Model-Based Avionics Systems Fault Simulation and Detection
Raj M. Bharadwaj, Chetan S. Kulkarni, Gautam Biswas, Kyusung Kim · AIAA Infotech@Aerospace 2010 · 2010
In integrated modular avionics making distinctions between hardware and software faults is not easy. Interactions and propagation of fault effects complicate the fault detection and isolation task. Avionics systems combine physical processes, computational hardware, and software systems, and present unique challenges to performing root cause analysis when faults occur, and then establishing the effects of faults on overall system behavior and performance. However, systematic analyses of these conditions are important for establishing overall flight safety. This paper proposes a model based approach to study the fault propagation and fault detection in an integrated avionics system. The failures of power supply module, GPS, and Integrated Navigation Solution (INAV) are simulated and the fault detection and isolation methods are discussed. Sample case studies illustrate the effectiveness of our approach.