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Drop test dual-four-degree-of-freedom half vehicle model-based vehicle parameter identification method

An identification method and vehicle parameter technology, applied in the field of vehicle parameter identification, can solve problems such as expensive equipment

Active Publication Date: 2013-05-01
常州万安汽车部件科技有限公司
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Problems solved by technology

[0003] In the frequency domain method, a four-channel suspension test bench is needed to excite the car, but the equipment of the four-channel suspension test bench is relatively expensive, and general enterprises and research institutes do not have a four-channel suspension test bench

Method used

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  • Drop test dual-four-degree-of-freedom half vehicle model-based vehicle parameter identification method
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  • Drop test dual-four-degree-of-freedom half vehicle model-based vehicle parameter identification method

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0044] see figure 1 , the embodiment of the present invention includes:

[0045] A vehicle parameter identification method based on a drop test double-4 degrees of freedom half-vehicle model, comprising the following steps:

[0046] 1) Set at least 6 measuring points on the vehicle, the first measuring point and the second measuring point are respectively set at the maximum distance from both sides of the body center of mass, and the third measuring point is set at the distance between the longitudinal centerline of the body and the front axle of the body At the intersection point, the fourth measuring point is set at the tail of the longitudina...

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Abstract

The invention discloses a drop test dual-four-degree-of-freedom half vehicle model-based vehicle parameter identification method, which comprises the following steps of: setting at least six measurement points on a vehicle; obtaining an acceleration signal of each measurement point by using a plurality of drop tests; identifying modal parameters of the vehicle by using a state variable time-domain identification method and the obtained acceleration signals; identifying physical parameters, wherein the physical parameters comprise a mass parameter, a stiffness parameter, a damping parameter and a dimension parameter; correcting the parameters; and if correction errors are greater than standards, starting re-identifying the physical parameters from the step 4, and if the errors are less than or equal to the standards, finishing parameter identification. In such a way, a test method is simple, special requirements on test equipment are avoided, the estimated physical parameters are accurate, and simulation responses given by the estimated physical parameters are matched with responses obtained by the tests.

Description

technical field [0001] The invention relates to the field of vehicle parameter identification, in particular to a vehicle parameter identification method based on a drop test double-4-degree-of-freedom half-vehicle model. Background technique [0002] For the study of the dynamic characteristics of the car, it is necessary to establish an accurate car model, so determining the physical parameters of the car plays a vital role in the study of its dynamic characteristics. The identification of vehicle modal parameters can be obtained by frequency domain method or time domain method. [0003] In the frequency domain method, a four-channel suspension test bench is needed to excite the automobile, but the equipment of the four-channel suspension test bench is relatively expensive, and general enterprises and research institutes do not have a four-channel suspension test bench. Contents of the invention [0004] The technical problem mainly solved by the present invention is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/08G01M17/007
Inventor 王立夫张农
Owner 常州万安汽车部件科技有限公司
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