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JJG 948-2018: Electrodynamic Vibration Testing Systems
Status: Valid JJG 948: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| JJG 948-2018 | English | 809 |
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Electrodynamic Vibration Testing Systems
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JJG 948-2018
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| JJG 948-1999 | English | RFQ |
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Verification regulation of digital electrodynamic vibration testing system
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JJG 948-1999
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PDF similar to JJG 948-2018
Basic data | Standard ID | JJG 948-2018 (JJG948-2018) | | Description (Translated English) | Electrodynamic Vibration Testing Systems | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A53 | | Word Count Estimation | 35,336 | | Date of Issue | 2018-02-27 | | Date of Implementation | 2018-08-27 | | Older Standard (superseded by this standard) | JJG 948-1999; JJG 190-1997 | | Quoted Standard | JJF 1156; GB/T 7670-2009 | | Regulation (derived from) | AQSIQ Announcement No. 26 of 2018 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine | JJG 948-2018: Electrodynamic Vibration Testing Systems---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.
(Electrical vibration test system verification procedures)
National Metrology Verification Regulations of the People's Republic
Electric vibration test system
Published on.2018-02-27
2018-08-27 implementation
The General Administration of Quality Supervision, Inspection and Quarantine issued
Electric vibration test system verification procedures
Replace JJG 948-1999
JJG 190-1997
Focal Point. National Vibration Shock Velocity Measurement Technical Committee
Main drafting unit. AVIC Beijing Great Wall Metrology and Testing Technology Research Institute
China Institute of Metrology
Participated in the drafting unit. Beijing Zhongyuan Huan Test Electromechanical Equipment Technology Co., Ltd.
Suzhou Dongling Vibration Test Instrument Co., Ltd.
Suzhou Su Test Equipment Co., Ltd.
The Fifth Institute of Electronics, Ministry of Industry and Information Technology
This regulation entrusts the National Vibration Shock Velocity Measurement Technical Committee to explain
The main drafters of this specification.
Wang Xianwei (China Aviation Industry Beijing Great Wall Measurement and Testing Technology Research Institute)
Zeng Wu (China Aviation Industry Beijing Great Wall Metrology and Testing Technology Research Institute)
Cai Chenguang (China Institute of Metrology)
Participate in the drafters.
Zhang Yue (Beijing Zhongyuan Huan Test Electromechanical Equipment Technology Co., Ltd.)
Jiang Yuntai (Suzhou Dongling Vibration Test Instrument Co., Ltd.)
Li Ping (Suzhou Su Test Equipment Co., Ltd.)
Zheng Shuli (Electronics Fifth Institute of the Ministry of Industry and Information Technology)
table of Contents
Introduction (II)
1 Scope (1)
2 References (1)
3 Overview (1)
4 Metrology performance requirements (1)
4.1 Vibration Controller (1)
4.2 Sinusoidal vibration (2)
4.3 Random vibration (3)
4.4 Sinusoidal plus broadband random vibration (5)
4.5 Narrowband Random Plus Wideband Random Vibration (5)
4.6 Classic Impact (5)
5 General technical requirements (5)
5.1 Appearance requirements (5)
5.2 Other technical requirements (5)
6 measuring instrument control (6)
6.1 Verification conditions (6)
6.2 Verification project (6)
6.3 Verification method (7)
6.4 Processing of verification results (17)
6.5 Verification cycle (17)
Appendix A Test of Random Signals (18)
Appendix B Certification Certificate Page Format (22)
Appendix C Format of the results of the verification result notice (24)
Appendix D Verification Record Format (25)
Introduction
This procedure is based on JJF1002-2010 “Rules for the preparation of national metrological verification procedures”. This procedure is correct
JJG 948-1999 has been revised to cover the content of JJG 190-1997. To meet GB/T 2423
Environmental Testing Standards for Industrial Electronic Products and GJB150A Environmental Testing Methods for Military Equipment
In addition to the editorial changes, the main technical changes in this procedure are as follows.
--- Change the original name "Digital Electric Vibration Test System" to "Electric Vibration Test System";
--- Cancel the limitation of the vibration table thrust in the original procedure;
--- Increased the requirements for random vibration table top uniformity and lateral vibration ratio;
--- Part of the measurement performance requirements have been adjusted.
This procedure replaces JJG 948-1999 and JJG 190-1997.
The previous versions of JJG 190-1997 were released.
---JJG 190-1987.
Electric vibration test system verification procedures
1 Scope
This procedure is applicable to the first verification, subsequent verification and making of the electric vibration test system (hereinafter referred to as the test system).
Check in use.
2 reference files
This procedure refers to the following documents.
JJF1156 Vibration Shock Velocity Measurement Terms and Definitions
GB/T 7670-2009 Electric vibration generating system (equipment) Performance characteristics
For dated references, only the dated version applies to this Code; any undated quotation
The latest version (including all amendments) applies to this procedure.
3 Overview
The electric vibration test system is used to generate different vibration and shock excitations according to the test standard requirements (such as sinusoidal vibration).
Dynamic, random vibration, sinusoidal plus wideband random vibration, narrowband random plus wideband random, classical shock, shock response spectrum
Etc.) Dynamic mechanical environment testing equipment. As shown in Figure 1, it is usually composed of a digital vibration controller, electric vibration
It consists of a station, a power amplifier, a control accelerometer and other ancillary equipment.
Figure 1 Schematic diagram of the test system
4 Metrological performance requirements
This procedure covers the measurement performance requirements of various functions of the test system, if the test system is only partially
For functions, performance verification must be performed on all functions contained in the system. For example, if there is only a sinusoidal vibration function, it must be
All sinusoidal vibration functions are checked for performance.
4.1 Vibration controller
4.1.1 The vibration controller has the frequency indication error in the specified frequency range as shown in Table 1.
Table 1 Frequency indication error
Frequency range A grade B grade C grade
f < 100Hz ±0.05Hz ±0.1Hz ±0.5Hz
f ≥100Hz ±0.05% ±0.1% ±0.5%
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