This application note describes a closed loop, computer- controlled, variable attenuator for the control of output power from a tunable laser. It is based on the combination of a 1/2 wave-plate and a ...

In programming, a variable that keeps track of the number of iterations of a process. Its value is incremented or decremented with each iteration, and it is compared to a constant or other variable to ...

Just over a decade ago, an article titled, "Advanced Control Strategies Move into the Field" (Control, October 2008), highlighted three evolving trends in the process control world that would "make ...

Forbes contributors publish independent expert analyses and insights. Scott Hutcheson teaches leadership at Purdue University. When disruption strikes, leaders often find themselves overwhelmed by a ...

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