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John Gerry

This article was written and provided by John Gerry P.E., president of Expertune.  Expertune designs pre-packaged industrial software which maximizes productivity and efficiency and reduces waste in the process industries: chemical, pulp and paper, utilities, refining, and food processing.  For more information on Expertune, please visit their website at: www.expertune.com.
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8 Results Found
  • News

    Derivative Action - The Good, Bad, and Ugly

    The reason to use derivative (or D) is that you can use more Proportional and especially more Integral action. The result can be a much faster reacting control loop.
    By: John Gerry
    25 February, 2020 | 3 minutes
  • PID Tuning Tips - How to Linearize Your Process
    News

    PID Tuning Tips - How to Linearize Your Process

    A non-linear process will have different response across the operating range. It will be sluggish at one end of the range and comparatively faster or even oscillatory at the other.
    By: John Gerry
    05 February, 2020 | 2 minutes
  • How to Control a Process With Long Dead Time
    Feature

    How to Control a Process With Long Dead Time

    A process with a large dead time presents a special challenge for a controller - any controller. Find out how to get the best control of large dead time processes.
    By: John Gerry
    29 June, 2003 | 4 minutes
  • News

    Ziegler-Nichols Tuning Rules And Limitations

    The standard reference for PID tuning seems to be the Ziegler-Nichols tuning rules developed in 1942 on a pneumatic controller.
    By: John Gerry
    07 February, 2003 | 1 minutes
  • Should You be Using Lambda Tuning?
    News

    Should You be Using Lambda Tuning?

    A tuning method based on achieving smooth set point response is becoming more popular. The method guarantees stability, robustness and no overshoot. Shouldn't you be using it?
    By: John Gerry
    04 February, 2003 | 3 minutes
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