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IFAC’14 Paper Review (On selected two papers)

This paper reviews two industrial model-based control schemes for process optimization, including disturbance feedback control and output feedback control. The performance improvement and implementation details are discussed.

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IFAC’14 Paper Review (On selected two papers)

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  1. IFAC’14 Paper Review(On selected two papers) Zhuo Li MESA (Mechatronics, Embedded Systems and Automation)Lab School of Engineering, University of California, Merced E: zli32@ucmerced.edu Lab: CAS Eng 820 (T: 209-228-4398) Sep 28, 2014. Monday 4:00-6:00 PM Applied Fractional Calculus Workshop Series @ MESA Lab @ UCMerced

  2. 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 AFC Workshop Series @ MESALAB @ UCMerced

  3. Review candidate • An Industrial Model Based Disturbance Feedback Control Scheme • Feed-forward-feed-backcontrol 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 AFC Workshop Series @ MESALAB @ UCMerced

  4. Paper I AFC Workshop Series @ MESALAB @ UCMerced

  5. 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 compensationand anti-windup protection AFC Workshop Series @ MESALAB @ UCMerced

  6. Problem description • The n-dimensional open-loop dynamical column system (Luyben, 1990; Baratti et al., 1998) AFC Workshop Series @ MESALAB @ UCMerced

  7. Further breakdowns AFC Workshop Series @ MESALAB @ UCMerced

  8. The controller design • FF – feed-forward controller AFC Workshop Series @ MESALAB @ UCMerced

  9. The controller design • OF – output feedback AFC Workshop Series @ MESALAB @ UCMerced

  10. The controller design • Combine them together AFC Workshop Series @ MESALAB @ UCMerced

  11. Simulation testing AFC Workshop Series @ MESALAB @ UCMerced

  12. 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. AFC Workshop Series @ MESALAB @ UCMerced

  13. Paper 2 AFC Workshop Series @ MESALAB @ UCMerced

  14. Problem description • The closed loop transfer function AFC Workshop Series @ MESALAB @ UCMerced

  15. The stability condition • Consider: AFC Workshop Series @ MESALAB @ UCMerced

  16. Numerical example 1 AFC Workshop Series @ MESALAB @ UCMerced

  17. Numerical example 1 AFC Workshop Series @ MESALAB @ UCMerced

  18. Numerical example 2 AFC Workshop Series @ MESALAB @ UCMerced

  19. Numerical example 2 AFC Workshop Series @ MESALAB @ UCMerced

  20. Conclusion • Proposed a new control strategy that uses disturbance feedback control with PID controllers. AFC Workshop Series @ MESALAB @ UCMerced

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