Abstract: The analysis of the problem of real-time communication on CAN bus was proposed using dSPACE simulator, and the solution was proposed. The CAN communication model based on dSPACE was designed using the methods of Interrupt or Enable to trigger the action. The spacecraft subsystem simulation model was built on the dSPACE, and the real-time communication was performed following the spacecraft CAN bus communication protocol, to implement the communication with large amount of data between subsystem simulation model and data handling subsystem. The simulation result verifies the validity of the communication method.

Key words: dSPACE, real-Time simulation, CAN communication, trigger method