Design And Implementation Of Safty Of The Intended Functionality Hazard Analysis And Evaluation Method Based On Autonomous Driving Scenarios

With the development and maturity of autonomous driving-related technologies,the fifth level of fully autonomous vehicles will gradually become a reality from imagination,and people are also paying more and more attention to the safety of automobiles.Unlike the safety requirements of traditional cars,the safety requirements of self-driving cars are mainly reflected in three aspects: information security,functional safety and safty of the intended functionality（SOTIF）,of which functional safety and information security have been more mature research and application,while safety of expected functions has attracted the attention of experts in the industry in the past two years.Safty of the intended functionality targets hazards caused by non-system failure causes or personnel misoperation,and is characterized by unknowns and uncertainties.There-fore,how to identify SOTIF hazards more effectively from driving scenarios and how to analyze and risk assess these hazards are now key issues that need to be addressed.Based on the above background and problems,this paper proposes a method to ana-lyze and assess safty of the intended functionality hazards based on autonomous driving scenarios,including the construction method of hazard scenarios,HAZOP-based hazard analysis method and Bayesian hazard graph-based risk assessment method,where scenario construction and hazard analysis are necessary prerequisites for risk assessment,and the core of this paper’s work is the design of the risk assessment method,and the main The main work and contributions of this paper are as follows:· Propose virtual test scenario construction and HAZOP-based hazard analysis method This paper proposes a virtual test scenario construction method,which can effectively construct a high-risk test scenario.This paper analyzes the safty of the intended functionality hazards,summarizes them into three types,and proposes a HAZOP-based hazard analysis method,which shows the process of hazard analysis through specific examples and can be more effective for SOTIF analysis to obtain hazard maps.· Proposing a risk assessment method based on Bayesian hazard graphs As the core of the paper,this paper proposes a risk assessment method for expected functional safety based on Bayesian hazard maps,which provides a reliable quanti-tative assessment method for safty of the intended functionality risks by establish-ing Bayesian hazard graphs and proposing Bayesian probabilistic algorithms under three different structures,so as to comprehensively assess risks and thus obtain risk assessment scores.· Proposing a risk assessment method based on severity assignment This paper proposes a risk assessment method based on severity assignment,which is improved on the basis of functional safety risk assessment and three different risk parame-ters for assessment,this method can be used as a supplementary idea to the above Bayesian hazard map assessment method.