Vance VanDoren, Ph.D., P.E.


Mechatronics and Motion Control September 26, 2011

Disturbance-Rejection vs. Setpoint-Tracking Controllers

Designing a feedback control loop starts with understanding its objective as well as the process’s behavior.

By Vance VanDoren, Ph.D., P.E.
Control Systems March 1, 2007

The Three Faces of PID

Although proportional-integral-derivative (PID) controllers dominate the process control landscape, they do have their limitations. PID loops can be difficult to configure properly, their behavior is not easily understood, and when they fail to produce the desired closed-loop performance, they can be difficult to troubleshoot.

By Vance VanDoren, Ph.D., P.E.
PID, APC November 1, 2006

From Math to Models

Unlike a plastic or clay model that shows the appearance of an object, a process model shows how a controlled process reacts to control efforts and disturbances. A process model generally takes the form of mathematical equations that quantify the relationship between the process’ inputs and its outputs.

By Vance VanDoren, Ph.D., P.E.
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