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Loop-shaping controller design from input-output data: application to a paper machine simulator

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4 Author(s)
Tsakalis, K. ; Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA ; Dash, S. ; Green, A. ; MacArthur, W.

The main motivation for this work was the need for a systematic design of high-performance controllers for paper machines. An integrated identification and controller design approach, based on loop-shaping principles, is presented. Starting with time-domain input-output data, a coprime factorization of the plant is identified using linear least-squares techniques. The residual error from the identification is then used to obtain estimates of the coprime factor uncertainty that are translated to sensitivity and complementary sensitivity bounds for the closed-loop system. These bounds serve as a guide for the selection of a target loop and the controller is designed using H-infinity tools. The application of this approach is demonstrated on Honeywell's high-fidelity simulator. The simulations demonstrate the suitability of the approach and illustrate that the technique can be used to reliably provide high performance for both servo and regulatory control

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Control Systems Technology, IEEE Transactions on  (Volume:10 ,  Issue: 1 )