Question: An engineer performs a random excitation test for 6 0 s , with the excitation spectrum spanning 5 - 2 0 Hz . The structure

An engineer performs a random excitation test for 60s, with the excitation spectrum spanning 5-20Hz. The structure is measured using a camera operating at 30 frames per second. The results are not as expected, suggesting they are inaccurate. What should be done to improve the accuracy?
Increase the resolution of the camera.
Record using a higher frame rate.
Record for longer than 60s.
Convert displacement data to acceleration

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