装配序列约束下的飞机虚拟维修过程建模仿真

Modeling and simulation of aircraft virtual maintenance process based on assembly sequence constraints

针对当前飞机虚拟维修过程模型固化,对维修复杂行为关系缺乏考虑,无法满足学员多样性实训需求的现状,充分考虑了飞机系统的复杂度、学员操作的不规范性和随机性等因素,依据各维修装配序列间的优先约束关系,构建了优先约束矩阵,进而定义了优先约束时间有色Petri网模型。在系统梳理维修实体及其维修操作行为的基础上,提出了虚拟维修实体操作元模型和元模型融合下的过程建模,阐述了基于优先约束时间有色Petri网的动态虚拟维修过程实现方法。最后,以A320飞机加油活门的某一个随机拆卸过程为例,进行建模仿真,验证了模型的有效性。

Current aircraft virtual maintenance process models suffer solidification,do not fully consider the relationship between complex maintenance behaviors,and cannot meet the trainees'diverse training needs.Given the complexity of aircraft systems,the not standard and random operation of trainees,we construct a priority constraint matrix according to the priority constraint relationship among maintenance assembly sequences,and then define the priority constraint timed colored Petri net(TCPN)model.On the basis of systematic examination of the maintenance entities and their maintenance operations,we propose a virtual maintenance entity operational meta-model and a process model based on the meta-model fusion,and describe the implementation method of the dynamic virtual maintenance process based on priority constraint TCPN.Finally,an example of a random disassembly process of a refueling valve of an A320 aircraft is modeled and simulated to verify the model.