Abstract
A broadly-applicable, control-relevant system identification methodology for nonlinear restricted complexity models (RCMs) is presented. Control design based on RCMs often leads to controllers which are easy to interpret and implement in real-time. A control-relevant identification method is developed to minimize the degradation in closed-loop performance as a result of RCM approximation error. A two-stage identification procedure is presented. First, a nonlinear ARX model is estimated from plant data using an orthogonal least squares algorithm; a Volterra series model is then generated from the nonlinear ARX model. In the second stage, a RCM with the desired structure is estimated from the Volterra series model through a model reduction algorithm that takes into account closed-loop performance requirements. The effectiveness of the proposed method is illustrated using two chemical reactor examples.
Original language | English (US) |
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Pages (from-to) | 209-222 |
Number of pages | 14 |
Journal | Journal of Process Control |
Volume | 11 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2001 |
Keywords
- Control relevant modeling
- Nonlinear systems
- Reduced order models
- System identification
- Volterra series
ASJC Scopus subject areas
- Control and Systems Engineering
- Modeling and Simulation
- Computer Science Applications
- Industrial and Manufacturing Engineering