Auto 1 - PID Control PDF
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Summary
This document presents an overview of automatic control, focusing on the principles behind PID controllers. It includes diagrams and explanations of various types of controllers such as proportional, integral, and derivative controllers. The document seems to be a part of a larger educational resource related to automatic control.
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Auto 1 Transmitters: The transmitted pressure is approximately proportional to the movement of the flapper and thus the change in the measured variable. Controller Action The control system is designed to maintain some output value at a constant desired value, and a knowledge of the variou...
Auto 1 Transmitters: The transmitted pressure is approximately proportional to the movement of the flapper and thus the change in the measured variable. Controller Action The control system is designed to maintain some output value at a constant desired value, and a knowledge of the various lags or delays in the system is necessary in order to achieve the desired control. The controller must therefore rapidly compensate for these system variations and ensure a steady output as near to the desired value as practicable. Two Step Controller / On-Off Controller In this, the simplest of controller actions, two extreme positions of the controller are possible, either on or off. If the controller were, for example, a valve it would be either open or closed. Proportional Control Integral Control This type of controller action is used in conjunction with proportional control in order to remove offset. Derivative Control Derivative or rate action is where the output signal change is proportional to the rate of change of deviation. A considerable corrective action can therefore take place for a small deviation which occurs suddenly
