A Reliability Evaluation Method for Space Orbit Control Engines

Abstract

The invention discloses a method for evaluating the reliability of a space orbit control engine, comprising the following steps: step 1, proposing a design scheme of a space orbit control engine; step 2, identifying the weak link of the engine reliability; step 3, targeting the weak link of the engine Carry out special reliability test; Step 4, evaluate the reliability of weak links; Step 5, carry out the reliability verification of the whole engine, and the engine reliability verification is integrated into the verification test of the engine design scheme and the environmental verification test; Step 6, Evaluate engine reliability. The invention has the following advantages: 1) reducing the number of reliability tests and the number of engine sub-samples; 2) reducing the cost of reliability test verification of the rocket engine; 3) shortening the development cycle of the rocket engine; 4) low carbon emission reduction, green and environmental protection.

Description

technical field [0001] The invention relates to the technical field of spacecraft propulsion systems, in particular to a reliability evaluation method for a space orbit control engine. Background technique [0002] The space orbit control engine is the heart of the upper stage of the launch vehicle and the spacecraft such as the satellite. It provides power for the spacecraft to change the orbit and adjust the attitude. Generally, it has the functions of two-way swing, multiple starts, and long-term on-orbit. The reliability of the engine is directly related to the success or failure of the launch and flight of the spacecraft. [0003] The inherent reliability of the engine is designed, but it is also verified by the production guarantee and test. It must pass enough test time and number of tests to fully expose the defects and weak links of the engine in design, process and raw material selection, and pass the test. Continuous improvement achieves the purpose of improving ...

AI Technical Summary

Problems solved by technology

Although the multi-sample engine reliability thermal test accumulation method is beneficial to the adequacy and authenticity of the space orbit control engine reliability verification, it has the following disadvantages: 1) The test cost is high; 2) The test cycle is very long; 3) It is easy to introduce Low-level quality problems; 4) A large amount of propellant combustion increases atmospheric carbon emissions, which is not conducive to atmospheric environmental protection. For conventional propellants, a large amount of toxic gases will be produced

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