Explore a comprehensive collection of questions and answers on Automatic Process Control.
What is the Actuating Signal?
The difference between reference Input and feedback is called actuating signal.
What is the Automatic Control?
This is the mechanism that measures the value of Variable quantity. And operates by correcting the deviation.
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What is the Control Ratio?
The response of the Controlled Variable to the change in reference input is called control ratio.
What is control System?
It is a condition or particular quantity of a body, process, machine or controllable.
What is the Control variable?
The condition or quantity of a controlled system that can be directly measured or controlled.
What is the controlling means?
Those elements of the automatic controller that are involved in producing corrective action.
What is the Dead time?
The difference in response obtained by changing an input. That difference is called dead time.
What is the Dead zone?
The largest range of values of an input variable over which a response is not received.
What is the derivative action?
It is a control action in which there is a continuous linear relationship between the derivative of the actuation signal and the output signal.
What is the derivative time?
When the input is linear with time, the time difference with which the output of the controller loads the input is called derivative time. And it is also called rate time.
What is the deviation?
The difference between the value and set point of the controlled variable at any moment is called derivation.
What is the error ratio?
The response of the actuating signal of a closed loop system to the reference input change is called error ratio.
What is the final control element?
The position of controlling means which directly determines the value of the manipulated variable is called final control element.
What is the transfer locus?
This is a plot of the magnitude and phase angle of the sinusoidal response of the system.
What is the static error?
The steady state derivation obtained due to change in the value of set point is called static error.
What is the set point?
The controlled variable has a selected reference value from which maintenance is done.
What is the servo mechanism?
This is the feed back control system. In which the controlled variable is in mechanical position.
What is the response time?
The time taken by the set point or disturbance of a system for the output to reach the specified value is called the response time of the system or element.
What is the reference input?
The established signal is called reference input for comparison with the feed back control system.
What is the rest rate?
It is the inverse of integrate time.
What is the range ability?
The ratio of maximum controllable flow and minimum flow through the final control element is called range ability.
What is the proportional sensitivity?
This is the steady state rate of change in the controller output variable and change in the actuating signal.
What is the P-action?
This is that action of the controller in which there is a continuous linear relation between the value of the controlled variable and the output signal of the controller.
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