The headline above is a reminder that a fan and a damper, when assembled, become a fan + damper system, which is more than a simple sum of the two individual items of equipment. They may be operated ...

In most fan systems a single fan is selected for the required system design rating. Various methods of control are employed such as dampers, variable inlet vanes, variable pitch blades, or variable ...

Semi-active dampers were conceived in early 1970s as controllable devices with time-variable dissipative properties. Since then these devices were closely studied, developed and applied.

SAE Transactions, Vol. 109, Section 6: JOURNAL OF PASSENGER CARS: MECHANICAL SYSTEMS JOURNAL (2000), pp. 132-139 (8 pages) A new vehicle suspension control system that enhances vehicle stability and ...