mesa lab ifac’14 paper review (on selected two papers) zhuo li mesa lab mesa (mechatronics,...

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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