UNDERSTANDING CLOSED-LOOP FAN SPEED CONTROL By Ken W. Gay, SMSC When implementing cooling solutions for electronic equipment, system designers are confronted with a complex set of variables.

The open-loop heating system has some advantages, including design simplicity and ease of maintenance. With only voltage applied to a heat source, this method does not require an elaborate control ...

For example, traditional step motor systems run in open loop control. That means the drive electronics continuously supply current to the motor whether or not the load is demanding torque.

There are two control options for hydraulic systems: open-loop and closed-loop. In general terms, an open-loop system cannot compensate for any disturbances that alter the controller’s driving ...

Self-regulating systems with feedback loops, i.e., the routing back of the output of a system to its input, have existed since antiquity and have since become an integral part of modern technology.

A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available instrumentation amplifier Brian Keeney ...

Festo’s latest release to its pneumatic tech line — Controlled Pneumatics — is particularly interesting considering this ongoing decision for engineers. By adding a digital closed-loop control ...

Gajanana C. Birur, Kenneth R. Johnson, Keith S. Novak, Tricia W. Sur, Thermal Control of Mars Lander and Rover Batteries and Electronics Using Loop Heat Pipe and Phase Change Material Thermal Storage ...

If you don’t think control systems are everywhere, consider an example we use when talking to school kids: a toilet. A very simple and very common closed loop control system.

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 ...