Aerospace Field

Multi-disciplinary Unified Modeling and System Linkage Simulation Analysis of Satellite Solutions

Case background

The client is mainly responsible for the spacecraft’s overall design, and its main business includes task analysis, overall scheme design (including scheme design, overall performance parameter decomposition and integration, orbit design, subsystem design requirements, kinetics analysis and flight scheme design) and overall detailed design. The overall design takes a leading role during the aircraft development, and playing a holistic and pioneering role for finalizing the overall picture, plan and making decisions. Therefore, the overall design level performance will directly affect the function, performance, development cycle and cost of the spacecraft.

In light of the overall function and performance of the spacecraft, the overall design is performed with full considering the interconnection and coordination between the various subsystems. Technical analysis on system decomposition and integration, the interconnection, interaction and coordination of the subsystems, and the scientific analysis and calculation on decomposition and integration are also included to optimize the balance between the system design and technic requirement, to realize the desired system functions and performance, and to maximize economic effectiveness.We should grasp the interconnection and coordination between the various subsystems and carry out the overall design in light of the overall function and performance of the spacecraft, and perform technical analysis on system split and synthesis. Based on the interconnection, interaction and coordination of the subsystems, we should optimize the system design to fulfill the desired system functions and performance and maximize benefits.

As the composition and functions of the space station system become more complex, the multi-disciplinary coupling relationship is getting closer and closer, and a consensus has been reached on the need of comprehensive verification of system disciplines. It’s pressing to build a digital spacecraft with the purpose of supporting the design and simulation verification of subsystem specific scheme, flight scheme and overall system scheme. , which fulfills the purpose to conduct a rapid, comprehensive, precise system verification in the early stageWe should carry out a precise and comprehensive system design verification as early as possible and, and to achieve a virtuous cycle by knowledge accumulation.

Case description

The scale of the space station system is massive. Therefore, based on the Modelica modeling language, the kinetics and control, energy, environment thermal control, propulsion, information, digital control and measurement control subsystem of the space station core cabin, test cabin I and test cabin II have been established on the MWorks platform. The typical working conditions of the subsystems separately undergo the simulation analysis. An in-depth comprehensive system-level analysis verification has been conducted on the single cabin, double cabins and three cabins of the space station under all working conditions, as well as the analysis and verification on rendezvous and docking, transposition and other scenarios, realizing system- level, complete boundary and total condition analysis verification.

Practice and effect