Perceiving Excitation Characteristics from Interactions between Field Road and Vehicle via Vibration Sensing

Table 3

Statistics of calculation results of excitation point wavelength, spatial frequency, and quadruple frequency of original pavement roughness signal.

Span (unit: cm)	Wavelength, λ (unit: m)	Spatial frequency, n (unit: m^−1)	Quadruple frequency time frequency (unit: Hz)
			Fundamental	Double	Triple	Quadruple
10	0.7	1.429	0.794	1.588	2.382	3.176
20	0.8	1.250	0.694	1.388	2.082	2.776
30	0.9	1.111	0.617	1.234	1.851	2.464
40	1.0	1.000	0.556	1.112	1.668	2.224
50	1.1	0.909	0.505	1.010	1.515	2.020
60	1.2	0.833	0.463	0.928	1.391	1.854
70	1.3	0.769	0.427	0.854	1.281	1.708