Tag Archive: characterization

Apr
22

Capturing Process Dynamics

When the on-demand tuning application resides in a DCS workstation, communications between the controller and the workstation can introduce variable delay and jitter in the observed process response. As addressed in Chapter 4 of Advanced Control Foundation – Tools, Techniques, and Applications, the process may be more accurately identified by distributing the on-demand tuning functionality …

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Apr
15

On-Demand Tuning

During the commissioning of feedback control based on the PID algorithm, the PID tuning parameters (that is, the proportional, integral, and derivative gain) must be set to specific values to achieve the best controller response to setpoint and disturbance input changes. To minimize process variations and the response time to setpoint and disturbance input changes …

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Jan
03

Process Characterization – Integrating Process

In some cases, a step change in a process input will result in the process output changing continuously. A process that exhibits such a response is known as an integrating process. As part of the chapter on process characterization in Chapter 9 of Control Loop Foundation, we address integrating process response. In the process industry, …

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Dec
27

Process Characterization – Inverse Process Response

Process characterization is the identification of the dynamic responses of a process to changes in its inputs. As part of the chapter on process characterization in Chapter 9 of Control Loop Foundation, we address inverse process response. A few processes exhibit a behavior where for a step change in input, the output initially changes in …

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