MESA LAB

IFAC’14 Paper Review(On selected two papers)

Zhuo LiMESA (Mechatronics, Embedded Systems and Automation)LAB

School of Engineering,University of California, Merced

E: zli32@ucmerced.eduLab: CAS Eng 820 (T: 209-228-4398)

Sep 28, 2014. Monday 4:00-6:00 PMApplied Fractional Calculus Workshop Series @ MESA Lab @ UCMerced

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Sessions inline with my research focus

• Industrial Applications of Process Control

• Process Control Applications

• Nonlinear Predictive Control

• Model Predictive Control in Chemical Processes

• Model Predictive Control for Embedded Systems

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AFC Workshop Series @ MESALAB @ UCMerced04/21/2014

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Review candidate• An Industrial Model Based Disturbance Feedback Control Scheme• Feed-forward-feed-back control of an industrial multicomponent distillation column• Fixed-Point Implementation of a Proximal Newton Method for Embedded Model

Predictive Control• Robust Vertical Plasma Stabilization of the future tungsten divertor configuration of Tore

Supra• Optimal DOB Design for Balancing Input / Output Disturbances Response

– Prof.Weidong Zhang

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Paper I

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Paper I

• Tray temperature measurements is addressed• model-based nonlinear state-feedback robust control problem is addressed• An output feedback PI temperature controller with dynamic feed-forward set-

point compensation and anti-windup protection

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Problem description• The n-dimensional open-loop dynamical column system (Luyben, 1990; Baratti et al.,

1998)

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Further breakdowns

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The controller design

• FF – feed-forward controller

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The controller design

• OF – output feedback

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The controller design

• Combine them together

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Simulation testing

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Conclusion • Improved the performance of the industrial multicomponent distillation column

by upgrading OF temperature control • The upgrade includes:

– retuning the existing control loop and realizing it in IMC form with anti-windup protection– adding a nearly-linear single-load dynamic temperature set-point compensator which amounts to

a PI loop– accompanying the design with conventional-like tuning guidelines underlain by a robust

stability criterion drawn from advanced control theory– enabling a gradual transition from the old to the new control scheme.

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Paper 2

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Problem description

• The closed loop transfer function

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The stability condition

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• Consider:

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Numerical example 1

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Numerical example 1

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Numerical example 2

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Numerical example 2

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Conclusion

• Proposed a new control strategy that uses disturbance feedback control with PID controllers.

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