基于矩阵的装配过程建模方法

Assembly Process Modeling Method Based on Matrix Technique

装配型生产是一种典型的离散型生产,装配生产过程是装配状态在装配作业的驱动下不断发生转移而持续更新至完成状态的一个过程,本文提出了一种基于矩阵运算的装配过程建模方法,对这种由装配状态转移组织起来的生产过程进行了建模。文中给出了装配作业、装配状态以及作业有序关系等元素对象的矩阵表示方法;以矩阵的运算过程来表述生产流程,包括作业可操作性测试、装配状态转移、作业有序矩阵更新等;产品结构的层次性使得装配过程也会具有一定的层次性,对装配过程进行子装配划分,用分块矩阵表达装配过程与其子装配之间的层次关系,建立分层的装配过程模型。该模型通过装配过程的矩阵表示,最终可获得装配体的可行装配序列,为装配序列选优提供数据基础。

Assembly is a classic discrete production,and assembly process is a flow of assembly state transition which is driven by assembly task.A new method,based on matrix technique,is presented to be used to model the assembly process.By adopting the new method,elements of assembly process such as assembly task,assembly state and assembly precedence relations are shown as matrix,and the assembly process is represented by the process of matrix calculation,which includes testing of the assembly task＇s operability,assembly state transition,update of assembly precedence relations and so on.Because of the hierarchy of production structure,the assembly process can also be segmented into several sub-assembly processes that are reflected on block matrix,and then the assembly process modeling with hierarchy is established.The feasible assembly sequence is obtained from the process which is expressed by matrix,providing the basis for the optimization of assembly sequence.