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 days when converter manufacturers would have little option but to rely on the expertise of power-module specialists to design filters, optimize the control loop, and provide the result, have given ...

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 ...

Closed-loop control troubleshooting By Jacques Smuts, PhD, PE Automation Basics Summary By Jacques Smuts, PhD, PE Every plant in the process industry most likely has several control loops that do not ...

This paper proposes an extension to the established loop-shaping method, where the loop-shaping method is modeled mathematically and solved as a mathematical optimization program. In this process, a ...

Electronic control logic and system components are described that are used with a venturi carburetor to accomplish the fuel metering required in a closed loop emission control system. Special open ...

Their presence still confounds the most experienced control system engineers. That is why single-loop control is still the mainstay of process control, and why those trends discussed earlier (or any ...