Multi-domain modeling of missile power distribution system and development of simulation platform based on FMI standard

Multi-tool modeling and co-simulation of complex systems is a difficult problem. The missile power distribution system is a typical multidisciplinary combination of electrical, mechanical, dynamic, magnetic and cybernetics. Traditional professional software can only simulate a specific domain model. In order to study the coupling characteristics of the missile system and verify the rationality of the system model design, a multi-domain model simulation tool is needed. This paper proposes a multi-domain simulation method based on FMI (Functional Mock-up Interface) to simulate complex systems. It can use the advantages of different software and its professional model library, and overcome the difficulty of multi-source model co-simulation in the process of complex system development. This paper makes study in two aspects. On the one hand, the missile electrical characteristics are taken as the research object, the missile system is analyzed and decoupled according to the function. The missile subsystem models are established by using different professional software, and then the original model of the subsystem is converted into an FMU (Functional Mock-up Unit) model that conforms to the FMI standard. On the other hand, a simulation platform supporting the FMI standard was developed for co-simulation of the entire missile power distribution system. Finally, the simulation results show the correctness of the FMI based simulation scheme and the effectiveness of the simulation platform.