In the field of national defense science and technology, power system, as the basic guarantee of all kinds of equipment, the stability and reliability of its performance are directly related to the normal operation and operational efficiency of military equipment. In order to ensure that power supply equipment meets the stringent military requirements, China's national military standard (GJB) has formulated a series of specifications, among which GJB power supply standard-full name GJB181, is specifically aimed at power system, it has important technical guiding significance. This article will introduce in detail the content, technical requirements and practical application of GJB181 standard in the field of military power supply to help readers fully understand the connotation and function of this key standard.

I. Overview of GJB power standard (GJB181)

as an important part of China's military standard system, GJB181 specifically defines the design, testing and acceptance specifications of military power supply equipment. This standard aims to ensure that military power supply can stably and reliably provide power support for all kinds of military electronic equipment in complex and changeable combat environment.

As the "heart" of military equipment, the performance of power supply directly affects the overall combat capability of the equipment. GJB181 unifies the basic performance index, environmental adaptability and safety requirements of military power supply through the technical specifications of the system, providing clear technical basis for power supply manufacturers and military users.

II. Main technical contents of GJB181 standard

GJB181 standard covers military power supply equipmentRequirements, performance indicators, environmental adaptability testing, reliability assessment and safety assurance, etc. The following are the core technical contents of this standard:

1. Power performance indicators

GJB181 specifies the input and output characteristics of the power supply in detail to ensure that the power supply can meet the power demand of military electronic equipment. Including stable output voltage and current, low ripple and noise level, high efficiency and good load regulation capability.

• Output voltage stability: military power supply must keep the output voltage stable under various load conditions to avoid downstream equipment failure or performance degradation caused by voltage fluctuation.
• Ripple and noise control: the voltage ripple and electrical noise in the power output must be controlled within strict limits to prevent interference with the normal operation of sensitive electronic equipment.
• Efficiency Requirements: high efficiency design not only reduces energy consumption, but also reduces calorific value and improves the reliability of the overall system.

2. Environmental adaptability test

military power supply must maintain stable operation under extreme environmental conditions. GJB181 provides a variety of environmental testing methods, including temperature cycling, damp-heat test, dustproof and waterproof capability, EMC electron magnetic compatibility (EMC) test, etc.

• Temperature Range: The standard specifies the upper and lower limits of the working temperature that the power supply can adapt to, ensuring that it can work normally in severe cold, high temperature or temperature dramatic environment.
• Humidity tolerance: the power supply must pass the high humidity environment test to prevent the circuit from short circuit or performance attenuation caused by moisture.
• Electromagnetic compatibility: power supply equipment should have good anti-interference ability to avoid electromagnetic interference (EMI) affecting the normal operation of itself and peripheral equipment.

3. Reliability and life

GJB181 imposes strict requirements on the reliability of power supply equipment, covering life testing, failure rate assessment and maintenance convenience. Through the accelerated life test, the stability and safety of the power supply in long-term use are verified.

• Life Test: evaluate the service life of the power supply by simulating the continuous operation under actual use conditions to ensure that it meets the long-term service requirements of military equipment.
• Failure rate control: The standard limits the allowable failure rate to ensure the high reliability of the overall power supply system.
• Maintenance Design: The structural design of the power supply should facilitate quick overhaul and replacement of key components, reduce maintenance time and improve the combat continuity capability of the equipment.

4. Safety Performance specifications

in the design process of military power supply, multiple security measures must be considered to prevent equipment damage or safety accidents caused by abnormal conditions such as overload, short circuit and over temperature. GJB181 has detailed requirements on the design and safety test of protection circuit.

• Overload protection: The power supply should have automatic detection and protection functions to prevent damage caused by abnormal load.
• Short circuit protection: ensure that the power supply can cut off the output quickly during short circuit to ensure the safety of equipment and personnel.
• Over-temperature protection: Built-in temperature monitoring and control mechanism to prevent faults caused by overheating.

III. Application value of GJB181 standard in military power supply field

GJB181 standard not only provides technical specifications for the design and manufacture of military power supply, but also plays an important role in practical application.

1. Ensure the stable operation of military equipment

power supply equipment conforming to GJB181 can effectively adapt to the complex and changeable environmental conditions in military operations, and ensure the continuous power supply of key equipment such as communication system, radar, navigation equipment and weapon control system, improve the overall operational efficiency.

2. Improve the versatility and interchangeability of power supply equipment

unified standards and specifications promote the compatibility and interchangeability of products among different suppliers, facilitate the military to quickly replace and expand equipment during equipment maintenance and upgrade, and reduce the complexity of logistics support.

3. Reduce maintenance costs and improve security

through standardized testing and design requirements, GJB181 significantly improves the reliability and safety performance of power supply, reduces the frequency of failure and maintenance difficulty, and ensures the safety of personnel and equipment.

4. Promote the quality management of military manufacturing

GJB181, as a mandatory military standard, promotes power supply manufacturing enterprises to strictly implement quality control procedures, improve product quality, and ensure high-standard production of military power supply equipment.

GJB power supply as a key component of China's national military standard system, GJB181 comprehensively regulates the design, performance, environmental adaptability, reliability and safety of military power supply equipment. Through strict technical indicators and testing requirements, GJB181 ensures that military power supply has high stability and high reliability in complex and harsh military environment, and ensures the normal operation of all kinds of military equipment.