基于EHPN的A-SMGCS机场滑行道运行控制建模

针对先进机场场面引导与控制系统(A-SMGCS)中滑行道运行控制建模, 提出一种基于扩展层次Petri网(EHPN)的建模方法。将滑行道分为交叉口和直线段模块, 然后对模块内部的航空器行为进行封装, 形成基于扩展Petri网的过程层通用模块, 并进一步采用同步合成技术建立过程层模型。利用面向Agent的着色赋时Petri网建立决策层通用模块, 同时将场面运行控制知识与模块的库所和变迁集成, 增强模型的智能决策能力。采用某机场12 h滑行道运行数据进行了仿真试验。研究结果表明: 基于EHPN模型的仿真, 其直线段和交叉口冲突次数分别为6次和11次, 滑行道系统总延误为346 s, 与SIMMOD仿真模型效果相近, 因此, 该建模方法有效。

EHPN-based modeling of airport taxiway operation control in A-SMGCS

For the modeling of taxiway operation control in advanced surface movement guidance and control system (A-SMGCS), an extended hierarchical Petri net (EHPN)-based method was proposed.The taxiway system was divided into intersection and line segment modules.Aircraft behaviors in the two modules were encapsulated, and extended Petri net (EPN)-based generic modules were formed.The process layer model was constructed by using synchronizing composition techniques.An agent-oriented colored time Petri net (AOKCTPN) modeling approach was used to establish generic decision-making module.The operation control knowledge of taxiway was integrated into places and transitions, and the intelligent decision-making ability of decision-making layer model was enhanced.The taxiway operation data of some airport in 12 h were used to conduct simulation.Analysis result indicates that the conflict numbers in taxiway line segment and intersection are 6 and 11 respectively, and the total delay of taxiway system is 346 s.The result is relatively consistent with that of SIMMOD model, so the EHPN-based method is feasible.