This paper deals with the reliability and performance evaluation of two methods for FDI of on-board sensors and thrusters for attitude control of the Mars Express (MEX) orbiter spacecraft. The study makes use of a detailed non- linear simulation of the MEX, and the FDI performance is evaluated subject to disturbance signals, model uncertainty and measurement noise processes. The two methods are based on robust dynamic observers or filters, used as estimators, which generate the FDI residual signals. When organised into an estimator bank excellent fault isolation properties are achieved upon suitable design. Carefully selected performance criteria indices are used together with Monte Carlo robustness tuning and performance evaluation. These constitute the FDI design methodology, realising a reliability approach for real application of FDI in future spacecraft.
A MONTE CARLO ANALYSIS AND DESIGN FOR FDI OF A SATELLITE ATTITUDE CONTROL SYSTEM
SIMANI, Silvio;
2006
Abstract
This paper deals with the reliability and performance evaluation of two methods for FDI of on-board sensors and thrusters for attitude control of the Mars Express (MEX) orbiter spacecraft. The study makes use of a detailed non- linear simulation of the MEX, and the FDI performance is evaluated subject to disturbance signals, model uncertainty and measurement noise processes. The two methods are based on robust dynamic observers or filters, used as estimators, which generate the FDI residual signals. When organised into an estimator bank excellent fault isolation properties are achieved upon suitable design. Carefully selected performance criteria indices are used together with Monte Carlo robustness tuning and performance evaluation. These constitute the FDI design methodology, realising a reliability approach for real application of FDI in future spacecraft.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
