Mass absorber and detection method thereof

Abstract

The invention discloses a mass absorber and a detection method thereof, which realize the purpose of simply and safely attenuating the vibration and noise of a power assembly system. The mass absorber is directly arranged between a power assembly and a frame, a mass body is connected with a mass absorber cavity through a spring and a damper in the mass absorber cavity, the vibration of the power assembly system is attenuated by using the vibration of the mass body and the action of the damper, the mass absorber cavity can restrain the motion freedom except the motion freedom in the vertical direction, the vibration damping effect is greatly improved, and a feasible and thorough solution is provided for the vibration resistance and the durability of the traditional power assembly. The invention also provides a detection method of the mass absorber. A complete solution is provided for the detection of the mass absorber through calculation and simulation on properties of the power assembly.

Description

technical field [0001] The invention relates to the technical field of powertrain, in particular to a mass shock absorber and a detection method thereof. Background technique [0002] The powertrain is one of the main excitation sources of the automobile, and the vibration and noise generated by it are generally transmitted to the interior of the vehicle in two ways: one way is to attenuate the transmission to the frame through the powertrain mount, and then through the vehicle The frame is transmitted to the body, and through the resonance of the cavity in the car, the vibration and noise that the driver and passengers can perceive; another way is that the noise is directly transmitted to the car through the air. [0003] In order to reduce vibration and noise, according to the analysis of these two transmission paths, corresponding vibration reduction and noise reduction schemes can be adopted, that is, the optimization of vehicle structure design and the sealing or sound ...

AI Technical Summary

Problems solved by technology

[0005] This active mass damper is a flexible connection between the base and the mass body, and does not constrain the degrees of freedom in other directions, so the vibration damping effect will be weakened;

[0006] In addition, the core needs to be connected to an alternating current, and the DC power supply used in the car requires an inverter and other equipment to supply the alternating current, which increases the complexity of the system

[0007] Although this kind of mass shock absorber can realize "active vibration", due to the electromagnetic interference in the electronic / electrical system of the vehicle, it affects the magnetic field distribution of the magnet, and then interferes with its vibration isolation effect, resulting in poor stability, and there may be some security risks

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