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Population balance modelling and H∞-controller design for a crystallization process

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Vollmer,  U.
Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;

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Raisch,  J.
Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;
Otto-von-Guericke-Universität Magdeburg, External Organizations;

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Citation

Vollmer, U., & Raisch, J. (2002). Population balance modelling and H∞-controller design for a crystallization process. Chemical Engineering Science, 57(20), 4401-4414. doi:10.1016/S0009-2509(02)00354-8.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-A06D-F
Abstract
In this paper we consider the robustly stabilizing control of a 10001 draft tube baffled crystallizer. When operated at high fines dissolution rates, the crystallizer exhibits sustained oscillations. A detailed population balance model for the process can be found in the literature. Based on this detailed model we develop a simpler population balance model. This, in turn, permits the derivation of an irrational transfer function from manipulated to measured variable. An H-infinity mixed sensitivity minimization problem is formulated and solved using an infinite-dimensional version of H-infinity theory. Two different controllers are designed and compared in simulation studies. © 2002 Elsevier Science Ltd. All rights reserved. [accessed 2014 April 1st]