Method for analyzing driving safety of vehicles

A technology of safety analysis and vehicle driving, applied in the field of road safety analysis and safety analysis of traffic vehicles, it can solve problems such as blocking, sideslip, and inability to give numerical dynamic simulation results, and achieve the effect of judgment.

Inactive Publication Date: 2010-06-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

(2) Overloading will cause the steering gear of the vehicle to be unable to turn lightly and flexibly, and phenomena such as sideslip, lightness, shimmy, jitter, and blockage will occur
(3) Overloading often causes the center of gravity of the car to be too high, and the axle load transfer is too large when driving, which causes the driving stability and handling stability of the car to deteriorate, and the critical speed drops when turning sharply
This method is mainly based on theoretical analysis, an

Method used

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  • Method for analyzing driving safety of vehicles
  • Method for analyzing driving safety of vehicles
  • Method for analyzing driving safety of vehicles

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Embodiment Construction

[0031] refer to Figure 1~3 .

[0032] Firstly, combining the vehicle dynamics equation and its kinematics equation, a standard loaded vehicle model under general conditions is established. The vehicle longitudinal dynamics model includes five parts: engine model, torque converter model, automatic transmission model, vehicle drive model and brake system model. These four parts are modeled separately, and the longitudinal dynamic model of the vehicle can be obtained by synthesis. Further establish the ground three-dimensional coordinate system (see image 3 ), combined with the longitudinal dynamics model, the kinematics equation of the vehicle can be written, so as to obtain the standard loaded vehicle motion model:

[0033] V · = - γ rM V 2 + ...

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Abstract

The invention discloses a method for analyzing driving safety of vehicles, belongs to the technical field of driving safety of vehicles, and analyzes the driving safety of different vehicles on road sections in mountainous area or on a bridge, and the like. The method for analyzing driving safety of vehicles of the invention comprises the following steps of: establishing a longitudinal kinetic model of a vehicle by establishing an engine model, a hydraulic torque converter model, an automatic transmission model, a vehicle driving model and a brake system model respectively and combining the models; building a standard loading vehicle movement model in a common state by combining a vehicle kinetic equation, modifying movement models of light loaded, heavy loaded and overloaded vehicles based on the standard loading vehicle movement model in a common state, and analyzing a corresponding motion law. The method realizes the judgment of the driving safety of vehicles on specific road section by establishing the kinetic models of the vehicles, acquiring driving data of vehicles, verifying and modifying the models by designed tests.

Description

technical field [0001] The invention relates to a safety analysis method, in particular to a traffic vehicle road safety analysis method, belonging to the technical field of road traffic vehicle safety. Background technique [0002] In terms of driving safety analysis, research at home and abroad mainly starts from the driver's visual characteristics of the movement, the driver's emotional state, road conditions, the rationality of traffic safety facilities, and the rules and regulations. Overloading affects driving safety. Among them, the impact of braking performance on driving safety is mainly aimed at the two situations of non-assisted braking and water-cooled auxiliary braking of vehicles under standard loading, through the temperature change of the brake hub after long-term braking and the corresponding driving distance. The relationship curve was analyzed to carry out the research. In the aspect of analyzing the impact of overload on driving safety, it is qualitativ...

Claims

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Application Information

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IPC IPC(8): G08G1/00G08G1/01G06F19/00
Inventor 史忠科杨隽楠
Owner NORTHWESTERN POLYTECHNICAL UNIV
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