초록 ▼

A flexibly-mounted active vibration absorber (AVA) which has a secondary controllable mass M.sub.3. If the passive resonance of mass M.sub.2 of the tuned absorber is insufficient to control the input vibration, a secondary mass M.sub.3 is vibrated at a frequency, amplitude and phase sufficient to ma

A flexibly-mounted active vibration absorber (AVA) which has a secondary controllable mass M.sub.3. If the passive resonance of mass M.sub.2 of the tuned absorber is insufficient to control the input vibration, a secondary mass M.sub.3 is vibrated at a frequency, amplitude and phase sufficient to make up the deficiency in mass M.sub.2. Many embodiments are described which depict variations on the first spring used for flexibly mounting the AVA, the actuators used to drive the AVA, and the attachment features for attaching to a vibrating member. Further in another aspect, means for counterbalancing the moments produced by the AVA are described.

대표청구항 ▼

[ What is claimed is:] [1.] An active system including an Active Vibration Absorber (AVA) for interconnection to a vibrating member to control a level of one from a group of vibration and noise at a predefined location by actuation of said AVA, said active system comprising:(a) a first spring K2 for

[ What is claimed is:] [1.] An active system including an Active Vibration Absorber (AVA) for interconnection to a vibrating member to control a level of one from a group of vibration and noise at a predefined location by actuation of said AVA, said active system comprising:(a) a first spring K2 for attaching to said vibrating member;(b) an AVA interconnected to, and flexibly suspended by said first spring K2 relative to said vibrating member, said first spring K2 shaping the output spectrum of said AVA, said AVA including:a first free-floating, tuned mass M2 attached to said first spring K2;ii) a second free-floating, tuned mass M3 adjacent said first free-floating mass M2;iii) a second spring K3 interconnected between said first free-floating mass M2 and said second free-floating mass M3; andiv) actuator means F operating between said first free-floating mass M2 and said second free-floating mass M3 and in parallel relationship to said second spring K3 to provide active real-time forces to actively oscillate said second free-floating mass M3 relative to said first free-floating mass M2; and(c) means for controlling said actuator means F to oscillate both said first free-floating mass M2 and said second free-floating mass M3 relative to said vibrating member at a frequency corresponding to a vibration frequency of said vibrating member causing said vibrating member to undergo a change in vibration thereby reducing one from the group consisting of said noise and said vibration at said predefined location.