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damping factor calculation

damping factor calculation

damping factor calculation

(OP)
Hello, i'm tryng to calculate the damping factor and damping ratio from some data i gathered. I have plotted the results so i'm trying to use the logarithmic decreament method.

I have measured the amplitudes, so i have Xn and Xn+m, but i keep getting -ve results, and i'm sure thats not right. Surely i should be getting a value lower than 1 as the data clearly shows the system to be under damped.

Any thoughts on where i'm going wrong?

Cheers

RE: damping factor calculation

sounds like you have found the log "increment" (the inverse)- but i agree not much of a description

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