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  • 1
    Digitale Medien
    Digitale Medien
    Application of Interior-Point Methods to Model Predictive Control (1998)
    Springer
    Journal of optimization theory and applications 99 (1998), S. 723-757 
    Details
    ISSN: 1573-2878
    Schlagwort(e): Model predictive control ; interior-point methods ; Riccati equation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract We present a structured interior-point method for the efficient solution of the optimal control problem in model predictive control. The cost of this approach is linear in the horizon length, compared with cubic growth for a naive approach. We use a discrete-time Riccati recursion to solve the linear equations efficiently at each iteration of the interior-point method, and show that this recursion is numerically stable. We demonstrate the effectiveness of the approach by applying it to three process control problems.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1021711402723
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  • 2
    Digitale Medien
    Digitale Medien
    Emulsion polymerization reactor stability: Simplified model analysis (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 1663-1677 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: A class of simplified emulsion polymerization models is developed. These models include the distribution of particle sizes and radical numbers, and the coupling of the particle initiation rate to the particle size distribution. An analytical solution to the modeling equations is found from contraction mapping. In addition, necessary and sufficient conditions for local stability are derived. These result in a simple criterion for the onset of oscillations in terms of kinetic rate constants and reactor operating conditions. The results clearly show that radical desorption, chain transfer agents, and certain types of impurities should have a strong influence on reactor stability.
    Zusätzliches Material: 21 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690331010
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  • 3
    Digitale Medien
    Digitale Medien
    The modeling of batch and continuous emulsion polymerization reactors. Part I: Model formulation and sensitivity to parameters (1988)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 28 (1988), S. 237-256 
    Details
    ISSN: 0032-3888
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: A detailed model for the prediction of the behavior of batch or continuous emulsion polymerization reactors has been formulated, and an efficient numerical scheme for simulation developed. The model makes use of population balance equations and detailed mechanisms for chemical and physical rate processes. The numerical procedure chosen for its solution is orthogonal collocation on finite elements. In this paper, a few comparisons with experimental data are presented to demonstrate the model validity. Finally, a parametric sensitivity study is carried out to identify the most important kinetic and physical parameters. In the sequel, a comprehensive comparison of model predictions with a wide variety of experimental data will be presented.
    Zusätzliches Material: 16 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pen.760280502
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  • 4
    Digitale Medien
    Digitale Medien
    The modeling of batch and continuous emulsion polymerization reactors. Part II: Comparison with experimental data from continuous stirred tank reactors (1988)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 28 (1988), S. 257-274 
    Details
    ISSN: 0032-3888
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: A detailed model for emulsion polymerization is compared with extensive data from continuous stirred tank reactors. Model predictions are compared with both steady-state and dynamic data, for polymerization of styrene, methyl methacrylate, and vinyl acetate. Good agreement between model and experiment is achieved with one set of parameters and without any data fitting. The results show that the model is capable of predicting all of the experimentally observed phenomena including steady-state multiplicity, sustained oscillations, ignition and extinction dynamics, and overshoot during start-up.
    Zusätzliches Material: 47 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pen.760280503
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