Gain Scheduled Multivariable Control of a Continuous Stirred Tank Reactor
N. Kamala1, J. Venkatesh Balaji2
1N. Kamala, Department of Robotics and Automation, Jain Deemed-to-be University, Bangalore (Karnataka), India.
2J. Venkatesh Balaji, Department of Mechanical Engineering, MNM Jain Engineering College, Chennai (Tamil Nadu), India.
Manuscript received on 14 December 2019 | Revised Manuscript received on 22 December 2019 | Manuscript Published on 31 December 2019 | PP: 95-100 | Volume-9 Issue-1S3 December 2019 | Retrieval Number: A10191291S319/19©BEIESP | DOI: 10.35940/ijeat.A1019.1291S319
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Most chemical reactors, representing Multi-Input Multi-Output (MIMO) systems, are highly nonlinear and require complex control than single-input single-output (SISO) systems. In the present work, the system is linearized around different operating points. As linear design strategies are intended to work in linear regions, they are employed to evaluate local controller parameters. Decentralized controllers using constant detuning factor and decoupling controllers using static decouplers are designed. A gain scheduler is developed to deal with changes in operating conditions. The performances are evaluated by simulating the nonlinear equations of the system. Decentralized controllers cannot mitigate the interactions due to its structure possessing single loop. It is exhibited that the decoupling controllers offer better control for tracking of desired set point and rejection of load disturbances than those of decentralized controllers. The superiority of the suggested controller has been portrayed by performing simulation study on a Continuous Stirred Tank Reactor (CSTR).
Keywords: CSTR, Decoupling Control, Decentralized Control, Integral Absolute Error (IAE), Integral Square Error (ISE), Gain Schedule.
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