A constant which describes the performance of a wind vane in response to a step change in wind direction. It is calculated from the relative amount of overshoot on two successive swings (half cycles) of a decaying oscillation. This specification is dimensionless and is generally between 0.3 and 0.7.
A parameter used to describe the response of a wind vane to a sudden change in wind direction. It is defined as the ratio of the actual damping to the critical damping, where critical damping is that value of damping which gives the fastest transient response without overshoot.
For a second order system, the damping ration, ZETA, is the ratio of the systems actual damping to its critical damping value. If damping is critical, the second order system has two real poles that are equal. Unit of acceleration, equal to a standard value of gravity or an otherwise specified level. (Accelerometer specifications and data supplied by Honeywell use 9.80708 m/s², the constant at Redmond, WA.)
(FACTOR OF CRITICAL DAMPING) Is the ratio of the actual damping co-efficient (C) to the critical damping co-efficient (Cc). The critical damping coefficient is a measure of the minimum damping that will allow a displaced system to return to its initial position without oscillation. For a single mass system it is defined Cc = 2 mwn where m = Mass, Kg; wn = Natural Circular Frequency, radians/sec; Cc = Kg/sec.
ratio of actual damping to critical damping; if the damping ratio is less than one a system is said to be underdamped and if it is greater than one a system is said to be overdamped.
Ratio of actual damping to critical damping. Less than one is an under-damped system and greater than one is an over-damped system.
The ratio of a system's actual damping to its critical damping. When less than 1, the system in underdamped and will exhibit ringing when disturbed. When larger than 1, the system is overdamped and disturbances will die out without ringing.
The damping ratio is a parameter ζ that characterizes the frequency response of a second order ordinary differential equation. It is particularly important in the study of control theory. It is also important in the harmonic oscillator.
