Abstract: As the core of the rocket system, the performance and quality of rocket engines are of paramount importance. Currently, the production of aerospace model rocket engines does not differentiate the production and selection of motors according to the importance of the mission, which is insufficient to ensure the high reliability requirements of important launch missions. To select rocket engines with better performance quality for more critical launch missions, this paper uses fuzzy comprehensive evaluation and TOPSIS methods based on the test value or assessment information of evaluation indicators. The method scientifically and accurately ranks the performance quality of rocket engines, choosing the engines with better performance quality for more strategic missions, and providing technical support for national management decisions.

Key words: rocket engine, fuzzy comprehensive evaluation, TOPSIS, quality assessment