Abstract
Geometric nonlinear control methods are applied to a CO 2 absorption/desorption process. A controller based on a nonlinear dynamic model of the process is unacceptably large. Graph theory is used in conjunction with a singular perturbations analysis to reduce the model order, and correspondingly the controller size. An open-loop observer is used to predict the state information and to obtain an acceptable regulatory response. Experimental results for servo and regulatory tests are given, demonstrating the controller's ability to operate on an industrial-scale pilot plant.
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