Automatic calibration method for one-dimensional automobile thermal management model

A calibration method and thermal management technology, applied in the field of automatic calibration of one-dimensional automotive thermal management models, can solve the problems of poor adaptability, time-consuming manual calibration work, high error rate, etc., to reduce the burden, shorten the working cycle, and improve the scope of application Effect

Active Publication Date: 2020-05-08
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of time-consuming manual calibration work, high error rate, and poor adaptability, the present invention provides an automatic calibration method for a one-dimensional automobile thermal management model

Method used

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  • Automatic calibration method for one-dimensional automobile thermal management model
  • Automatic calibration method for one-dimensional automobile thermal management model
  • Automatic calibration method for one-dimensional automobile thermal management model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1 (eg figure 2 shown)

[0061] Build the equivalent model of the air flow of the front-end module, where 1 and 2 represent the pressure increase coefficients of the front end of the upper and lower grilles respectively, 3, 4 and 5 represent the resistance coefficients of the upper and lower grilles and the engine compartment respectively, 6 and 7 are radiators, and 8 is the fan. The calibration requirement is to make the air volume of each radiator consistent with the test results at all vehicle speeds by adjusting the pressure increase coefficients and drag coefficients.

[0062] During calibration, the calibration parameters are the coefficients of 1~5 in the model, the initial value is 1, the constraint conditions are all greater than or equal to 0, the boundary parameter is the front wind speed, the calibration target is the air volume of the two radiators of 6 and 7, and the calibration value is For the air flow measurement results of the wind tunnel tes...

Embodiment 2

[0064] Example 2 (eg Figure 4 shown)

[0065] Build the equivalent model of passenger compartment heating, where A represents the engine and B represents the heater core. The calibration requirement is to fit the relevant thermal property parameters of the engine through two sets of test water temperatures with different boundaries. Two sets of trial boundaries are stored in the model in a table format, switched by trial number.

[0066] During calibration, the calibration parameters are the heat coefficient, heat capacity, convective heat transfer coefficient with the coolant, and convective heat transfer coefficient with the environment of the engine A. The constraint conditions are all greater than 0, the boundary parameters are the simulation time, the test number, and the calibration target is heating The water temperature at the inlet of core body B, the calibration value is two Excel file names, which store the inlet water temperature results of the two tests respect...

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Abstract

The invention relates to an automatic calibration method for a one-dimensional automobile thermal management model, which needs to establish a one-dimensional finished automobile or system-level simulation model, and parameters to be determined are calibration parameters and initial values, boundary parameters, a calibration target, a calibration mode, a calibration value, an error calculation method and a calibration algorithm. An engineer inputs all relevant parameters into the computer, and finally, the optimization module judges whether the relevant parameters reach a stop standard or notthrough the interaction module and the error calculation module, and outputs an optimal result. According to the invention, the problems in the current model calibration work can be effectively solved, the whole calibration process is automatically completed by a computer, and the burden of engineers is reduced; the automatic calibration speed is hundreds of times that of manual calibration, and the working period is shortened; the calibration precision is higher than that of manual calibration; in addition, the application range of the model can be expanded.

Description

technical field [0001] The invention belongs to the technical field of automobiles and relates to an automatic calibration method for a one-dimensional automobile thermal management model. Background technique [0002] During vehicle development, 1D thermal management simulation is the only analytical tool that can predict thermal performance at the vehicle or system level. During the modeling process, it is necessary to calibrate the subsystems and components in the vehicle or system model based on the existing test results to ensure the reliability of the model. Among them, calibration refers to the calibration of model parameters based on test data until the accuracy of the results meets the requirements. [0003] In the prior art, the calibration tools provided by one-dimensional simulation software are only applicable to steady-state, single calibration parameter, and unconstrained models. At present, most application scenarios do not meet the above conditions, so man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/15
CPCY02T10/40
Inventor 项阳雍安姣高月仙王银慈叶坚
Owner CHERY AUTOMOBILE CO LTD
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