Implementation of an Innovative Simplified Sliding Mode Observer-Based Robust Fault Detection in a Drum Boiler System

Authors: L. Khoshnevisan, H. R. Momeni, A. Ashraf-Modarres

Abstract:

One of the robust fault detection filter (RFDF) designing method is based on sliding-mode theory. The main purpose of our study is to introduce an innovative simplified reference residual model generator to formulate the RFDF as a sliding-mode observer without any manipulation package or transformation matrix, through which the generated residual signals can be evaluated. So the proposed design is more explicit and requires less design parameters in comparison with approaches requiring changing coordinates. To the best author's knowledge, this is the first time that the sliding mode technique is applied to detect actuator and sensor faults in a real boiler. The designing procedure is proposed in a drum boiler in Synvendska Kraft AB Plant in Malmo, Sweden as a multivariable and strongly coupled system. It is demonstrated that both sensor and actuator faults can robustly be detected. Also sensor faults can be diagnosed and isolated through this method.

Keywords: Boiler, fault detection, robustness, simplified sliding-mode observer.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1078743

References:

[1] A. Ashraf-Modarres, M.R. Jahed-Motlagh, "Improving Boiler Efficiency through Software Methods in Thermal Power Plants", in Proc. 17th International Power System Conf, Tehran-Iran, 2002.
[2] A.-J Chen and B.-P.-R. Patton, Robust model-based fault diagnosis for dynamic systems. Kluwer Academic Publishers, USA: MA, 1999, pp. 1- 14.
[3] P. Q. Ha, "Dynamic output feedback sliding-mode control using pole placement and linear functional observers", IEEE Trans. Industrial Electronics, Vol. 50, No. 5, pp. 1030-1037, Oct, 2003.
[4] B. L. Walcott, and S. H. Zak, "State observation of nonlinear uncertain dynamic systems", IEEE Trans. Automatic Control, Vol. 32, No. 2, pp. 166-170, , 1987.
[5] B. Walcott and S. H. Zak, "Combined observer controller synthesis for uncertain dynamical systems with applications" , IEEE Trans on Systems, Man and Cybernetics, Vol. 18, No. 1, pp. 88-104, Aug,1988.
[6] M. Darouach, M. Zasadzinski, and S. J. Xu, "Full-order observers for linear systems with unknown inputs", IEEE Trans on Automatic Control, Vol. 39, No. 3, pp. 606-609, Aug, 2002.
[7] W. Chen and M. Saif, "Unknown input observer design for a class of nonlinear systems: and LMI approach", in 2006 Proc. AERICAN CONTROL Conf, USA, pp. 834-838.
[8] S. Hui and S. H. Zak, "Low-order unknown input observers", in 2005 Proc. AERICAN CONTROL Conf, USA, pp. 4192-4197.
[9] S. Hui and S. H. Zak, "Observer design for systems with unknown input", International Journal of Applied Mathematics and Computer Science, Vol.15, No. 4, pp. 431-446,Dec, 2005.
[10] H. H. Choi, K. S. Ro, "LMI based sliding-mode observer design method", IEE Proc, Control Theory and Applications, vol. 152, No. 1, pp. 113-115, Feb, 2005.
[11] C. P. Tan and C. Edwards, "An LMI approach for designing sliding mode observers", in 2000 Proc. 39th IEEE Int. Conf. Decision and Control, Australia, pp. 2587-2592.
[12] C. Edwards, S. K. Spurgeon, and R. J. Patton, "Sliding mode observers for fault detection and isolation", Elsevier, Automatica, Vol. 36, No. 4, pp. 541-553, Apr 2000.
[13] S. Dhahri, F. Ben Hamida, A. Sellami, M. Gossa, "LMI-based Sliding- Mode Observer Design Method for Reconstruction of Actuator and Sensor Faults", Springer, Int. Journal on Sciences and Technologies of Automatic Control, Vol. 1, No. 1, p.p. 91-107, Jun 2007.
[14] Jean-Jacques E. Slotine, Weiping Li, Applied Nonlinear Control, Prentice-Hall, New Jersey: Eglewood Cliffs, 1991, p.p 276-306.
[15] A. K J Astrom and B. R D Bell, "Drum Boiler Dynamics", Elsevier, Automatica, Vol. 36, No. 3, pp. 363-378, Mar 2000.
[16] A. F.Khani and B. A.Yazdizadeh, "Boiler -Turbine Unit Controller Design Based on the Extended State Observer", in Proc. IEEE Int. Conf. on Control and Automation, New Zealand, 2009, pp. 2066-2071.
[17] A. Arun K. Samantaray and B. Belkacem Ould Bouamama, Model-based Process Supervision: A Bond Graph Approach, Springer, London, 2008, p.p. 265-266.