Basics of Control Systems
The chapter explores the generic function of control systems in monitoring the current state of critical elements of converting processes and communicating the data to a device capable of regulating that element. Adjustment of such devices may occur automatically or through human interaction. Application of control theory essentials to some specific converting processes is presented. The roles in such systems of various devices, for example, programmable logic controllers (PLCs) and human–machine interfaces (HMIs), and proportional-integral-derivative controllers (PID) in integrated distributed control systems (DCSs) are presented. Examples are provided of open-loop and closed-loop control systems for converting processes. ...
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