2007-12-31 06:50:38 · 4 answers · asked by robzr6 1 in Science & Mathematics ➔ Physics
rms has a very specific mathematical definition.
it is the square root of the mean of the square of the function (for periodic functions, the mean is evaluated by an integral over one period)
any basic engineering text should have the precise definition.
2007-12-31 06:55:09 · answer #1 · answered by T M 6 · 2⤊ 0⤋
To take a very simple example:
take the numbers 1, 2 and 3
square them: 1, 4, 9
take the mean: (1 + 4 + 9)/3 = 4.67 to 3sf
take the sqrt of this: 2.16 to 3sf.
So we have taken
the square root of ( the mean of [the squares of {the data} ] )
2007-12-31 20:17:35 · answer #2 · answered by Red Campion 2 · 0⤊ 0⤋
rms value = is the square root of the mean value of the squared ordinates
2007-12-31 11:47:50 · answer #3 · answered by Paddy 4 · 0⤊ 0⤋
T M has the right answer. Basically it's taking all your measured values, squaring them, then taking the average of those squared values and finally taking the square root of that.
So think backwards; square, then mean, then root.
2007-12-31 07:10:45 · answer #4 · answered by Steve H 5 · 3⤊ 0⤋