Triaxial acceleration data from UAV propeller blades: pre- and post-small-scale tip fracture tests on a custom-built rig (raw signals)

The sensitivities for the X, Y, and Z axes are 251.75 mV/g, 248.49 mV/g, and 249.90 mV/g, respectively, with the rotational speed held at approximately 3,220 RPM. The data are divided into two groups: Group 1 contains raw triaxial acceleration data from 18 healthy blades, while Group 2 includes remeasured raw triaxial acceleration data from 2 healthy blades (B-7 and B-13) and 5 blades with progressive tip fractures (2, 4, 6, 8, and 10 mm).

This is because the damage evaluation was conducted at a separate time from the initial healthy blade tests. Due to mechanical relaxation of the steel wire ropes and environmental fluctuations, directly comparing Group 2 to the initial Group 1 would introduce systematic errors. Therefore, a dynamic re-baselining strategy was applied, using contemporaneous measurements of B-7 and B-13 to establish an updated reference spectrum.</p>