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摘要: 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。Abstract: 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.
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Key words:
- airport taxiway /
- operation control modeling /
- A-SMGCS /
- intersection module /
- line segment module /
- Petri net
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图 1 交叉口及其过程层模型通用模块
Figure 1. Taxiway intersection and its generic module for process model
图 2 滑行道直线段及其过程层模型通用模块
Figure 2. Taxiway line segment and its generic module for process model
图 4 基于AOKCTPN的滑行道运行控制决策单元
Figure 4. AOKCTPN-based decision-making unit for taxiway operation control
表 1 颜色数据类型
Table 1. Color data type
数据类型名称 描述 元素组成 I″ 交叉口资源标识 交叉口名称 S 交叉口资源状态 {S1, S2, S3} R 资源请求消息标识 {R1, R2, R3, R4} A′ 决策模块标识 决策模块编号 D 资源调度决策时间 {D1, D2, D3, D4} O″ 资源占用时间 {O″1, O″2, O″3, O″4} 
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表 2 颜色集
Table 2. Color set
名称 功能描述 颜色集 p 交叉口资源空闲且可供使用 I″×S1 p 交叉口资源等待分配 I″×S1×R×A′×D p、p 交叉口资源预分配 I″×S1×R×A′×D p、p 交叉口资源分配协商等待 I″×S1×R×A′×D Oj 交叉口资源分配协商申请信息 A′×R×I″×S Ij 交叉口资源分配协商完成信息 A′×R×I″×S p、p、p、p 交叉口资源占用请求消息 R×I″×A′ pc1j、pc2j、pc3j、pc4j 交叉口资源分配决策完成 R×I″×D×O″ tj, 0、tj, 1、tj, 2、tj, 3 接收资源占用请求消息 R×I″ tj, 4、tj, 7 预分配交叉口资源 R×I″×S1×A′ tj, 5、tj, 8 请求资源分配协商 R×I″×S1×A′ tj, 6、tj, 9 完成交叉口资源分配 A′×I″×R×S1×D tj, 10、tj, 11、tj, 12、tj, 13 交叉口资源恢复 R×I″×O″
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表 3 知识描述
Table 3. Knowledge description
名称 知识类型 知识描述 pj2 库迈出的基本描述性知识 库所名称: p 库所类型: 资源库所 库所容量: 4 库所的运行与数据统计知识 记录库所中的托肯数为mj 库所的规则知识 规则1:当mj=1时, 触发变迁tj, 4 规则2:当mj > 1时, 触发变迁tj, 7 tj, 7 变迁的基本描述性知识 变迁名称: tj, 7 变迁类型: 瞬时变迁 变迁的规则知识 激发的托肯类型限制: R×I″×S1×D×A′ 规则1:当pj2中的托肯消息标识为R1、R2时, 选择含有R2属性的托肯激发 规则2:当pj2中的托肯消息标识为R2、R3时, 选择含有R3属性的托肯激发 规则3:当pj2中的托肯消息标识为R3、R4时, 选择含有R4属性的托肯激发 规则4:当pj2中的托肯消息标识为R4、R1时, 选择含有R1属性的托肯激发
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