Interactive Multiple Model Approach to Actuator Fault Detection, Estimation and Reconfiguration of a Satellite Launch Vehicle

Fault diagnosis is important in safety critical systems like Satellite launch vehicles (SLVs), Actuator stuck failures are a major concern in all space vehicles. The Interactive Multiple Model (IMM) is used to detect and identify various actuator stuck failures in a SLV. The fault is estimated with a Maximum likelihood Estimator (MLE). The identification and estimation of the fault, is followed by a reconfiguration of the system allowing to accommodate the fault without any impact in the system response.