Method for analyzing driving safety of vehicles

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...

AI Technical Summary

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, and only considers the influence of the maneuverability of the vehicle itself on the driving safety of the vehicle, and does not consider the driving safety of the vehicle under different road conditions; nor does it conduct specific experiments to analyze and judge the effectiveness of the model; Analyze the specific driving state data (driving speed, center of gravity change, steering gear angle, etc.) of the vehicle when it is overweight, but cannot give specific numerical dynamic simulation results

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