Aerodynamic Decoupled FDI for Frequency Faults in Earth Satellite Engines
| Autor: | P. Baldi, Paolo Castaldi, Nicola Mimmo, Silvio Simani |
|---|---|
| Přispěvatelé: | P. Baldi, P. Castaldi, N. Mimmo, S. Simani |
| Rok vydání: | 2012 |
| Předmět: |
FLIGHT CONTROL
Engineering business.industry Frequency signal analysis Satellite attitude control FAULT DETECTION Control engineering General Medicine Decoupling (cosmology) Aerodynamics Fault (power engineering) Reaction wheel Fault detection and isolation Nonlinear system Geometric approaches Robustness (computer science) Control theory ROBUST FDI DISTURBANCE DECOUPLING Sensitivity (control systems) Disturbance decoupling NON LINEAR GEOMETRIC APPROACH business FDI FOR NONLINEAR SYSTEMS |
| Zdroj: | IFAC Proceedings Volumes. 45:1095-1100 |
| ISSN: | 1474-6670 |
| DOI: | 10.3182/20120829-3-mx-2028.00178 |
| Popis: | This paper presents new results regarding the development of a fault detection and isolation scheme for a nonlinear satellite model. The main issue concerns the handling of frequency faults affecting the reaction wheels of a spacecraft attitude control system, i.e. how to detect and isolate faults, and lastly how to determine the different frequencies characterising these faults through spectral analysis. As the study focusses on a general satellite nonlinear model, where aerodynamic and gravitational disturbances, as well as measurement errors are present, the robustness of the suggested strategy is achieved by exploiting an explicit disturbance decoupling method via a nonlinear geometric approach. In order to achieve accurate fault diagnosis, aerodynamic disturbance decoupling represents a key point, since the aerodynamic model is often uncertain. Moreover, an improvement of the nonlinear geometric approach is presented, in order to realise an aerodynamic decoupled fault diagnosis with normalized fault sensitivity. To the best authors? knowledge, this is the first works presenting a methodology for frequency fault diagnosis which is based on the nonlinear geometric approach for the fault and disturbance decoupling. The obtained results demonstrate that the proposed methodology can achieve better performances with respect to traditional fault detection and isolation schemes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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