science-review.ru
Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440
ISSN 2500-0799
ПИ №ФС77-57440
INVESTIGATION OF METHODS TO ASSESS THE CONDITIONS OF THE FLOW OF VEHICLES, TAKING INTO ACCOUNT CROSS-COUNTRY
162 KB
The article shows that, in assessing the dynamic fluidity of the vehicle is taken into account only the magnitude of change of speed when driving through the test section of the road. This is sufficient for evaluation of roads in a flat area where road conditions affecting the change in the driving mode, located at a considerable distance from each other. To estimate the slopes of roads in difficult terrain conditions, where the effect of changing parameters on the mode of movement of interpenetrating, you must also take into account the rate of change of speed. Scatter in the values of negative acceleration indicates that different parts of the roads are characterized by the same values of the safety factor, there are various traffic conditions and, accordingly, depending on their fluidity of movement is different. Under these conditions, the authors propose the use of indicators that reflect the car response to changing traffic conditions into account while the magnitude, intensity and frequency of change of speed. To confirm these theoretical assumptions, we compared the parameters: the spread speed and acceleration of the spread based on the analysis of data obtained during field observations on sections of roads in difficult conditions. It is proved that among a group of indicators that may be used to evaluate the dynamic smooth track, it reflects the fluidity and sensitive to both the magnitude of change of speed, and its frequency characteristic of the roads in rough terrain are indicators based on the use of the standard deviation of acceleration .