Flutter exciter

Details Flutter exciter Flutter exciter

1987-07-16

1989-03-07

Woodiel, Donald O.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73147, 73671, G01H 100, G01M 900

Patent

active

048095532

ABSTRACT:
A flutter exciter induces vibration either for actual aircraft flight testing or for wind tunnel model testing. The basic flutter exciter unit is a pair of rotatable concentric cylinders mounted on either a fixed vane or an aircraft wing or a tail surface. Each cylinder has a slot which allows the air flow to pass therethrough. By rotating the cylinders together, oscillating air pressures are induced on the fixed vane or the aircraft surface to which the cylinders are attached. The cylinders may be mounted at a trailing edge of either the fixed vane or the aircraft wing, to any tail surface, or on any other lifting surfaces of the aircraft itself. Thus, because the flutter exciter can be made as a completely self-contained unit, it may be simply mounted to any suitable hard point on either the test model or the aircraft. The power required to rotate the slotted cylinders is minimal, thus allowing the use of a low wattage motor.

REFERENCES:
patent: 2950619 (1960-08-01), Schuerch
patent: 3113451 (1963-12-01), Beals, Jr. et al.
patent: 3552192 (1971-01-01), Grosser
patent: 3895515 (1975-07-01), Vetter et al.
patent: 4116056 (1988-09-01), Bulychev et al.
patent: 4350043 (1982-09-01), Jones
patent: 4475385 (1984-10-01), Farmer

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