ACTIVE VIBRATION CONTROL DEVICE FOR VEHICLE

• Main Authors: SANO HISASHI, SAWADA HIDEJI
• Format: Patent
• Language: English
• Published: 22.01.1993
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PERFORMING OPERATIONS; PHYSICS; SOUND-PRODUCING DEVICES; STEAM ENGINES; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WEAPONS

PURPOSE:To prevent the noise effect and improve the vibration suppressing effect by arranging the second sensor and an A/D unit close to the ceiling wall of a vehicle cabin, arranging a control unit in the vehicle cabin or 2 trunk room, and achieving multiplex transmission of the data between the A10 unit and the control unit through an optical fiber. CONSTITUTION:The canceling vibration of actuators 41-4m is detected by error sensors 51-5n, and received by a control unit 20. The inverse transmission characteristics are changed so that the error may be minimized according to the error signals from the error sensors 51-5n, the vibration transmission characteristics between the actuators 41-4n and the error sensors 51-5n and the detected signals of the first sensor. The error signals detected by the error sensors 51-5n through the optical fiber 61 are transmitted as the optical multiplex signal from an A/D unit 10 to the control unit 20, and the driving signal of the actuators 41-4m is outputted as the optical multiplex signal from the control unit 20 to a D/A unit 30.