Though simple, this “open loop” form of fan control has disadvantages. Since there is no feedback mechanism, speed accuracy depends entirely on mechanical tolerances of the fan. Although it may not ...

The company’s Alphastep Hybrid Control System uses a unique combination of open- and closed- loop control methodologies. Typically, open-loop control systems do not take in any feedback from the ...

One segment of a process control system. An open-loop control process requires human intervention, whereas a closed-loop system is entirely automated (see PID). See process control. THIS ...