Fault and unknown input reconstruction in VTOL aircraft system using sliding mode observer

This article presents a new approach to estimation of unknown inputs and faults in a class of nonlinear systems. The approach is based on the design of a cascade connection of two sliding mode observers. The first is used for estimation of state and unknown inputs and the second is used for fault detection. An important feature of the proposed approach is that the state trajectories do not leave the sliding manifold even in presence of unknown disturbances and faults. This allows for faults and disturbances to be reconstructed based on information retrieved from the equivalent output injection signal. The proposed approach is used to reconstruct unknown disturbances and faults in nonlinear model of Vertical Take-Off and Landing (VTOL) aircraft system.

[1]  A. Willsky,et al.  Failure detection and identification , 1989 .

[2]  S. Drakunov.  Sliding-mode observers based on equivalent control method , 1992, [1992] Proceedings of the 31st IEEE Conference on Decision and Control.

[3]  A. J. Koshkouei,et al.  Sliding mode state observation for non-linear systems , 2004 .

[4]  Benito R. Fernandez,et al.  Robust fault detection in nonlinear systems using sliding mode observers , 1993, Proceedings of IEEE International Conference on Control and Applications.

[5]  D. Koenig,et al.  Design of a class of reduced order unknown inputs nonlinear observer for fault diagnosis , 2001, Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148).

[6]  Jean-Pierre Barbot,et al.  Sliding Mode Control In Engineering , 2002 .

[7]  Lorenzo Marconi,et al.  Autonomous vertical landing on an oscillating platform: an internal-model based approach , 2002, Autom..

[8]  A. Isidori.  Nonlinear Control Systems , 1985 .

[9]  Harry G. Kwatny,et al.  Nonlinear Control and Analytical Mechanics: A Computational Approach , 2000 .

[10]  Richard Vernon Beard,et al.  Failure accomodation in linear systems through self-reorganization. , 1971 .

[11]  Yi Xiong,et al.  Sliding mode observer for nonlinear uncertain systems , 2001, IEEE Trans. Autom. Control..

[12]  A. Isidori,et al.  Nonlinear actuator fault detection and isolation for a VTOL aircraft , 2001, Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148).

[13]  J.J. Gertler,et al.  Survey of model-based failure detection and isolation in complex plants , 1988, IEEE Control Systems Magazine.

[14]  P. Frank,et al.  Survey of robust residual generation and evaluation methods in observer-based fault detection systems , 1997 .