D.I. Wilson (New Zealand)
embedded controllers, relay auto tuners, intelligent control, frequency response identification, pathological plants 1 The need for intelligent control The motivation for this work is to modify a simple low cost industrial controller to provide auto tuning capability with some intelligence. Intelligence in this context is de fined as a controller with some of the characteristics listed in [1]. The rationale for intelligent or expert controllers in process control applications is quite simp
Controllers that possess a higher degree of automation than standard controllers are known as expert or intelligent con trollers. This paper describes the developmentof a low-cost micro-controller based commercial PID controller with a modest level of heuristics combined with logic to provide one-button autotuning, and the ability to flag troublesome plant dynamics which require more sophisticated control algorithms.
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