I have a system which is sampling at 100Hz. There is only one input for the system. The output is similar to cosine waveforms with varying frequency. I have no clue how to find out the exact formula to put into the cosine function to generate the exact output as the system. Please give me some suggestion. Thanks
Here are some data
When input = 0.1, local max occurs at the following data points
1 3545 5014 6140 7090 7927 8684 9379
When input = 0.2,
1 2507 3545 4342 5014 5605 6140 6632 7090 7520 7927 8314 8684 9038 9379 9709
When input = 0.3,
1 2047 2895 3545 4094 4577 5014 5415 5789 6140 6473 6788 7090 7380 7658 7927 8187 8439 8684 8922 9153 9379 9600 9816