M s to hz converter




















As a result, the equation for the lines connecting the breakpoints in displacement density becomes:. Now, we can integrate this from f 1 to f 2 to get the area under the displacement line. Then, we can sum the areas to get the mean-square displacement and take the square root of the value to get RMS displacement for the random spectrum.

When using acceleration units in G, you also need to apply a conversion factor such as Equation 10 to get a suitable displacement unit. However, we are more likely to be interested in peak-to-peak displacement rather than RMS displacement because shaker travel limits are rated as a peak-to-peak value. The vibration is Gaussian random, so it is not possible to find an absolute peak value. Still, we can compute an average or typical peak value.

For Gaussian random values, the average one-sided peak level is about three times the RMS value also called the 3-sigma level. To get double-sided displacement—e. It is important to understand that this value is the typical peak-to-peak displacement value and will occur relatively frequently during the test.

These peak heights can only be defined in terms of probabilities. Therefore, the appropriate question is not how high the peaks are but how often they will reach that height. There is a 0. This probability is small but not impossible. Sine-on-Random tests have background random vibration with one or more sine tones overtop. The background random levels are computed the same as standard random as described above. The sine tones add to the random in the mean-square.

We must sum all the squared values of the RMS levels, then take the square root of the result to calculate the overall RMS value. The sine tones are normally defined by their peak acceleration, so they must be converted from peak to RMS. For a sine tone, this is as simple as dividing the peak value by the square root of 2.

Using the background random as defined above and add sine tones of 1. Velocity functions the same way. Convert the acceleration to velocity using Equation 6 , then convert the result to the appropriate velocity unit. Study now. See answer 1. Best Answer.

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