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Method for initial estimating car performance by computer assisting

A computer-aided, automotive technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as difficulty in evaluating vehicle performance well, no preliminary estimation of vehicle performance, etc., to achieve the effect of improving efficiency and quality

Inactive Publication Date: 2006-06-14
WANXIANGQIANCHAO CO LTD
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AI Technical Summary

Problems solved by technology

However, there is no special invention for the preliminary estimation of vehicle performance in the market, and the algorithm used is difficult to evaluate the performance of the vehicle well.

Method used

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  • Method for initial estimating car performance by computer assisting
  • Method for initial estimating car performance by computer assisting
  • Method for initial estimating car performance by computer assisting

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawings and examples. This computer-aided automobile performance preliminary estimation method of the present invention mainly comprises automobile handling stability calculation, and its steps are as follows:

[0036] In the present invention, the content of handling stability calculation is as follows: (1) transient response: the vehicle yaw angular velocity transient response curve under the angular step input; include the following indicators: natural circular frequency; damping ratio; response time; peak response time; (2) Steady-state response: steady-state yaw rate gain curve (steering sensitivity); the difference between the absolute value of the front and rear wheel slip angles-lateral acceleration curve; the ratio of steering radius-speed square curve; including the following indicators: stability factor; Static reserve factor; turning to conclusions.

[0037] First create...

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Abstract

The invention mainly relates to an automobile performance computer-aided primary estimating method, mainly comprising the calculation of automobile control stability and its concrete steps are as follows: firstly establishing a movement model, taking a set of relative reference frame fixed on the automobile, taking the intersection of the center-of-gravity plumb line and side inclined axis of the whole automobile as an origin, using a lengthways horizontal axis of the automobile as an X-axis, using a line vertical to the X-axis and passing through the origin as a Y-axis, and using a plumb axis through the origin as a Z-axis, assuming all the angles on the horizontal plane as well as the corresponding angular speeds and angular accelerations are positive, counter-clockwise; obtaining a Z-axis moment balance equation, a Y-axis force balance equation, a Y-axis moment balance equation, and a main pin-axis moment balance equation. The beneficial effects of the invention comprise effectively forecasting the performance of the automobile products, largely reducing the trial-manufacturing and testing time and expenses and improving the efficiency and quality of automobile design.

Description

Technical field [0001] The invention relates to a computer-aided field, and mainly relates to a computer-aided preliminary estimation method for vehicle performance using computer simulation and optimization algorithms. Background technique [0002] To evaluate the performance of a car, it should be measured in terms of power, fuel economy, braking, handling stability and ride comfort. After completing the selection design of the car chassis, it is necessary to check the basic performance of the car to determine whether the result of the selection design meets the basic performance requirements. With the widespread application of computers, automobile design is transforming from manual design to computer-optimized design, integrating design and production. However, there is no special invention aimed at the preliminary estimation of vehicle performance in the market at present, and the adopted algorithm is also difficult to evaluate the performance of the vehicle well. Co...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 黄建根宁连利
Owner WANXIANGQIANCHAO CO LTD
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