To assess the interaction risks among multiple aircraft in complex traffic scenarios,a concept of"interac-tion potential fields of multiple aircraft and airspace environment"is developed,which is based on the similarity be-tween traffic risk and potential field theory.The interaction potential fields(IPF)generated by aircraft,critical air-space points(CAPs)and air routes(ARs)are defined,respectively,and the generation functions of IPFs are formu-lated.Considering the short-term effects of historical trajectories on the aircraft,a time-varying historical trajectory IPF is added to the real-time aircraft IPFs;considering the requirement of safety intervals in horizontal and vertical dimensions for aircraft,the parameters of rule-compliant IPFs are found;then,a fusion method is developed to inte-grate IPFs generated by aircraft,CAPs and ARs.Inspired by the relationship between potential field force and poten-tial energy,a potential energy-based risk index is introduced,denoted as RPE,showing the changes of risk over time in multi-aircraft scenarios from the perspective of energy.To validate the effectiveness of the proposed method,a simulation based on a real airspace section is introduced,and the results show that:①RPE is much closer to the precepted risk by the air traffic operators(RSE)compared with traditional risk indicators;②RPE is more sensitive at certain intervals than the conflict time-based index RATSR,with a mean absolute error of 0.077.In brief,the pro-posed risk assessment method could offer more precise decision support for risk management in complex air traffic scenarios in the future.
关键词
交通安全/多航空器交互/势场理论/风险评估
Key words
traffic safety/multi-aircraft interaction/potential field theory/risk assessment
维普
万方数据