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Vehicle driving deviation active control method

An active control, vehicle driving technology, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve problems such as time-consuming inspection and rectification, increase in cost, and inability to completely prevent deviations, and achieve shortened The effect of development cycle, reduction of research and development costs, reduction of deviation problems and frequency of rectification

Pending Publication Date: 2020-10-09
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology

This method will cause two problems: one is that the deviation cannot be completely prevented; the other is that the uniform deviation control is adopted, resulting in an increase in cost
Usually repeated troubleshooting and rectification takes more than 1 month

Method used

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  • Vehicle driving deviation active control method
  • Vehicle driving deviation active control method
  • Vehicle driving deviation active control method

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with accompanying drawing.

[0054] In this embodiment, an active control method for vehicle deviation, including the following steps:

[0055] Step 1. Use multi-body computing software to establish a virtual prototype of the vehicle that reflects the vehicle deviation mechanism, and calibrate the accuracy of the model through the simulation of the vehicle;

[0056] Step 2. Parameterize the suspension parameters, based on DOE sampling, identify the fluctuation of the deviation performance under the deviation of the suspension parameters, and screen out the key parameters that affect the deviation of the driving;

[0057] Step 3. Construct the approximate model of deviation key parameters and deviation performance by radial basis neural network method;

[0058] Step 4. According to the Monte Carlo method, the reliability of deviation performance is judged when the critical parameters fluctuate (that is...

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Abstract

The invention discloses a vehicle driving deviation active control method, which comprises the following steps of: 1, establishing a whole vehicle virtual prototype for reflecting a vehicle deviationmechanism by utilizing multi-body calculation software, and calibrating model precision through a whole vehicle simulation working condition; 2, parameterizing the suspension parameters, identifying the fluctuation condition of the deviation performance under the deviation of the suspension parameters based on DOE sampling, and screening out the off-weight parameters influencing the driving deviation; 3, constructing an approximate model of the deviation weight parameter and the deviation performance through a radial basis function neural network method; 4, judging the reliability of the deviation performance according to a Monte Carlo method when the threshold weight parameter fluctuates; 5, combining the deviation control scheme of each parameter in combination with production conditionsand cost, analyzing the failure probability of deviation control and the Sigma level, and determining the control scheme of parameter deviation; and 6, randomly combining the limit deviations of theparameters, and verifying whether the running deviation quantity meets a performance target or not through a virtual prototype of the whole vehicle. According to the invention, the deviation risk canbe effectively avoided in the earlier stage.

Description

technical field [0001] The invention belongs to the technical field of automobile active control, and in particular relates to an active control method for vehicle deviation. Background technique [0002] Vehicle deviation means that when the car has no steering input at all, the vehicle cannot guarantee to drive in a straight line and gradually deviates to one side. Vehicle deviation is divided into uniform speed deviation, braking deviation and acceleration deviation according to the mechanism. Deviation will increase the driver's steering force, forcing the driver to constantly correct the direction of the vehicle through the steering wheel, which will aggravate driver fatigue. If the deviation is serious, it is very likely to cause a traffic accident. [0003] As a typical long-standing problem in the automotive industry, vehicle deviation is closely related to the design level and control ability of the OEM. Through the statistical analysis of deviation, it is found ...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F30/15
CPCG06F30/27G06F30/15
Inventor 王俊翔陈华王金龙成健
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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