Exam Question
With reference to control system, state what is meant by:
(a) Two step action (6)
(b) Proportional control (5)
(c) Offset (5)
Class 4 (4th Engineer)
MEKG
📅 Aug 2023
Reference Answer
**(a) Two-step action (ON/OFF Control)**
Two-step action, also commonly known as ON/OFF control or discontinuous control, is the simplest form of feedback control.
* **Definition:**
* It is a control strategy where the controller output is switched discontinuously between two discrete states, typically fully 'ON' or fully 'OFF', based on whether the process variable is above or below a predetermined setpoint.
Two-step action, also commonly known as ON/OFF control or discontinuous control, is the simplest form of feedback control.
* **Definition:**
* It is a control strategy where the controller output is switched discontinuously between two discrete states, typically fully 'ON' or fully 'OFF', based on whether the process variable is above or below a predetermined setpoint.
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