Different Automation Strategies
Different Automation Strategies
- ON – OFF Control
- Open-Loop Control
- Feed- Forward Control
- Closed-Loop control
ON – OFF Control
It is also called as two- position control system that has only two states fully on and fully off. It is the oldest type of control strategy that gives simple on- off mechanism for the set limits.
Open-Loop Control
In this control structure, control action is not a function of process variable or any load changes. This is also not a self-correcting one. This control scheme independently calculates control output needed to the actuator to produce the desired response.
Feed- Forward Control
This control scheme is implemented to reduce the effect of input disturbance on process. A sensor in this system detects the disturbances or any load changes in the process, and then controller calculates the necessary signal to the actuator
Closed-Loop control
Closed-loop control scheme is widely implemented in many of the industrial control applications. It uses the output measurement as feedback signal; and, it is compared with desired or set-point value
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