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[ pdf ] Introduction to PID Control

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Source: ee.sharif.edu 
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Last download on: Thu Jul 20, 2017 09:43:07 AM
Short Desciption:
Introduction to PID Control Introduction This introduction will show you the characteristics of the each of proportional (P), the integral (I), and the derivative (D) controls, and how to use them to obtain a desired response. In this tutorial, we will consider the following unity feedback system:

Summary:
General tips for designing a PID controller When you are designing a PID controller for a given system, follow the steps shown below to obtain a desired response. 1. Obtain an open-loop response and determine what needs to be improved 2. Add a proportional control to improve the rise time 3. Add a derivative control to improve the overshoot 4. Add an integral control to eliminate the steady-state error 5. Adjust each of Kp, Ki, and Kd until you obtain a desired overall response. You can always refer to the table shown in this document to find out which controller controls what characteristics. Lastly, please keep in mind that you do not need to implement all three controllers (proportional, derivative, and integral) into a single system, if not necessary. For example, if a PI controller gives a good enough response (like the above example), then you don't need to implement derivative controller to the system. Keep the controller as simple as possible.
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