Analog PID Controller Project

Discussion in 'The Projects Forum' started by mokong, Nov 24, 2011.

  1. mokong

    Thread Starter New Member

    Oct 14, 2011
    6
    0
    Hi,

    I need some help on how to build an analog PID Controller (closed Loop) for DC motor with tachometer from scratch. I attached the link of the block diagram of the whole design. I already built the two low pass filter. The first low pass filter has cutoff freq = 4 kHz and the other vary from 100 Hz to 1 kHz before the difference circuit. I used a butterworth response. I will be using single supply op amp (AD8**) for the whole design.
    The speed of the motor can go up to 4 kHz.

    I am wondering how can I build or compute all the components value for my PID controller(proportional,integrator, differentiator) , difference circuit, summing circuit, and buffer circuit?
    I've been searching online about the set up of PID controller with difference circuit, summing circ, buffer circuit.

    Where do I start from here?

    Can anyone guide me to the step by step process of building this design?
    Because I am really new of how to build a closed loop PID controller.
    Thank you for any help.

    here is the link for the block diagram: http://imageshack.us/photo/my-images/42/pid.png/
     
    Last edited: Nov 24, 2011
  2. crutschow

    Expert

    Mar 14, 2008
    13,009
    3,233
    Tuning PID loops can be a tricky and sometimes difficult process. A Google search turned up many articles on that. I suggest you read a few to get familiar with what is required.
     
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