Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Patent
1997-04-08
1999-09-07
Schwartz, Chris
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
26714015, 244 54, 248550, F16F 500
Patent
active
059474572
ABSTRACT:
A fluid-filled Active Vibration Absorber (AVA) (20) is described for attaching to, and controlling dynamic vibration of the member (22). The AVA (20) is comprised of primary tuning mass (23) preferably including an additional inertial tuning mass (26) which is associated with a primary resonant frequency (fn1), a flexible element (28) for interconnecting the primary mass (23) and, thus, interconnecting inertial tuning mass (26) to member (22), at least one, and preferably two, fluid chambers, (30) and (32), each having a defined volume stiffness Kv'1, Kv'2, a fluid (34) contained within the at least one and preferably two, fluid chambers, (30) and (32), a moveable piston (36) dynamically interacting with the fluid (34) in the at least one fluid chamber and preferably, in first and second fluid chambers, (30) and (32), to cause pressure variations which dynamically drive the primary tuning mass (23) within a range about the primary resonant frequency (fn1). Preferably, a coil (40) and magnet-and-pole assembly (38) driving the piston (36). The AVA (20) preferably includes a secondary resonance (fn2) which is tunable by adjusting the mass of the piston (36), volume stiffness Kv'1 of the first fluid chambers (30), and a piston area Ap1, amongst other parameters.
REFERENCES:
patent: 3085657 (1963-04-01), Preis
patent: 3230889 (1966-01-01), Brewer
patent: 3430902 (1969-03-01), Lohr
patent: 3490556 (1970-01-01), Bennett, Jr. et al.
patent: 3668939 (1972-06-01), Schrader
patent: 3917246 (1975-11-01), Gartner et al.
patent: 4356098 (1982-10-01), Chagnon
patent: 4685094 (1987-08-01), Vitringa et al.
patent: 4694650 (1987-09-01), Vincent
patent: 4715559 (1987-12-01), Fuller
patent: 4724923 (1988-02-01), Waterman
patent: 4760996 (1988-08-01), Davis
patent: 4811919 (1989-03-01), Jones
patent: 4935651 (1990-06-01), Hong et al.
patent: 5067684 (1991-11-01), Garnjost
patent: 5147573 (1992-09-01), Chagnon
patent: 5174552 (1992-12-01), Hodgson et al.
patent: 5231336 (1993-07-01), van Namen
patent: 5236186 (1993-08-01), Weltin et al.
patent: 5238232 (1993-08-01), Kobayashi et al.
patent: 5251863 (1993-10-01), Gossman et al.
patent: 5310137 (1994-05-01), Yoerkie, Jr. et al.
patent: 5323133 (1994-06-01), Heath et al.
patent: 5332061 (1994-07-01), Majeed et al.
patent: 5344128 (1994-09-01), Kobayashi et al.
patent: 5361878 (1994-11-01), Borsati
patent: 5427347 (1995-06-01), Swanson et al.
patent: 5427362 (1995-06-01), Schilling et al.
patent: 5439082 (1995-08-01), McKeown et al.
patent: 5452884 (1995-09-01), Gugsch et al.
patent: 5779231 (1998-07-01), Okazaki et al.
Todd A. Bevan and Ronald G. Hund, "Vibration Absorbers Quiet Propeller Noise", #931283 1993, Society of Automotive Engineers, Inc.
Waterman et al., "Fokker's Activities in Cabin Noise Control for Propeller Aircraft", SAE Technical Paper Series, #830736, Apr. 12-15, 1983.
Hagino et al., "Active Control for Body Vibration of F.W,D. Car", SAE Technical Paper Series, #860552, Feb. 24-28, 1986.
Cooney Kevin C.
Ivers Douglas E.
Jones Peter J.
Swanson Douglas A.
Lord Corporation
Schwartz Chris
Wayland Randall S.
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