The movement and response characteristics of bit during percussion process, [tau], and transfer rate of energy caused by percussion, an efficiency, depend on [m.sub.r] and [beta], where increase in [m.sub.r] leads to
overdamping of bit movement characteristics due to [tau] by piston and reduction in drilling efficiency due to internal energy effect by mass of drill bit.
Therefore, when c > [c.sub.c], it represents the
overdamping coefficient, and when c < [c.sub.c], it is the underdamping coefficient.
The continuous black solid line was the response of
overdamping system, and it had no overshoot and a stable value at the end.
And the effects of the different damping coefficients including the underdamping coefficients and
overdamping coefficients on the SNR are investigated.
Patient-ventilator synchrony was higher with the facemask than with the helmet as the helmet's large inner volume and compliance caused
overdamping of the inspiratory pressure rise.
Results have shown, that "
overdamping" fault resistance ranges between 20 [OMEGA] and 50 [OMEGA].
The critical radius where the bubble behavior changes from damping oscillation to
overdamping one is obtained from the condition f = 0:
A number of factors are thought to contribute to suboptimal damping; air bubbles within the tubing system dramatically increase the CoD, as do blood clots--both resulting in
overdamping, while excessive lengths of tubing reduce the CoD, resulting in underdamping.
On the contrary, A signal with low Q-factor is considered as
overdamping. There are no oscillations in
overdamping signals.