Chinese Military Standard GJB151
The National Military Standard (GJB) is primarily applied to electronic equipment across various military branches including the Army, Navy, Air Force, Space Force, and Rocket Force. Its testing framework centers on two critical domains: Electromagnetic Compatibility (EMC) and Reliability. Based on the prevailing standards GJB 151B-2013 ("Electromagnetic Emission and Susceptibility Requirements and Measurements for Military Equipment and Subsystems") and its associated standard GJB 150A-2009 ("Laboratory Environmental Test Methods for Military Materiel"), the following section provides a detailed listing and description of relevant test items using professional terminology. GJB 151B-2013 testing services are usually provided by third-party testing agencies with relevant qualifications. These agencies usually have military confidentiality qualifications, CNAS (China National Accreditation Service for Conformity Assessment) qualifications, CMA (China Metrology Certification) qualifications, and DILAC (Defense Science and Technology Industry Laboratory Accreditation Board) qualifications, etc. These qualifications prove the professionalism and authority of the testing agency and ensure the accuracy and recognition of its test results.
1. Electromagnetic Compatibility (EMC) Testing (GJB 151B)
GJB 151B defines electromagnetic emission and susceptibility requirements for military electronic systems. Its fundamental principle mandates that equipment must neither emit disruptive interference nor be vulnerable to external electromagnetic disturbances. Test applicability varies by platform (naval vessels, submarines, aircraft).
Electromagnetic Emission (EMI) Tests
| Item | Description |
|---|---|
| CE101/CE102 | Power lead conducted emissions (LF/HF) |
| CE10 | Antenna port conducted emissions |
| RE101/RE102 | Magnetic/electric field radiated emissions |
| CS101 | Power lead conducted susceptibility (LF) |
| CS114 | Bulk cable injection susceptibility (core test) |
| RS101/RS103 | Magnetic/electric field radiated susceptibility |
Additional tests include CS115 (pulse excitation), CS116 (damped sinusoids), and RS105 (transient EM field).
2. Reliability Testing (GJB 150A)
GJB 150A validates equipment performance under extreme environmental conditions through simulated lifetime stress exposure.
Environmental Test Categories
Climatic: Temperature extremes, thermal shock, damp heat, salt fog, solar radiation
Mechanical: Vibration (sinusoidal/random), shock, bump, acceleration
Composite: Fungus, sand/dust, rain, low pressure
3. Military Test System Requirements
Key Principles
Six Military Characteristics: Reliability, Testability, Maintainability, Supportability, Safety, Environmental Adaptability
Production Screening: 100% environmental stress screening (ESS)
Qualification Process: Comparative testing → Qualification testing → Acceptance testing
4. Test Failure Consequences
Contract termination and financial penalties
Supplier qualification revocation
Potential legal/criminal liability
R&D investment loss
5. Private Sector Considerations
Challenges
Technical compliance with military standards
Certification acquisition ("Three Certifications")
Cultural alignment with military systems
Extended development cycles
Opportunities
Stable long-term defense contracts
Technology transfer to commercial products
Policy support for private participation
Niche market specialization potential
This condensed version maintains all technical content while reducing verbiage through consolidated descriptions and bullet-point formatting.
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