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1012results about "Rotating vibration suppression" patented technology

Hybrid vehicle drive for a motor vehicle

A hybrid vehicle drive for a motor vehicle includes an internal combustion engine and an electric machine which is selectively coupled with the internal combustion engine. The electric machine can be operated as a generator and as a motor. Regulation device which responds to a reference signal predetermined by a reference signal preset device are provided for the active damping of vibrations, especially torsional vibrations in the torque transmission path between the internal combustion engine and wheels of the motor vehicle driven by the latter. The regulation device also respond to sensing device which deliver an actual-value vibration signal containing vibration information about a rotating structural component of the motor vehicle and control the load torque exerted on the internal combustion engine by the electric machine for reducing or eliminating the vibrations of the structural component. An analysis device for determining a frequency spectrum of the actual-value vibration signal is associated with the regulation device. The reference signal preset device establishes a reference signal with predetermined frequency spectrum. The regulation device control the frequency spectrum of the load torque exerted on the internal combustion engine by the electric machine such that excessive spectral vibrations of the actual-value vibration signal are reduced or eliminated.
Owner:ZF FRIEDRICHSHAFEN AG

Assembly of pneumatic tire and rim, and a noise damper used therein

An assembly of a pneumatic tire and a rim includes a band-like noise damper, having the bottom surface fixed to a tire inner surface or a rim inner surface and the upper surface facing a tire inner space in the tire inner space, and extending in the tire circumferential direction. The noise damper is made of a sponge having a volume in the range of from 0.4 to 20% of the entire volume of the tire inner space. In a tire meridian section, the noise damper is of a laterally long, flat sectional shape having a maximum thickness value (tm) from the bottom surface to the upper surface in the range of from 5 to 45 mm and having a width (W1) of the bottom surface more than the maximum thickness value (tm). The upper surface extends along a wavy curve that is repetition of a wavy element in the width direction including a hill top portion having the maximum thickness value (tm), valley bottom portions on each side of the hill top portion having the minimum thickness value (ti) and slope portions extending down to the respective valley bottom portions from the hill top portion. Each end in the width direction of the upper surface is terminated at the valley bottom portions or the slope portions, but a thickness (te) from the upper surface to the bottom surface is in the range of from 1.0 to 15.0 mm.
Owner:SUMITOMO RUBBER IND LTD +1

Stayed cable vibration damper and design method for apparent mass rotating electromagnetic damper

ActiveCN107022955AAmplify the speedIncrease the equivalent damping coefficientRotating vibration suppressionFlywheelsDamping factorFundamental frequency
The invention belongs to the technical field of engineering structure control, and in particular relates to a stayed cable vibration damper and a design method for an apparent mass rotating electromagnetic damper. The stayed cable vibration damper comprises a damping device and a transmission mechanism, the transmission mechanism is used for connecting the stayed cable and the damping device, the design method comprises the steps that the fundamental frequency of the stayed cable is determined; the installation location of the apparent mass rotating electromagnetic damper is determined; the damping parameters of the apparent mass rotating electromagnetic damper is calculated; and the stiffness parameters of the apparent mass rotating electromagnetic damper is calculated. According to the stayed cable vibration damper and the design method for the apparent mass rotating electromagnetic damper, a ball screw is utilized to effectively improve the rotational speed of the rotating electromagnetic damper, the equivalent damping coefficient of the damper is improved, and the energy consumption efficiency of the electromagnetic damper is improved; and an inertia flywheel mounted on a rotating shaft of the electromagnetic damper generates an apparent mass effect, the apparent mass effect is amplified through a ball screw mechanism, the stayed cable vibration damping mechanism is provided passive negative stiffness control characteristics, and the vibration damping effect of the stayed cable is effectively improved.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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