Applications Products Services Support About EuroSim
ObjectiveThe objective of the PACS real-time test bench is to perform real-time closed-loop performance tests of a global guidance algorithm for fine pointing of an agile spacecraft attitude control and measurement system (ACMS). For that purpose, a dynamic Real-Time Test Bench (RTTB) has been developed by the National Aerospace Laboratory (NLR). This facility uses to a maximum extent auto-coded software components from Matlab/Simulink sources, for both on-board software and real-time simulation.
ContextThe PACS study has been conducted by Alcatel Space Industries (France) as prime contractor. It constitutes a major milestone for the ACMS development of the future high-resolution earth observation Satellites that require both a high agility of the line-of-sight and a very fine pointing and stability. It offers the opportunity to implement, test and validate a complete ACMS based on Control Momentum Gyros (CMG).
The development of the ACMS simulation, on-board software, and RTTB resulted in the successful achievement of a test bench, operating with hardware-in-the-loop at a closed-loop frequency of 96Hz. Other achievements:
Role of EuroSimThe Real-Time Simulator, part of the RTTB, is based on EuroSim and contains simulation models, previously created in Simulink/Stateflow and converted to C-code with the tool Real Time Workshop (RTW).