I would like to validate the use of mscohere for impact test data, using an instrumented hammer that measures force and an accelerometer to measure response. I ran some artificial cases – see attached pdf. Single input, single output. I tried to force mscohere to use only 3 windows of data, one for each impact test. The first half of results are for sinusoidal input and output, and the second half are for a simulated impact input. There are 2 time domain plots in there. The inputs are the 3 input vectors stacked vertically, and the 3 output vectors stacked vertically. Sample rate is 1000 Hz, with a 4 second window and 0.25 Hz resolution. I am using a rectangular window:
[coherence, frequencies2] = mscohere(coherenceInput, coherenceOutput, rectwin(windowLength), 0, windowLength, sampleRateHz);
The results look about right to me, but I would like to validate it against some known or anlytical results. Are there any suitable examples available?
Also, how do I check that it is getting the absolute basics right – for example, is it using the 3 windows of data that I want it to use?I would like to validate the use of mscohere for impact test data, using an instrumented hammer that measures force and an accelerometer to measure response. I ran some artificial cases – see attached pdf. Single input, single output. I tried to force mscohere to use only 3 windows of data, one for each impact test. The first half of results are for sinusoidal input and output, and the second half are for a simulated impact input. There are 2 time domain plots in there. The inputs are the 3 input vectors stacked vertically, and the 3 output vectors stacked vertically. Sample rate is 1000 Hz, with a 4 second window and 0.25 Hz resolution. I am using a rectangular window:
[coherence, frequencies2] = mscohere(coherenceInput, coherenceOutput, rectwin(windowLength), 0, windowLength, sampleRateHz);
The results look about right to me, but I would like to validate it against some known or anlytical results. Are there any suitable examples available?
Also, how do I check that it is getting the absolute basics right – for example, is it using the 3 windows of data that I want it to use? I would like to validate the use of mscohere for impact test data, using an instrumented hammer that measures force and an accelerometer to measure response. I ran some artificial cases – see attached pdf. Single input, single output. I tried to force mscohere to use only 3 windows of data, one for each impact test. The first half of results are for sinusoidal input and output, and the second half are for a simulated impact input. There are 2 time domain plots in there. The inputs are the 3 input vectors stacked vertically, and the 3 output vectors stacked vertically. Sample rate is 1000 Hz, with a 4 second window and 0.25 Hz resolution. I am using a rectangular window:
[coherence, frequencies2] = mscohere(coherenceInput, coherenceOutput, rectwin(windowLength), 0, windowLength, sampleRateHz);
The results look about right to me, but I would like to validate it against some known or anlytical results. Are there any suitable examples available?
Also, how do I check that it is getting the absolute basics right – for example, is it using the 3 windows of data that I want it to use? mscohere MATLAB Answers — New Questions

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