2008 Annual Meeting
(687g) Safe Parking of Batch Processes
Existing fault handling techniques, and the safe-parking framework of [1], however, are not directly applicable to batch processes due to the fact that the desired process objective, that of producing the required product, is inherently not that of stabilization around an equilibrium point. Motivated by this consideration, this work considers the problem of developing safe-parking framework for batch processes. The key idea is to utilize available control action following a fault to maintain system conditions such that the desired end point can finally be reached upon fault rectification. The ideas are demonstrated through a CSTR example operated in batch mode with 2 inputs and a fed-batch bioreactor system with 1 input.
References
[1] Mhaskar, P., A. Gani, N. H. El-Farra, C. McFall, P. D. Christofides and J. F. Davis, "Integrated Fault Detection and Fault-Tolerant Control of Nonlinear Process Systems,'' AIChE J., 52, 2129-2148, 2006.
[2] P. Mhaskar, ``Robust Model Predictive Control Design for Fault-Tolerant Control of Process Systems,'' Ind. Eng. & Che. Res., 45, 8565-8574, 2006.
[3] Mhaskar, P., C. McFall, A. Gani, P. D. Christofides and J. F. Davis, "Isolation and Handling of Actuator Faults in Nonlinear Systems,'' Automatica, 44, 53-62, 2008.
[4] Mhaskar, P. AND Gandhi, R. (2008). Safe-parking of Nonlinear Process Systems. Computers and Chemical Engineering, 32, in press.