Bond Graph Based Fault Diagnosis of 4W-Vehicles Suspension Systems: Passive Suspensions

LUIS SILVA; DIEGO DELARMELINA; SERGIO JUNCO; NACER K. MSIRDI; HASSAN NOURA

San Diego, California, U.S.A.

Conferencia; International Conference on Bond Graph Modeling And Simulation; 2007

Society for Modeling and Simulation International (SCS)

This paper applies the model-based ARR technique, implemented on the so-called Diagnostic Bond Graph, to the problem of detecting and isolating faults in vehicle suspensions. A fourteen degrees of freedom (DoF), four-wheeled vehicle Bond Graph model adapted from models available in the literature is used as starting point. The main contribution of the paper is the proposition of a simplified Diagnostic Bond Graph that, on the ground of the chosen measurements, allows solving the FDI problem on a reduced subsystem decoupled from the wheel dynamics. This renders unnecessary using the complex and uncertain ground-tire interaction model. The simulation results presented illustrate the method ability of monitoring and isolating all the possible suspension faults considered.