A New Decoupling Controller for Multi-Time Delayed TITO Processes
Main Article Content
Abstract
Multiple-input-multiple-output systems (MIMO) are very popular in the industry, such as distillation column plant, liquid dispensers, infant incubators, quadruple tank... One of the difficulties to handle them is how to eliminate interactions between variables. The decoupling control is a research field related to solving this problem, which has been studied by many authors in the past. This paper addresses to propose a new decoupling control method applied for two input two output processes (TITO) with multi-time delays. Simulation results show that the performance of the system is improved in the sense, that no longer interfering between the loops is occurred as well as the process output disturbances had been completely eliminated.
Keywords
MIMO, TITO, Decoupling control, Plant with multi-time delays
Article Details
References
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[3] N. F. Jerome and W.H. Ray. High-Performance Multivariable Control Strategies for Systems Having Time Delays. AIChE Journal, Vol 32 N 6 (1986) 914-931.
[4] O.J.M. Smith. Closer control of loops with dead time. Chemical Engineering Progress 53 217-219, 1957.
[5] T.Hagglund. A Predictive PI Controller for Processes with Long Dead Times. IEEE Control Systems Mag., Vol 12 N 1 (1993) 57-60.
[6] P.Albertos and P.Garcya, Robust control design for long time-delay systems, Journal of Process Control, 19, (2009) 1640-1648.
[7] P.Albertos and A. Sala., Multivariable Control Systems: An Engineering Approach. Springer, 2002.
[8] Q.G. Wang, Y. Zhang, M.-S. Chiu, Decoupling internal model control for multivariable systems with multiple time delays, Chemical Engineering Science 57 (2002) 115–124.
[9] Q.G. Wang, Y. Zhang, M.-S. Chiu, None-interacting control design for multivariable industrial processes, Journal of Process Control 13 (3) (2003) 253-265.
[10] Q.G. Wang, Y. Yang, Transfer function matrix approach to decoupling problem with stability. Systems & Control Letters 47 (2002) 103–110.
[11] Q.G. Wang, B. Huang, X. Gu, Auto-tuning of TITO decoupling controllers from step tests, ISA Transactions 39 (2000) 407–418.
[12] P.Nordfeld and T. Hagglund Decoupler and PID controller design of TITO systems. Journal of Process Control 16 (2006) 923-936.
[13] P.Nordfeldt, PID control of TITO systems. Licentiate thesis ISRN LUTFD2/TFRT-3238-SE, Department of Automatic Control, Lund Institute of Technology, Sweden, December 2005.
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