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公开(公告)号：JPH11236945A
公开(公告)日：1999-08-31
申请号：JP34964298
申请日：1998-12-09
Applicant: APPLIED POWER INC
Inventor： BAILEY DONALD C , PARK CHAN , VON FLOTOW ANDREAS H , JENSEN WILLIAM
Abstract: PROBLEM TO BE SOLVED: To provide a vibration absorber capable of changing the resonance frequency thereof by following a change of the vibration frequency to be generated with a change of the engine speed of aircraft. SOLUTION: In a vibration lower device having a mount 4o to be fitted to a vibrator such as an airframe of air plane, a plate 28 is separated from the mount 40 by a block 54. A first elastic link 60 is compressed between the block body 54 and the mount 40. A second link 62 is compressed between the block body 54 and the plate 28. The link 62 works as a spring having rigidity for determining the resonance I frequency for vibrating the block body 54. Vibration of the vibrator is absorbed by the movement of the block body 54 for absorbing the vibration energy, and the absorption of the vibration energy becomes the minimum when the block body 54 resonates at the vibration frequency. A controller senses vibration of the vibrator, and operates a mechanism for changing a space between the mount 40 and the plate 28 so as to adjust the rigidity of the spring. Rigidity of the spring is changed till the resonance frequency of the block body 54 is adjusted at the vibration frequency of the vibrator.
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公开(公告)号：BR9805250A
公开(公告)日：1999-11-09
申请号：BR9805250
申请日：1998-12-08
Applicant: APPLIED POWER INC
Inventor： BAILEY DONALD C , PARK CHAN , FLOTOW ANDREAS H VON , JENSEN WILLIAM
Abstract: A vibration absorber (10) has a mount (40) for attaching to a vibrating body, such as the frame of an aircraft. A plate (28)is spaced from the mount (40) with a mass (52) there between. A first elastomeric ring (60) is compressed between the mass (52) and the mount (40), and a second elastomeric ring (62) is compressed between the mass (52) and the plate (28). The rings act as a spring having a stiffness that defines a resonant frequency at which the mass oscillates. Vibration in the body is reduced by the mass movement absorbing vibrational energy and the energy absorption is maximized when the mass resonates at the vibration frequency. A controller (80) senses body vibration and operates a mechanism that alters the spacing between the mount and the plate thereby adjusting the spring stiffness. The stiffness of the spring is changed until the resonant frequency of the mass is tuned to the vibration frequency of the body.
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公开(公告)号：CA2255228C
公开(公告)日：2003-06-03
申请号：CA2255228
申请日：1998-12-08
Applicant: APPLIED POWER INC
Inventor： JENSEN WILLIAM , VON FLOTOW ANDREAS H , BAILEY DONALD C , PARK CHAN
Abstract: An apparatus for reducing vibration has a mount for attaching to a vibrating body, such as the frame of an aircraft. A plate is spaced from the mount with a mass there between. A first elastomeric ring is compressed between the mass and the mount, and a second elastomeric ring is compressed between the mass and the plate. The rings act as a spring having a stiffness that defines a resonant frequency at which the mass oscillates. Vibration in the body is reduced by the mass movement absorbing vibrational energy and the energy absorption is maximized when the mass resonates at the vibration frequency. A controller senses body vibration and operates a mechanism that alters the spacing between the mount and the plate thereby adjusting the spring stiffness. The stiffness of the spring is changed until the resonant frequency of the mass is tuned to the vibration frequency of the body.
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公开(公告)号：CA2255228A1
公开(公告)日：1999-06-09
申请号：CA2255228
申请日：1998-12-08
Applicant: APPLIED POWER INC
Inventor： VON FLOTOW ANDREAS H , JENSEN WILLIAM , BAILEY DONALD C , PARK CHAN
Abstract: An apparatus for reducing vibration has a mount for attaching to a vibrating body, such as the frame of an aircraft. A plate is spaced from the mount with a mass there between. A first elastomeric ring is compressed between the mass and the mount, and a second elastomeric ring is compressed between the mass and the plate. The rings act as a spring having a stiffness that defines a resonant frequency at which the mass oscillates. Vibration in the body is reduced by the mass movement absorbing vibrational energy and the energy absorption is maximized when the mass resonates at the vibration frequency. A controller senses body vibration and operates a mechanism that alters the spacing between the mount and the plate thereby adjusting the spring stiffness. The stiffness of the spring is changed until the resonant frequency of the mass is tuned to the vibration frequency of the body.
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