Read e-book online Adaptive Control of Chemical Processes 1985 PDF

By International Federation of Automatic Control, Heinz Unbehauen

ISBN-10: 0080334318

ISBN-13: 9780080334318

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The necessary specifications for MIMOSC include selection of the structure of the discrete time model, selection of measurements, control inputs, and a statement of the control objective. These specifications are inferred from basic chemical engineering knowledge of the process and from open loop responses. The parameters of the selected model structure are estimated on line and used to calculate the control gains. Experimental results demonstrate that MIMOCS accomplishes satisfactory and robust control of the highly sensitive recycle reactor.

The proposed model structure is as follows: y(k)=Al y(k-l)+A2 y(k-2)+A3 y(k-3)+A4 y(k-4)+ Bl u(k-l)+I e(k)+Cl e(k-l) where Al = A3 0 0 0 0 0X0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X X 0 X X X X X X 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 X X X A2 = X X 0 0 0 0 0 0 0 X 0 0 0 0 0X0 0 0 0 0 0 0 0 0 X 0 0 0 A4 = X 0 0 0 0 0 0 0 0 0 0 0 X 0 0 0 X 0 0 0 X 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 X 0 0 0 0 0 Cl 0 X 0 0 0 0 0 X 0 0 0 0 0 X 0 0 0 0 0 0 Bl = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 X X X X X The first element in matrix Bl explains how a change in the controlled temperature affects the inlet temperature, that is how a change in the control signal is acknowledged or recognized as a change in the corresponding measurement after one sampling interval.

Diss. 2 -0,2 -0,1 Membership functions for the naphta mixture olass 1 38 B. Böhme and D. 5 5 Mr Mz M¥ I 0,6 0,6 0,1 Pig. 6 0,6 0,9 1,0 Selected membership functions of several classes for the feature 5 (mean boiling temperature) 10 20 30 ¥0 50 Operation Pig. 4 0,7 60 time 70 60 [days] Optimal control for the naphta mixture class 1 Copyright © IF AC Adaptive Control of Chemical Processes, Frankfurt am Main, 1985 AN APPROACH FOR ADAPTIVE-PREDICTIVE CONTROL P. D. Pavlechko*, M. C. Wellons** and T.

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Adaptive Control of Chemical Processes 1985 by International Federation of Automatic Control, Heinz Unbehauen


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