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Industrial control electronics : Applications and design
In this chapter you will look closely at what automatic controls are supposed to do. The elements necessary to provide control are presented. These are often arranged by how they control, either open loop or closeed loop. Examples of each are given. Control systems are also classified by what they control. Servomechanism control systems (control of movement) and process control systems (control of temperature, flow, pressure, etc) are both illustrated.
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