Vehicle parameter calibration method

A technology of parameter calibration and complete vehicle, which is applied in the direction of vehicle testing, measuring devices, instruments, etc., can solve the problems of large consumption of manpower and material resources, large deviation between data and actual data, and the inability to rule out the interference of external conditions, etc., to achieve wide application, Improved precision and accuracy, with effects of stability and reliability

Active Publication Date: 2018-06-12
河南越博氢动力系统研究院有限公司
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Problems solved by technology

[0005] There are two traditional parameter calibration methods: one is to fit the vehicle resistance value curve through the sliding test to confirm the values ​​of a, b, and c, but this method cannot exclude the interference of external conditions, and the obtained data deviates greatly from the actual data ; The second is to measure through professional testing equipment in wind tunnels and hub test benches, but it consumes a lot of manpower and material resources

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Embodiment Construction

[0071] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Method of the present invention comprises the steps:

[0072] Step 1. Collection of vehicle data:

[0073] 11. The constant speed or sliding test of the vehicle, the tested vehicle is used for the constant speed test or sliding test. In the experiment, the CAN network analyzer can be used to collect the output torque value data T of the engine / generator through the vehicle CAN network, and the acceleration sensor can be used to Acceleration of the vehicle during the collection experiment

[0074] 12. Data preprocessing, the preliminary first-round processing of the collected data is carried out through the method of linear interpolation and low-pass filtering, and the fluctuation and interference in the collected data are filtered to eliminate the disturbance of the data signal, so that The data is smoothed, and the processed data and its sampling ti...

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Abstract

The invention discloses a vehicle parameter calibration method. The method includes the steps of 1, collecting vehicle data; 2, conducting vehicle dynamics formula calculation and curve fitting; 3, establishing a simulation vehicle model; 4, applying a batch processing program; 5, verifying vehicle parameters. The method has the advantages that through repeated verification calculation based on avehicle dynamics formula and software, the calculation result is obtained from actual experiments and can also be calibrated in an interference-free simulation environment, so that the parameter calibration result is more reliable; meanwhile, by using the batch processing program in combination with an optimization algorithm to assist in parameter selection, the calibration time can be greatly shortened, and the calibration accuracy can be improved.

Description

technical field [0001] The invention relates to a whole vehicle parameter calibration method, which belongs to the technical field of vehicle parameter calculation and vehicle dynamics simulation. Especially for the calibration and calculation method of vehicle parameters that are difficult to measure directly in actual experiments. Background technique [0002] At present, with the continuous development of China's domestic automobile industry, the level of China's independent research and development is also constantly improving. Vehicle simulation work is particularly important in vehicle development work, which runs through the entire process of vehicle research and development. Whether the parameters of the vehicle model Accurate, parameter matching is the basis of all simulation work, it often affects the final result of the simulation, thereby affecting the judgment of engineers on the state of the vehicle and the development of control strategies, such as drag coeffi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G05B17/02
CPCG01M17/007G05B17/02
Inventor 李占江高超蒋元广李麟朱震海
Owner 河南越博氢动力系统研究院有限公司
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