Figure 9 depicts a reactor vent pressure control loop, with the valve position used to control overhead pressure on the reactors. When the loop was in the auto mode it cycled strongly. Similarly to ...

This PID loop will need a lower gain and higher integral setting (or higher proportional band, lower repeats/minute). An opposite example would be a boiler steam pressure PID control loop, where there ...

For our programming example, we use a PC104-based microcontroller to calculate the PID loop and generate velocity commands. The output drives a VH-5C rotary table from Fadal Machining Centers.

But, as Nash also remarks, “The aging workforce, the effect of the current recession and other factors are forcing a change in that cultural viewpoint.” And user-friendly, time-reducing advances in ...