PID loops are a central component of modulating boiler control systems with applications ranging from basic steam header pressure control to cascading 3-element drum level control. A modern ...

A linear control variable yields a uniform surge margin across the full operating range and simplifies both closed-loop and ...

Learning the basics can ease loop tuning frustration and ensure stability. During plant operations, it seems that tuning control loops is an ongoing task, which can be a continual frustration to ...

Some operators think so, observes Terry Blevins, principal technologist with Austin, Texas-headquartered Emerson Process Management’s (www.emersonprocess.com) DeltaV Product Engineering group.

Switching power supplies rely on feedback control loops to ensure that the required voltage and current are maintained under varying load conditions. Design of the feedback control loop influences ...