Home Chemical • Download Advanced control of chemical processes (ADCHEM '94) : IFAC by D Bonvin; International Federation of Automatic Control PDF

Download Advanced control of chemical processes (ADCHEM '94) : IFAC by D Bonvin; International Federation of Automatic Control PDF

By D Bonvin; International Federation of Automatic Control

This booklet brings jointly the most recent examine findings within the key zone of chemical method regulate; together with dynamic modelling and simulation - modelling and version validation for program in linear and nonlinear model-based regulate: nonlinear model-based predictive keep watch over and optimization - to facilitate restricted real-time optimization of chemical tactics; statistical keep an eye on techniques - significant advancements within the statistical interpretation of measured information to steer destiny examine; knowledge-based v model-based control - the mixing of theoretical facets of regulate and optimization idea with more moderen advancements in synthetic intelligence and computing device technology.

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Extra info for Advanced control of chemical processes (ADCHEM '94) : IFAC symposium, Kyoto, Japan, 25-27 May 1994

Example text

OU[ Flow out, kmol/h T of outlet stream, "K Aduator Disturbance Measurements - ... type Variable Dllllllmt cm.. 1111 2 Aduator Disturbance ...... Measurements & 1- Figure 4 : Process flowsheet for MTBE production. Components are : i-butene( l), methanol(2), MTBE(3) butene(4). At the reference steady state, the model linearization feature was employed and the linear process model was obtained which was then employed for linear controllabilty analysis. : (the controllabilty matrix, which is a function of the A, and B matrices), are presented in Table 3.

Based on the assumptions stated below, the model is c:omposed of material balance and heat balance as the basic system. :1x .. -�Rij· (5) The heat balance of the heat exchanger is given by (Processing area) 1) The model centers on the multistage reactor, and includes the range from reactor entry to reactol' exit The model for the cooling medium system is considered to be from the cooling medium supply line. 2) The mass flow of the melt and cooling medium are invariable. 3) The interior of the stirred tank reactor is con­ sideircd to be a model of continuous stirred tank reaciors, and the thermal capacity of the agita­ tor and shaft are ignored.

8. with a fixed /3 gives yet another distinctive indi­ F I G U RES cation of model mismatch . The ratio exhibits one singul arity and a single zero crossing for b ot h the three-tank system and F O P DT model. The lo­ cations of the singularities and zero crossings are easy to detect even with noise , but are different for the two cases. In this pap e r , it is shown that the P WT c an play an important role in defining proper model structure. In the three-tank system problem, the differences discussed above ought to disappear as the model form approaches the structure of the system .

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