CONTROLLING A VERY NOISY SYSTEM.
LOUISIANA STATE UNIV BATON ROUGE COLL OF ENGINEERING
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The conventional approach to feedback control does not seem to take full advantage of the digital computers capability. In fact, Lopez has shown that the analog controllers neglecting nonidealities are capable of superior performance over their discrete counterparts. Although this may not be the case in practice, it appears unlikely that the digital algorithm in intself offers enough improvement over its analog counterpart to justify the extra expenditure for the digital computer. A second problem with the conventional approach to feedback control lies in the tuning of the controller or algorithm parameters. Automated tuning techniques are one answer, the current approach being to relate the control settings to parameters in a model of the process. However, if a model of the process is available, then why not use it to develop a control algorithm more compatible to the process than the two- or three-mode algorithm. This article explores this kind of reasoning by examining a control strategy for a simulated stirred-tank chemical reactor. This system will be modeled and then controlled by a control strategy determined from the model. Author
- Industrial Chemistry and Chemical Processing
- Statistics and Probability
- Test Facilities, Equipment and Methods