# US 7,461,728 B2 · Active vibration damping system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,461,728 B2 - Document ID: US7461728B2 - Status: Granted - Kind: B2 - Application number: 11/069,711 - Filed: 2005-03-01 - Published: 2007-03-29 - Granted: 2008-12-09 - Earliest claimed: 2004-03-01 - Assignees: University of Vermont and State Agricultural College - Inventors: Dryver R. Huston; Brian Esser; James O. Plumpton - Web page: https://patentgrep.com/patent/US7461728B2 ## CPC - F16F 7/1005: {characterised by active control of the mass} - F16F 15/02: Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A system (100, 200, 300) for damping vibrations of a vibratory structure (104, 308). The damping system includes an active damper (112, 124, 128, 216), a vibration sensor (116, 208, 208A′-C′), and a controller (120, 212) for controlling the active damper in a manner that damps vibration of the vibratory structure. In some embodiments, the active damper comprises an active mass (132, 220, 220A′-C′, 220A″-C″) and an actuator (136) for controlling the movement of the active mass. In other embodiments, the active damper comprises a flexural damper (128). ## Claims ### Claim 1 An integrated active mass damping device for damping vibration of a vibratory structure, comprising: a) a body adapted for being attached to the vibratory structure; and b) a vibration sensor attached to said body and generating a first signal as a function of the vibration; and c) an active mass damper including an active mass and an actuator coupled between said active mass and said body for controlling movement of said active mass relative to said body, said actuator responsive to a second signal so as to dampen the vibration; wherein said body, said vibration sensor and said active mass damper are integrated on a unitary device that, when desired to be used to dampen vibrations of the vibratory structure, is secured to the vibratory structure via said body; wherein said unitary device further includes a controller operatively configured to generate said second signal as a function of said first signal; and wherein said controller includes a plurality of signal-processing techniques each for generating said second signal and is operatively configured to self-select one of said plurality of signal-processing techniques from among said plurality of signal-processing techniques based upon characteristics of at least one of the vibration and the vibratory structure. ### Claim 2 (depends on 1) An integrated active mass damping device according to claim 1, wherein said active mass damper includes a plurality of active masses and a corresponding plurality of actuators. ### Claim 3 (depends on 2) An integrated active mass damping device according to claim 2, wherein said plurality of active masses and said plurality of actuators are designed to operate in different ranges of a vibration along a single vibration axis. ### Claim 4 (depends on 2) An integrated active mass damping device according to claim 2, wherein said plurality of active masses and said plurality of actuators are designed to operate upon a corresponding respective number of vibrations along a corresponding respective number of vibration axes. ### Claim 5 (depends on 1) An integrated active mass damping device according to claim 1, wherein said vibration sensor and said controller are integrated onto said body. ### Claim 6 (depends on 5) An integrated active mass damping device according to claim 5, wherein said actuator is integrated onto said body. ### Claim 7 (depends on 1) An integrated active mass damping device according to claim 1, wherein said controller includes a learning-based active tuning system operatively configured for tuning said second signal, said learning-based active tuning system enabling said controller to learn what effect differing ones of said plurality of signal processing techniques have on the vibration when said differing ones are implemented a at differing times. ### Claim 8 (depends on 1) An integrated active mass damping device according to claim 1, wherein said active mass system is operatively configured to provide a tuned mass damper when said controller is not generating said second signal. ### Claim 9 (depends on 1) An integrated active mass damping device according to claim 1, comprising a plurality of active mass systems each tuned for damping vibrations in a corresponding range of vibration magnitudes, said controller operatively configured to permit selection from among said plurality of active mass systems. ### Claim 10 (depends on 1) An integrated active mass damping device according to claim 1, further including a power supply integrated onto said substrate and in electrical communication with said accelerometer, said controller and said actuator so as to provide electrical power thereto. ### Claim 11 (depends on 10) An integrated active mass damping device according to claim 10, wherein said power supply comprises a system for converting energy from the vibrations into electricity. ### Claim 12 (depends on 1) An integrated active mass damping device according to claim 1, wherein each of said body, said vibration sensor, said controller and said active mass damper are integrated into a single MEMS device. ### Claim 13 (depends on 1) An integrated active mass damping device according to claim 1, further comprising a communication system integrated aboard said substrate and in electrical communication with said controller, said communication system operatively configured for communicating with at least one external device. ### Claim 14 (depends on 13) An integrated active mass damping device according to claim 13, wherein said at least one external device is another integrated active mass damping device. ### Claim 15 (depends on 13) An integrated active mass damping device according to claim 13, wherein said at least one external device is a central controller. ### Claim 16 (depends on 1) An integrated active mass damping device according to claim 1, wherein said vibration sensor and said controller are integrated onto said body.