The disadvantage of the fixed method is that it neglects the inherent damping of the primary structure, and a limitation is introduced because an empirically equivalent mass ratio is used.
[[gamma].sub.Fd] is the output force ratio, which is the ratio of the output force of the tank to the inerter system and the uncontrolled tank (caused by inherent damping).
ElectroPuls is driven by a linear synchronous motor and requires additional highquality velocity feedback for precise dynamic control--due to the challenges of driving linear motors with lower inherent damping
than traditional rotary designs.
In all cases, the inherent damping
of sailplane structure was neglected.
"Shaft length is critical for rotor dynamics," explains Barrett, "especially as we use air bearings, which have little inherent damping
. Hence our choice of reverse flow; it allows us to move the combustion chamber out in order not to take up space on the shaft."
The large dynamic displacement attenuates vibration, while the inherent damping
provided by the sliding friction between the strands of the wire rope minimize post-shock noise and lower resonant peaks.
The steel frame estimated inherent damping
of 1% meant unacceptable lateral accelerations.
The inherent damping
effect of the WinDrive hydro-dynamic system reduces the mechanical shocks experienced during "low voltage ride through" and is based on the reliable Vorecon technology of Voith AG, a hydro-dynamically adjustable drive that has been extensively used in the gas turbine industry for many years.
Alan Gent of the University of Akron's Institute of Polymer Science will present, "Strength, wear and friction of rubber." This presentation deals with the elasticity and strength of rubber, its viscoelastic properties that cause rubber to have inherent damping
, and the laboratory measurement and interpretation of tear strength, fatigue resistance and adhesion to wire cord.
Elastomers have been widely used in many areas of technology for achieving acoustic and vibration isolation and damping owing to a unique combination of low modulus and inherent damping
The inherent damping
qualities of the design make the units suitable for vertical applications requiring either noise or vibration control, and the load transfer method ensures torque consistency and repeatability in either direction.
Since the inherent damping
in structural metals is very low, it is necessary to increase the damping of structures made from these materials by the use of appropriately designed damping systems.