I do not know if there is a standard symbol for damping, but "Seismic Sensors and their Calibration" by Dr. Erhard Wielandt calls it "h". The relation between Q and h is Q=0.5/h. For critical damping, h=1.0 and Q=0.5. If the sensor Q is set to 0.707, the damping is also 0.707, and the sensor response is identical to a 2nd order Butterworth filter whose corner frequency is the natural frequency of the pendulum. The corresponding overshoot is 4.33 per cent. This is where I would like to keep my sensors, even though my WQFilter.exe" utility can compensate the data for almost any amount of under-or-over damping. Bob Geoffrey wrote: Hello Bob & PSN; Im not so sure this stuff is correct because its my understanding that Q and Damping are simply inverses of each other just like Period and Frequency. I was unable to get the inverse result simply by alternately clicking the buttons using the same input values. Like Q = 1 then damping = 1 Like Q = 0.5 then Damping = 2 Like Q = 2 then damping = 0.5 ??? Also, Whats the proper symbol for damping? ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tourI do not know if there is a standard symbol for damping, but "Sei= smic=20 Sensors and their Calibration" by Dr. Erhard Wielandt calls it "h". The rela= tion=20 between Q and h is Q=3D0.5/h. For critical damping, h=3D1.0 and Q=3D0.5.If the sensor Q is set to 0.707, the damping is also 0.707,= and=20 the sensor response is identical to a 2nd order Butterworth filter whose cor= ner=20 frequency is the natural frequency of the pendulum. The corresponding oversh= oot=20 is 4.33 per cent. This is where I would like to keep my sensors, even=20 though my WQFilter.exe" utility can compensate the data for almost any amoun= t of=20 under-or-over damping.BobGeoffrey wrote:
Hello Bob & PSN;Im not so sure this stuff is correct because
its my understanding th= at Q=20 and Damping
are simply inverses of each other just like
Period and=20 Frequency. I was unable to
get the inverse result simply by
alternatel= y=20 clicking the buttons
using the same input values.Like Q =3D 1 then damping =3D 1
Like Q =3D 0.5 then Damping =3D 2
Like Q =3D 2=20 then damping =3D 0.5
???
Also, Whats the proper symbol for=20 damping?
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