Download e-book for iPad: Advanced Control of Industrial Processes: Structures and by Piotr Tatjewski

By Piotr Tatjewski

This ebook provides the techniques and algorithms of complicated business strategy keep an eye on and online optimization in the framework of a multilayer constitution. It describes the interplay of 3 separate layers of strategy regulate: direct keep an eye on, set-point keep an eye on, and monetary optimization. The publication good points illustrations of the methodologies and algorithms by way of labored examples and by means of result of simulations in accordance with business approach types.

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Additional resources for Advanced Control of Industrial Processes: Structures and Algorithms (Advances in Industrial Control)

Example text

3 in the previous section presents the control structure of this type, where forcing the equality constraint on a sub-vector y d of the vector y of the process outputs, y d (t) = yrd is implemented by application of a constraint controller. Let us observe that in this case the necessary information sent from the optimization unit to the subordinate controllers are optimal values of the set-points cf and yrd , although all elements of the vector c = (cf , cd ) are decision variables of the constrained optimization problem.

1 rate FA [kg/min] and a temperature TA [K]. Two reactions take place in the 1 1 ] and rC [ min ], respectively. The tank: A → B → C with reaction rates rB [ min first reaction is endothermic and the second one is exothermic. The mixture is heated by a heating medium flowing through a pipe heat exchanger located in the bottom part of the reactor. The flow rate of the heating medium Fh and the product outflow rate from the reactor F can be controlled by appropriate valves. The following simplifying assumptions are taken when modeling the process: 1.

The influence of the shaft work and the heat exchange with the environkg ment are negligible. Moreover, the same mass densities ρ [ m 3 ] and heat capacities cw [ KJkg ] of all mixture components and of the mixture itself are assumed – to simplify the process modeling. 4. The mean temperature Thm of the heating medium at the input and at the output of the heat exchanger pipe is taken as a driving force of the heat exchange. 10) where a and b are coefficients resulting from the construction of the heat exchanger [85].

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