Abstract:

In order to realize the fast design and verification of the complex spacecraft guidance navigation and control (GNC) system, speed up the translation process of the GNC system from the algorithm design to the product realization, solve the problem of the digital simulation results inconsisted with the physical simulation. The onboard computer prototype is realized by using the virtual processor core and the hardware interface, which solves the problem of the GNC on-board software code development without the physical computer. Simulink/Matlab is used to simulate the dynamic and kinematic modeling of the spacecraft and the digital model of GNC measuring and executing components. Based on the real time extension (RTX) system and function hardware boards, the conversion from the digital model to the physical product is realized. The application examples show that the simulation data of the GNC simulation system based on the onboard system in the loop are highly consistent with the data of GNC physical simulation based on hardware in the loop, which confirms the validity of this simulation system design. At the same time, based on the simulation system, the GNC system software, the algorithm and the parallel development of products can be realized. The simulation system has the advantages of shorter cycle and lower cost by contrast with conventional GNC development.