GB/T 40519-2021 in English
VALIDDesign requirements for atomic oxygen protection of spacecraft
- Issued on:2021-08-20
- Implemented on:2022-03-01
- File Format:PDF
- Delivery:Within 1 day
$125.00
《GB/T 40519-2021航天器原子氧防护设计要求》由TC425（全国宇航技术及其应用标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Analysis of the core content of the standard
This standard systematically constructs the technical framework for the design of atomic oxygen protection for spacecraft for the first time, focusing on the atomic oxygen oxidation and erosion problems faced by low-orbit spacecraft in the 200-800km altitude range, and proposes a hierarchical protection system. The atomic oxygen integral flux calculation formula Φ=N·v·t·cosθ reflects the coupling relationship between orbital altitude, flight attitude and material life.
Key technologies of protection design
| Design level | Key indicators | Typical measures |
|---|---|---|
| System level | Windward surface area ratio ≤15% | Configuration optimization, sensitive components layout |
| Subsystem level | Erosion rate ≤1μm/year | Multi-layer composite protection, redundant design |
| Material level | Mass loss rate ≤10-24cm3/atom | Silicon-based coating, polyimide modification |
Verification Test Specifications
The standard requires the use of beam-type atomic oxygen equipment for verification, and the test pressure ≤10Pa corresponds to the space environment background. Taking a certain type of solar array as an example, its substrate material needs to pass an equivalent on-orbit test with a cumulative flux ≥1×1021atoms/cm2, and the optical transmittance attenuation should be controlled within ±5% of the initial value.
Implementation recommendations
- New models should complete three-dimensional simulation of atomic oxygen environment and establish a material database during the proposal stage
- Prioritize the use of mature materials that have been verified by flights such as the Shijian-10 satellite
- Establish an on-orbit performance degradation model for protective coatings to support life prediction
Technology evolution analysis
Compared with European and American standards, this standard innovatively proposes the concept of a dynamic protection factor, taking into account the impact of the solar activity cycle on the atomic oxygen flux. With the development of reusable spacecraft, it will be necessary to supplement the cumulative effect assessment method of multiple round trips to the atmosphere in the future.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 40513-2021 in English
Contamination control requirements for spacecraft optics remote instrument
2021-08-20 -
GB/T 38905-2020 in English
Type designation for civil unmanned aircraft system
2020-07-21 -
GB/T 34509.2-2017 in English
In-orbit field radiometric calibration for optical remote sensor of land observation satellite-Part 2:Thermal infrared
2017-11-01 -
GB/T 42178-2022 in English
Interface requirements for cargo egress and ingress by airlock module of space station
2022-12-30
