Vibration exciter for NVH (Noise Vibration and Harshness) test and application method thereof

A vibration exciter and excitation technology, applied in the field of NVH testing, can solve the problems of complex operation, low vibration exciter spring stiffness, high equipment requirements, etc., and achieve the effect of flexible and convenient operation, low production cost and high work efficiency

Inactive Publication Date: 2012-05-09
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the spring stiffness of the exciter is generally low, it is necessary to keep an appropriate distance from the excited part. If the distance is too small or too large, the excitation effect will be affected.
In the case of the narrow space of the vehicle, it is difficult to paste the force sensor on the excited part
And when the excited object is not horizontal, an inclined platform is required, the operation is complicated, and the equipment requirements are high

Method used

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  • Vibration exciter for NVH (Noise Vibration and Harshness) test and application method thereof
  • Vibration exciter for NVH (Noise Vibration and Harshness) test and application method thereof

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Embodiment Construction

[0016] Such as figure 1 As shown, the present invention is that the vibrator body 3 is connected to the vibrating head 1 through the force sensor 2, so that the vibrator body 3 vibrates the excited parts through the vibrating head 1, reducing the distance between the vibrator and the excited parts. distance requirements.

[0017] The excitation head 1 is a conical structure with a thin cylindrical head and a conical bottom, which can prevent uneven force on the contact surface when contacting the excited part, and can increase the friction with the excited part. Prevents slipping during vibration. Both ends of the force sensor 2 are provided with threaded holes, which are respectively connected to the exciter body 3 and the exciter head. The exciter body 3 reduces the amplitude of the exciter by increasing the spring stiffness of the exciter body 3, so that the exciter head 1 installed on the exciter can directly contact the excited part to vibrate.

[0018] The vibrator of...

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Abstract

The invention discloses a vibration exciter for NVH (Noise Vibration and Harshness) test and an application method thereof. In the vibration exciter, a vibration exciter body is connected with a vibration exciting head through a force transducer. Due to the adoption of the method and a structure, the vibration exciter and the application method have the advantages that: 1, the vibration exciter does not have any strict distance requirement on an excited part, can be applied to a non-horizontal plane, and is flexible and convenient for operating; 2, the force transducer is not required to be stuck to the excited part, the vibration exciter can be positioned without a worktable, and high working efficiency is realized; and 3, the structure is simple, and production cost is low.

Description

[0001] Involved areas [0002] The invention relates to NVH testing of automobiles, in particular to an exciter used in NVH testing and a using method thereof. Background technique [0003] NVH is a modeling analysis for a certain system or assembly of a car, to find out the factors that have the greatest impact on ride comfort, and to improve ride comfort by improving the vibration of the excitation source or controlling the transmission of the vibration and noise of the excitation source to the cabin sex. The study of NVH characteristics is not only applicable to the development process of new automobile products, but also to the study of improving the ride comfort of existing models. [0004] NVH performance includes noise, vibration, comfort, etc. When analyzing the transmission path of vibration and noise transmitted by the structure on the vehicle, the exciter is required as the excitation source. The traditional vibrator is generally placed on the workbench, the force...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 陈晋阁常辉邓晓龙
Owner CHERY AUTOMOBILE CO LTD
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