We have designed a technology for creation of the space systems' onboard equipment simulation problem-oriented infrastructure, based on the Simulation Model Portability standard. The simulation infrastructure is a software environment allowing to create, integrate and use simulation models of different purpose including those of different manufacturers'.The infrastructure includes software components, specifications, simulation models and the results of tests, as well as the knowledge bases consolidating knowledge and experience of the experts in space systems' onboard equipment creation. Our product will help to increase the quality and validity of designer solutions at different stages of the space equipment production lifecycle.