Bond Graph Model Based For Robust Fault Diagnosis

This paper deals with residuals and thresholds generation in presence of parameter uncertainties, using only one bond graph representation in linear fractional transformation form (LFT), applied for mechatronic system. The residuals sensitivity analysis based on the fault detectability indexes, with Interval and Statistical methods are used for their evaluation. The presented methodology is applied on electromechanical test bench in order to detect a backlash phenomenon. Experimental tests show the influence of the dead zone magnitude and system parameters variations on the residuals.