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  • 简介:Contents ACKNOWLEDGEMENT xiii ABOUT THE AUTHORS xv FOREWORD xvii Chapter 1 INTRODUCTION 1 Chapter 2 SETTING THE FOUNDATION 5 Practice, 5 Overview 5 Opportunity Assessment 12 Examples 15 Application, 20 General Procedure 20 Application Detail 26 Rules of Thumb 74 Theory, 76 Process Time Constants an
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  • 简介:9 Model Predictive Control Practice Overview Model predictive control has been proven by a group of companies to pro vide benefits, in the right applications, that are greater than those achieved from the improvement of basic control systems [9.17]. The greatest bene fits are realized in applicatio
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  • 简介:60 Advanced Control Unleashed in the process. The integral time factor is decreased and can be as small as 1/8 of the ultimate period for a pure dead time process. Figures 2-25a through 2-25f show the effect of the three mode settings on a PID controller for a process with a time lag 4 times larger
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  • 简介:431 Index Term Links abnormal conditions 137 145 149 164 inputs 154 situation management 91 163-166 169 176 180 actuator 31 131 356 416 adaptive control 225-227 232 tuning 153 226 231 advanced process control 1-5 89 101-102 116 261-262 alarm flooding 164 166 alarm screening 164 166 168 aliasing 20
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  • 简介:Advanced Control Unleashed Plant Performance Management for Optimum Benefit Terrence L. Blevins Gregory K. McMillan Willy K. Wojsznis Michael W. Brown ISA-The Instrumentation, Systems, and Automation Society Notice The information presented in this publication is for the general education of the re
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  • 简介:8 Properties Estimation Practice Overview When critical measurements are slow to reflect process changes or only lab analysis is available, then parameter estimation can often be used to improve the performance of control and monitoring applications. The old saying, “You can t control what you
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  • 简介:Appendix D Top 20 Mistakes Made Today and Every Day for the Last 40 Years Reprinted with Permission from Control Magazine [1] 1. Control valve pressure drops that are not engineered. If you consistently see 5 or 10 psi pressure drops or line size control valves, the process or instrument engineers
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  • 简介:360 Advanced Control Unleashed In the manual mode of operation, the user may examine the process response for changes in the manipulated inputs to the processes. The con trol response to a set point change is observed in the automatic mode. To allow the control to be tested in the presence of noise
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  • 简介:282 Advanced Control Unleashed Figure 8-11. Comparison of Estimator and Feedback Model The final element in the estimator structure is the feedback correction. The output of the feedback model block generates a signal that is compared to the feedback element. The difference is the modeling error du
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  • 简介:Chapter 2 - Setting the Foundation 35 Finally, isolation transformers and best practices must be used to prevent the introduction of noise from the inverter into the electrical ground sys tem. Consequently, the installed cost and the life-cycle cost of a VSD may be more than a control valve if isol
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  • 简介:Appendix C Definitions action - relative direction of change in output for a change in input “direct“ for changes in same direction and “reverse“ for changes in opposite direction automatic mode - PID controller mode to enable its set point to be locally adjusted by the operator also known as LO
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  • 简介:Chapter 9 - Model Predictive Control 337 Figure 9-23. Potential for Reducing Batch Time Using MPC Figure 9-24. MPC Configuration for Batch Reactor Control Application General Procedure The general procedure to be followed to develop and install a model pre dictive controller is as follows 1. Devel
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  • 简介:10 Virtual Plant Practice Overview A virtual plant environment is essential for the testing of control systems and processes and the training of operators and engineers before and after startup. The capital cost associated with a new plant or a major plant expansion in the process industry often in
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  • 简介:2 Setting the Foundation Practice Overview The advanced control projects with the largest benefits usually have made significant improvements in the basic regulatory control system. While advanced process control APC techniques can partially compensate for such limitations as missing measurements
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  • 简介:142 Advanced Control Unleashed form a sub-space, and projecting the observations down onto this sub-space will allow us to visualize how our observations relate to our PCA model of the process. A common technique for real-time monitoring is to connect the observations in the scores plot, forming a
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