New PDF release: Advanced control of chemical processes (ADCHEM '94) : IFAC

By D Bonvin; International Federation of Automatic Control

ISBN-10: 0080422292

ISBN-13: 9780080422299

This book brings jointly the most recent learn findings within the key quarter of chemical procedure 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 an eye on and optimization - to facilitate limited real-time optimization of chemical techniques; statistical regulate techniques - significant advancements within the statistical interpretation of measured information to lead destiny examine; knowledge-based v model-based control - the combination of theoretical features of keep an eye on and optimization concept with more moderen advancements in synthetic intelligence and desktop technological know-how.

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

Sample text

The PWT then has a single tem and the best least-squares fitted model are Hence, the ratio of PWTs has similar in the time domain, careful analysis in the ratio of W i /W 2 for a unit step response of the One can observe these differences by analyzing zero crossing in r. one zero and one singularity. Figure 8 shows the transform domain reveals remarkable differences. FOPDT model and the three-tank system. The the ratio of the PWT for consecutive values of n . zero crossings and singularities are clear with and Comparing the ratio of the step responses for the the positions of the singularities and zeros are dif­ clearly that the FOPDT model is inconsistent.

Sci. Comput. ( 1969 ) . "Digital Piovoso , M . J . 40 2 : Fi ts to a unit step response of the three-tank system. Solid line = three-tank sys­ tem, Jong dashed line = graphical fit, short dashed line = time domain least-squares fit, dash dot line = P WT domain least-squares fit. D. th esis, Department of Electrical Engineering, University of Delaware, Newark, DE. Seborg , D . E . , T . F . Edgar and D . A . Mellichamp ( 1 98 9 ) . ·. , . 5 .... :< "" 0. � I I I I I 10 20 30 15 20 1: 40 Time Figure 6 : ( W1 /W2) vs T at f3 = 1 0.

This produces additional redundancy beyond For the three-tank that normally found with other wavelet trans­ system this ratio is also approximately linear . forms . The wavelet transform is derived fr om the for small values of /3 but clearly diverges for large nel . The Poisson transform , itself, has many in­ This matches the results of the FOPDT model backward difference of the Poisson transform ker­ values of /3. This mismatch is an indication that teresting properties such as convolution preserv­ describe the three-tank system.

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Advanced control of chemical processes (ADCHEM '94) : IFAC symposium, Kyoto, Japan, 25-27 May 1994 by D Bonvin; International Federation of Automatic Control

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