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Student Number 82321036
Author Lee Kuo(괼)
Author's Email Address No Public.
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Department Chemical and Materials Engineering
Year 1994
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title High-Purity Distillation Columns Simulation and Control: Empirical Low-Order Nonlinear Model Development
Date of Defense
Page Count 65
Keyword
  • Modeling;Distillation control
  • Abstract Due to nonlinearity, loop interaction and ill conditioning of
    high-purity distillation columns, it is difficult to describe
    dynamic behavior of such columns using simple linear
    mathmatical models. Also for most industrial column,
    composition are rarely available on-line. Control is therefore
    often based on temperature measurements. Chien(1994) have
    proposed a model form for temperature-based control system.
    The model form is:n(y)*dy/dt=-y+k(y)*u The nonlinear functions
    of n and k are very simple forms which depend on operating
    conditions and top and bottom temperatures. The parameters in
    this model form are identified by optimizations method using
    various input/output data. The model's prediction ability is
    also compared to other nonlinear dynamic models such as
    logarithmic temperature transformations and nonlinear ARX
    model, and is validated using several input sequences. The
    results show the model derived from optimization method is the
    best in capturing process dynamic behavior. This model can be
    used in a model-based control framework to improve the control
    performace.
    Table of Content
    Reference
    Advisor
  • Yu Shu Wei;Chien I Lung(_;q)
  • Files No Any Full Text File.
    Date of Submission

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