Operating life expectancy verification for the spacecraft equipment

The main methods for assessing and confirming the reliability indicators of on-board equipment of promising long-term spacecraft are analyzed. The possibility of choosing a calculations and tests method for matching onboard equipment to resource requirements is considered. The calculations and tests method is used to reduce the time required to create onboard equipment, the volume and duration of life tests, as well as financial costs. At the same time, tests for resource and persistence are carried out only on the components of the on-board equipment, subject to wear and degradation of parameters and having elements that are critical in terms of resource and persistence. For the rest of the equipment (mainly electronic, electrical, electromagnetic), which includes highly reliable groups of devices with a reserve, the resource requirements and preservation are confirmed by the results of the analysis to ensure the resource and preservation based on guarantees and data on the used electronic component base, components and materials, as well as assessing the possibility of degradation of characteristics during operation for the intended purpose during the entire period of active existence, taking into account the analysis of the worst case and the available developments of analogues and prototypes. Proposals have been formulated on the procedure for planning the life tests of onboard equipment for long-term spacecraft.