Describe the implimentation of proportional type of controller using hydraullic controller.

Describe the implimentation of proportional type of controller using hydraullic controller.
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Answer :

Diagram:

image

Explanation: * When the jet pipe is moved towards right by the deviation the signal, the position moves to the right along with the feedback linkage whose motion acts to bring the jet pipe back to its neutral position. * Thus for every unit deviation there is some fixed piston position that actuates the final element to certain opening that brings about the necessary correction in the measurement which is nothing but “P‟ action control. 


OR


Implementation of proportional type hydraulic controller :  * The jet pipe hydraulic proportional controller is explained. * For getting the P action the amplifier should get feedback signal. In hydraulic P controllers, proportional feedback is accomplished by a feedback linkage that transmits piston movement to the spring about a movable pivot as shown in Fig.

image

Working: * When the jet pipe is moved towards right by the deviation signal, the piston moves to the right along with the feedback linkage whose motion acts to bring the jet pipe back to its neutral position. Thus for every unit of deviation, there is some fixed piston position that actuates the final element to certain opening that brings about the necessary correction in the measurement which is nothing but P action control. PB adjustment can be done by changing the position of movable pivot that regulates the amount of piston motion required to restore the jet pipe to neutral position. 

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