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    ryanastiefes

    @ryanastiefes

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    Latest posts made by ryanastiefes

    • RE: Smith Predictor

      What technique did you use to derive the k=16.859, ti=5866.1?

      posted in REXYGEN Studio
      R
      ryanastiefes
    • RE: Smith Predictor

      Currently I'm using the Smith example, I've removed the SOPDT in the Smith predictor with FOPDT as you suggested.

      In the top FOPDT I have:
      Ko .093
      del 720
      tau 5400

      In the bottom FOPDT I have:
      Ko .028
      del 420
      tau 1500

      In the process model I have:
      Ko .059
      del 540
      tau 3600
      tau2 4200

      In the PIDMA I have:
      picture attatched0_1571092692046_pif.PNG

      I am constantly overshooting this simulation, any ideas?

      posted in REXYGEN Studio
      R
      ryanastiefes
    • RE: Smith Predictor

      Good morning Jaroslav,
      My process ranges:
      Gain .028 - .093
      TimeConstant 25min - 90min
      DeadTime 7min - 12min

      posted in REXYGEN Studio
      R
      ryanastiefes
    • RE: Smith Predictor

      See if I am understanding this correctly.
      The 'smith predictor - process model' is my software process. I've updated the gain, Tc, and DeadTime with my known real world process. If I wanted to use this smith predictor example for real world applications I would remove the 'smith predictor - process model' with my real PV signal?

      posted in REXYGEN Studio
      R
      ryanastiefes
    • RE: Smith Predictor

      Nevermind about the PIDMA, looks like I need to upgrade if I want that.

      posted in REXYGEN Studio
      R
      ryanastiefes
    • Smith Predictor

      I have a process that I am controlling using a PLC with a PI controller that is very very slow, process takes around two hours to get up to setpoint and most often over shoots excessively.
      I am looking at using the Smith Predictor as a way to control my process (example project 0303-29). I see where I can insert my SP but dont understand where I would insert my PV, would it be the CNR_INP_DIST?
      Can this Smith Predictor example be used in a real world application? Of course with some minor changes!
      Also I have a license GY8G-H7MH-2U5A-8IFC-9X7U-9XT4-P8IK-LMXU and am trying to use the PIDMA but am getting a error that says I dont have the capability to use that FB.

      posted in REXYGEN Studio
      R
      ryanastiefes