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Robustness prediction and optimization method of steering wheel vibration caused by automobile cooling module

A cooling module and vehicle cooling technology, applied in robustness estimation and optimization, in the field of steering wheel shaking caused by automotive cooling module, which can solve the problem of inability to take into account the fluctuation of fan rotor imbalance, vibration isolation pad stiffness fluctuation and manufacturing tolerances, and the inability to obtain steering wheel acceleration. Response and other issues to achieve the effect of improving NVH performance experience, shortening R&D cycle, and high efficiency

Active Publication Date: 2020-04-07
CHONGQING CHANGAN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

[0005] (b) This method evaluates the sensitivity, and cannot obtain the acceleration response of the steering wheel under actual excitation;
[0006] (c) This method cannot take into account uncertain factors such as fluctuations in fan rotor unbalance, fluctuations in the stiffness of vibration isolation pads, and manufacturing tolerances

Method used

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  • Robustness prediction and optimization method of steering wheel vibration caused by automobile cooling module

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing.

[0038] like figure 1 The robustness estimation and optimization method of the steering wheel vibration caused by the automobile cooling module includes the following steps:

[0039] A. Problem identification and P-diagram analysis

[0040] Problem identification: According to customer feedback and experimental test data, it is analyzed that the cooling module fan rotation is the main cause of excessive steering wheel vibration.

[0041] P-diagram analysis: P-diagram analysis is performed on the steering wheel vibration caused by the fan rotation of the cooling module, and the three input states and two output states of the problem are determined, and the relevant parameters of the steering wheel vibration caused by the cooling module are obtained. The three input states are respectively are the input signal, control factor and noise factor, and the two output states are i...

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Abstract

The invention provides a robustness pre-estimation and optimization method for steering wheel shaking caused by an automobile cooling module. The method comprises the steps of: A, problem identification and P graph analysis; B, DOE analysis; C, approximation model building and precision verification; D, Monte Carlo analysis; E, 6 Sigma robustness analysis; F, 6 Sigma robustness design optimization; G, focus area Monte Carlo analysis; H, optimization plan test verification. The method can estimate the NVH performance of a cooling module more accurately and find out optimization plans capable of meeting 6 Sigma quality control requirements.

Description

technical field [0001] The invention belongs to the technical field of automobile NVH, and in particular relates to a robustness estimation and optimization method for steering wheel vibration caused by an automobile cooling module. Background technique [0002] The automotive cooling module includes a condenser, radiator, fan and intercooler, which perform heat exchange on the air conditioning system, engine, gearbox and intake system respectively. The cooling module is installed on the front-end module of the engine room through four vibration isolation pads. Due to the existence of fan rotor unbalance, the cooling module system is periodically excited by the rotation of the fan, and the vibration passes through the cooling module system, vibration isolation pads, front-end modules, longitudinal beams, The front panel, side wall, floor and other paths are transmitted to the steering wheel, and the vibration level of the steering wheel is often used as an important indicato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/15G06F111/06G06F119/18
CPCG06F30/15G06F30/23G06F2111/06G06F2119/18Y02T90/00
Inventor 刘林许春铁张松波冯秋翰
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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