Urban ramp driving condition construction method and application

Abstract

The invention discloses an urban ramp driving condition construction method and application. The method comprises the steps: firstly, selecting an urban road containing a ramp as a test route and acquiring speed and slope angle information on the test route; preprocessing the acquired data to obtain effective data, then performing short-stroke division and principal component analysis according tothe effective data, performing short-stroke clustering analysis by adopting an SOM neural network according to a principal component analysis result, screening short strokes according to a clusteringanalysis result, and finally combining the selected short strokes to form an urban ramp driving condition meeting requirements. The related parameters of the ramp are listed into the short-stroke characteristic parameters, and the urban ramp information is contained in the constructed driving working condition so that the constructed driving working condition contains urban ramp driving characteristics and can meet the requirements of an automobile urban ramp driving performance test and can be used as a reference working condition of the automobile urban ramp driving performance test in an automobile bench performance experiment and a performance simulation experiment.

Description

technical field [0001] The invention belongs to the field of construction of urban standard driving conditions, and relates to the construction of urban driving conditions with ramp information and the application of the constructed urban ramp driving conditions. Background technique [0002] Vehicle driving conditions generally refer to the speed-time curve when the vehicle is driving in a specific traffic environment (such as expressway, urban road, etc.), and are mainly used to test vehicle energy consumption / fuel consumption, emissions, etc. in the development and evaluation of new automotive technologies Performance indicators are a common core technology in the automotive industry. [0003] The three typical operating conditions systems widely used in automobile energy consumption / fuel consumption and emission testing worldwide are American driving conditions, Japanese driving conditions and European driving conditions. There are many types of driving conditions in th...

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Problems solved by technology

[0005] It can be seen from the above that there are currently existing vehicle driving conditions for different test purposes, usually based on speed-time curves, which do not take into account the factors of urban ramps, and are not available for testing vehicle energy consumption / fuel consumption, Urban ramp driving conditions of performance indicators such as emissions cannot reflect the characteristics of urban ramp driving, and cannot be used to test the performance of cars driving on urban ramps

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