetic test
Language
English
File Format
PDF
Word Count
8500 words
Price(USD)
400.0
Keywords
QJ 20422.4-2016, QJ/T 20422.4-2016, QJT 20422.4-2016, QJ20422.4-2016, QJ 20422.4, QJ20422.4, QJ/T20422.4-2016, QJ/T 20422.4, QJ/T20422.4, QJT20422.4-2016, QJT 20422.4, QJT20422.4
Introduction of QJ 20422.4-2016
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. QJ 20422-2016 consists of the following parts under the general title Environment test methods for spacecraft unit: ——Part 1: Surface charging and discharging test; ——Part 2: Atomic oxygen test; ——Part 3: Solar ultraviolet irradiation test; ——Part 4: Magnetic test; ——Part 5: Vacuum cold welding test; ——Part 6: Acceleration test; ——Part 7: Vibration test; ——Part 8: Acoustic test; ——Part 9: Shock test. This is Part 4 of QJ 20422-2016. This part replaces QJ 2630.4-1996 Space environment test methods for satellite components - Magnetic test. The following main changes have been made with respect to QJ 2630.4-1996: a) the "satellite" in the standard name and text is modified to "spacecraft"; b) the magnetic compensation test method is added; c) several terms are modified, added and quoted; d) the clause "Test items and purposes" is added; e) the clause "Environmental magnetic field conditions" is modified; f) the requirements for data acquisition system are added; g) the clause "Test documents" is modified; h) the arrangement of magnetometer probes in the magnetic moment measurement method is changed; i) the precision requirements of measuring instruments are modified; j) the requirements for parameters such as magnetic induction intensity and time of magnetizing and demagnetizing are modified. Annex A of this part is normative. This part was proposed by China Aerospace Science and Technology Corporation. This part is under the jurisdiction of China Astronautics Standards Institute. This part was issued in March 1996 for the first time. Environment test methods for spacecraft unit - Part 4: Magnetic test 1 Scope This part specifies the test items and purposes, laboratory environment, test requirements, test procedures, test interruption and handling, test documents, etc. of the magnetic test of spacecraft unit-level products. This part is applicable to the magnetic test of spacecraft unit-level products in zero magnetic field environment. It may be referred to by the magnetic test of spacecraft parts and components. 2 Terms and definitions For the purposes of this part, the following terms and definitions apply. 2.1 zero magnetic field magnetic field with the magnetic induction intensity less than 5nT in the center of the homogeneous space of the main coil 2.2 stray magnetic field magnetic field existing when the test piece is working in the zero magnetic field 2.3 remanent magnetic field magnetic field existing when the test piece is not working in the zero magnetic field 2.4 stray magnetic moment magnetic moment existing when the test piece is working in the zero magnetic field 2.5 remanent magnetic moment magnetic moment existing when the test piece is not working in the zero magnetic field 2.6 magnetic field inhomogeneity absolute value of the difference between the maximum value and the minimum value of the magnetic induction intensity at the same time in a specified space 2.7 homogeneous space of magnetic field space where the magnetic field inhomogeneity is less than the required value 2.8 magnetic field instability change value of the magnetic field in the homogeneous space within the specified time 2.9 main coil device that can offset the geomagnetic field in the center of the coil by adjusting the current in the coil to present a zero magnetic field environment or a stationary magnetic field environment 2.10 magnetizing field DC magnetic field used to magnetize the test piece 2.11 demagnetizing field alternating magnetic field used to make the amplitude of demagnetization of the test piece continuously attenuate to zero 2.12 magnetizing and demagnetizing coils device that can generate the required magnetizing or demagnetizing environment in the center of the coil by adjusting the current in the coil 2.13 magnetic compensation changing the magnetic moment or magnetic field of the test piece by attaching a compensating magnet (permanent magnet) to it 3 Test items and purposes 3.1 Test items The magnetic test items generally include: a) magnetic moment measurement, including remanent magnetic moment measurement and stray magnetic moment measurement;   b) magnetic field measurement, including remanent magnetic field measurement and stray magnetic field measurement; c) magnetizing test; d) demagnetizing test; e) magnetic compensation test. 3.2 Test purposes The purpose of each magnetic test item is as follows: a) magnetic moment measurement: to measure the remanent magnetic moment and stray magnetic moment of the test piece and evaluate whether they meet the design requirements; b) magnetic field measurement: to measure the magnetic field distribution around the test piece or the remanent magnetic field and stray magnetic field at a certain point, and evaluate whether they meet the design requirements; c) magnetizing test: to evaluate the change of remanent magnetic moment or remanent magnetic field after the test piece is magnetized by external magnetic field; d) demagnetizing test: to eliminate the magnetic moment or magnetic field increased when the test piece is magnetized by the external magnetic field; e) magnetic compensation test: to reduce the remanent magnetic moment and remanent magnetic field of the test piece by attaching a compensating magnet to it. 4 Laboratory environment The laboratory environment is generally as follows: a) temperature: 15℃~35℃; b) relative humidity: 20%~80%; c) atmospheric pressure: 78kPa~103kPa; d) cleanliness: Class 100,000.
Contents of QJ 20422.4-2016
Foreword I 1 Scope 2 Terms and definitions 3 Test items and purposes 4 Laboratory environment 5 Test requirements 6 Test procedures 7 Test interruption and handling 8 Test documents Annex A (Normative) Data processing method for magnetic moment measurement
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