Component failure estimation with Unknown Input Observer: A physical approach

In the literature Unknown Input Observers for sensor and actuator failure estimation are widely developed. None of them concerns component fault estimation. These analytical approaches are based on state equation description and complex numerical calculation. The present paper deals with physical component failure estimation based on bond graph approach as power full methodology for dynamic modeling of multi-physical systems. The additional energy due to the component failure (clearly displayed in the model) is considered as unknown input. Furthermore, properties of this observer are based on the finite and infinite structures and are synthesized directly from the graphical model, which can be pointed out from physical, structural and causal properties of used graphical representation. The developed methodology is validated in real experimental hydraulic process allowing valve and tank leakage failure estimation.

[1]  R. Guidorzi,et al.  On Wonham stabilizability condition in the synthesis of observers for unknown-input systems , 1971 .

[2]  G. Basile,et al.  A new characterization of some structural properties of linear systems: unknown-input observability, invertibility and functional controllability† , 1973 .

[3]  R. W. Wilde,et al.  Observers for linear systems with unknown inputs , 1988 .

[4]  Alan S. Perelson,et al.  System Dynamics: A Unified Approach , 1976, IEEE Transactions on Systems, Man, and Cybernetics.

[5]  M. Fliess,et al.  Une approche intrinsèque des observateurs linéaires à entrées inconnues , 2006 .

[6]  M. Hou,et al.  Design of observers for linear systems with unknown inputs , 1992 .

[7]  R. Mukundan,et al.  On designing reduced-order observers for linear time-invariant systems subject to unknown inputs , 1982 .

[8]  S. Bhattacharyya.  Observer design for linear systems with unknown inputs , 1978 .

[9]  Mohamed Darouach.  Complements to full order observer design for linear systems with unknown inputs , 2009, Appl. Math. Lett..

[10]  Dean Karnopp,et al.  Introduction to physical system dynamics , 1983 .

[11]  M. Darouach,et al.  Full-order observers for linear systems with unknown inputs , 1994, IEEE Trans. Autom. Control..

[12]  C. Sueur,et al.  Bond-graph approach for structural analysis of MIMO linear systems , 1991 .

[13]  Belkacem Ould Bouamama,et al.  State and unknown input observer: analysis and design , 2013 .

[14]  B. Ould Bouamama,et al.  Bond graph UIO approach for fault components monitoring , 2013, 2013 Conference on Control and Fault-Tolerant Systems (SysTol).