高空模拟试验应急管理的Petri网建模及应用

Modeling of emergency management in altitude simulation testing with Petri net and its application

针对我国高空模拟试验的应急管理,构建了一个应急管理工作流策略,并对这个策略进行了Petri网建模.这个模型主要包括应急停车程序和紧急停车程序.应急停车程序以保证被试发动机与试验设备的安全、同时兼顾快速停车为目标,所以主要由一些串行处理环节组成;而紧急停车程序则以快速停车为目标,所以以并行处理环节为主.模型的分析表明:模型具有可达性、合理性、自由选择性、良构性和S可覆盖性.根据这个模型,对某发动机在高空模拟试验时的应急管理进行了演练,获得了完成各个变迁需要的响应时间.分析这些时间数据,找到了在紧急停车程序的应急管理操作中影响整体应急响应时间的关键环节.同时发现,在应急停车程序中,可以根据应急事件的分级在保证发动机和试验设备的安全与应急响应时间之间找到一个折中,最大化应急管理的效果.应急程序的修改和应急培训有效地减少了关键环节的应急响应时间.

An emergency management workflow strategy was constructed for altitude simulation testing,and a Petri net model of the strategy was modeled.The model mainly comprises an urgency stop program and a crisis stop program.The urgency stop program is aimed to ensure safety of the tested engine and the testing facilities,simultaneously,is got attention to quickly stop,so it is basically composed of some stages in series.But the crisis stop program is targeted for a quick response,therefore,its various stages is principally in parallel.By analyzing the model,it was demonstrated that the model is reachable,sound,with free choice,well-structure,and S-coverable characteristics.According to the Petri net model,an emergency management for an aero-engine in altitude simulation testing was trained,and the response time was obtained in each stage.Key stages that effect the response time of emergency management were found in the crisis stop program of emergency management operation by analyzing the time data.In the follow,it was found that maximum benefit come from a compromise between ensuring safety of tested engine,testing facilities and the response time according to emergency event level in the urgency stop program.Modified emergency program and training effectively reduced the emergency response time in the key stage.