![]() On/off or ‘Bang-Bang’ control - this is the simplest form of closed loop control, and is exemplified by a domestic heating system with a room thermostat. Although the tap can be operated by a user to regulate water flow, the hose has no feedback mechanism to ‘close the loop’ for automatic regulation. One example is a garden hose, connected to a tap. Then, we focus in on PID controllers and how they operate. Accordingly, we start by explaining the control system hierarchy that exists today, and showing how PID control fits into this. ![]() However, they come in many types, of which PID control is just one, albeit the most sophisticated. (Source: Adobe Stock) A control system hierarchyĬontrol systems are ubiquitous in industrial, medical, military, automotive, utility and many other applications - and sometimes appear in our daily lives. ![]()
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