The Reduction of Modal Sensor Channels through a Pareto Chart Methodology

Table 3

Summary of natural frequencies.

Base	95%	90%	75%	Description
12.4	12.4	12.4	12.4	Mode 1 wing bending
17.3	17.5	17.5	17.5	Tail torsion, antisymmetric wingtip bend
20.8	20.8	20.8	21.0	Wingtip, wing, tail, HS, VS torsion, and wingtip bend
26.7	26.0	26.0	25.9	Wing torsion, slight HS bend
28.9	28.2	28.1	28.1	Symmetric wing torsion
30.2	30.8	30.8	30.7	Antisymmetric wingtip bend, tail wag
33.8	36.5	36.1	—	HS, VS torsion
39.9	39.7	39.8	39.8	HS bend/torsion, mode 2 wing bend, and VS torsion
45.0	44.9	44.9	44.7	Mode 2 wing bend, HS bend/torsion, and VS torsion
51.4	51.0	51.7	50.6	Wing torsion, HS bend/torsion
63.7	61.1	62.9	64.1	Antisymmetric wing torsion, HS bend, and fuselage bend
72.3	73.3	72.0	71.9	Mode 2 wing bend/torsion opposite, HS torsion
74.4	75.9	75.9	75.8	HS torsion, mode 2 wing bend and torsion