Application of dynamic matrix control method on the recovery area of a pulp and paper mill
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"This work attempts to widen the scope of application of DMC to the chemical recovery area of a pulp and paper mill. The method will be used as a centralized controller in the plant where the liquid levels of temporary storage tanks and the flowrates out of these tanks must be regulated. The results generated by DMC will be in the form of a sequence of manipulations on the control variables, which, in this case are the flowrates out of the tanks. To measure the performance of DMC, the following three criteria will be used: a) Robustness The controller should remain stable and reliable in the face of modeling errors, measurement noise, and unmodeled disturbances. b) How well it works The results generated should be acceptable error from the target values. c) How easy it is to implement within an The implementation of this controller should be simpler than that of the methods already in use. This study also includes the incorporation of the system's simulation with constraint mechanisms added to the algorithm to limit the control sequence of DMC to within the physical range of the controlled system. The overall task with which DMC will be tested is to maintain the liquid levels in serially connected tanks within their high and low limits while the system throughput is held to a given value. Chapter 2 of this report is a review of recent developements in process control. The system to be controlled by DMC will be described in chapter 3. In chapter 4, the results from this control algorithm will be analyzed. Chapter 5 addresses some comparisons between DMC's control approach and that of a production scheduling system developed by Fisher Controls International Inc. The final chapter summarises the salient points learned about DMC and the conclusions derived from this study."--Page 2.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License.