Research On Reliability Evaluation Method Of Autonomous Bus Demonstration Operation

Autonomous vehicles are expected to improve road traffic safety as a new mode of travel,with the influx of social capital and policy support,related technologies and industries have made great progress in recent years,and the scale of open road test,demonstration operation and industrial application of autonomous vehicles has been expanding.At the same time,the construction of the test and evaluation standard system of high-order autonomous vehicles is still in the early stage of research at home and abroad.How to scientifically and effectively confirm that high-order autonomous vehicles can achieve safe,reliable and stable demonstration operation has become a major issue that needs to be solved in the current development stage of the industry.Aiming at the status quo,in actual operation of automatic driving bus demonstration projects of higher order needs as the guidance,using literature research,qualitative,quantitative study method,expert consultation method for automatic vehicle operation characteristics analysis,in view of the total package party as foothold,diversified evaluation for such project demand and the contradiction between traditional typical scenario assessment method,A solution is proposed.Firstly,the reliable operation capability of the refit part of the autonomous vehicle and the reliable response capability of the autonomous vehicle system to the target scene are taken as the core evaluation direction combined with the fishbone diagram method.The former focuses on the two directions of onboard system distribution and onboard network communication,and puts forward the evaluation method of onboard system reliable operation capability.The latter takes the target scene of the demonstration operation project as the core,proposes the quantitative evaluation theory of scene complexity based on AHP,and forms the reliable response capability evaluation method of the target scene by coupling with the indicators of scene importance,scene robustness and line comfort.This method does not need to analyze the software reliability,but only analyzes the scene response data to achieve rapid evaluation.At the same time,it has adaptive characteristics and can flexibly match evaluation content according to the needs of different demonstration projects,which improves the reliability of evaluation results and effectively improves the efficiency of test evaluation.Finally,the method was applied to the L4 autonomous bus demonstration project of W company in practice.During the continuous operation of open road environment for 10 months,the changes of score values depicted the continuous improvement process of its operation reliability,and the correlation analysis with the take-over rate verified its rationality and effectiveness.This evaluation method has formed relevant enterprise standards in W Company,which not only provides standardized reliability guarantee for W Company in the implementation of autonomous bus demonstration operation projects,but also has certain guidance and application value in the implementation of other types of demonstration operation projects in the industry.