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Method and system for determining stable region of vehicle phase plane

A stable area and phase plane technology, applied in geometric CAD, design optimization/simulation, calculation, etc., can solve the problems of inaccurate division of vehicle phase plane stable area, large error in vehicle stability judgment, etc., to reduce the unstable area , The judgment of vehicle stability is accurate and the effect of accurate judgment

Active Publication Date: 2020-05-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and system for determining the stable area of ​​the vehicle phase plane to solve the problem in the prior art that the division of the stable area of ​​the vehicle phase plane is not accurate, resulting in large errors in vehicle stability judgment

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  • Method and system for determining stable region of vehicle phase plane
  • Method and system for determining stable region of vehicle phase plane
  • Method and system for determining stable region of vehicle phase plane

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[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0065] The purpose of the present invention is to provide a method and system for determining the stable region of the phase plane of the vehicle, which can improve the accuracy of the division of the stable region of the phase plane of the vehicle, so as to determine whether the vehicle is in a stable state more accurately.

[0066] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention w...

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Abstract

The invention discloses a vehicle phase plane stable region determination method and system. The determination method comprises the steps of obtaining vehicle parameters; according to the vehicle parameters, building a nonlinear tire model by utilizing a Dugoff tire formula; according to the nonlinear tire model, determining a vehicle tire lateral force; obtaining a current wheel steering angle; and according to the wheel steering angle, determining a vehicle phase plane stable region of side slip angle velocity-side slip angle phase diagram by utilizing the nonlinear tire model and a linear vehicle model, wherein the phase plane stable region comprises a closed quadrangle and a closed triangle. According to the determination method and system provided by the invention, the vehicle phase plane stable region can be accurately divided, so that the vehicle stability judgment precision is improved.

Description

technical field [0001] The invention relates to the field of vehicle stability determination, in particular to a method and system for determining a stable area of ​​a vehicle phase plane. Background technique [0002] With the development of technology, people have higher and higher requirements for the safety of vehicles, and many technologies are used to improve the safety and stability of vehicles. However, since the vehicle is a nonlinear system, it is difficult to determine whether the driving vehicle is still in a stable state, that is, it cannot be determined whether the vehicle can return to the corresponding stable point by itself, and the corresponding stability and safety controls are also difficult to implement. [0003] For the judgment of the stability region of the vehicle phase plane, the phase plane method is very important for the stability judgment of the nonlinear vehicle system. The phase plane method can analyze the stability of the nonlinear system, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15
CPCG06F30/15G06F30/20G06F2119/06
Inventor 王震坡张雷余文
Owner BEIJING INSTITUTE OF TECHNOLOGYGY