根据ITER馈线系统特点，采用模板创建零件库，利用分层装配技术进行装配，提高了设计效率。
Base on the characteristic of ITER feeder System, template is used to create the parts, feeder is assembled with layers, all this can improve the design efficiency.
根据装配体step中性文件对装配模型进行分层，根据工程语义信息对装配模型进行简化。
Assembly model is layered according to the STEP neutral document of assembly and simplified according to the project semantics information.
为优化装配系统中公差链的公差值，建立了几何尺寸公差的优化模型，并提出公差的分层优化设计算法：第一层，解决设计公称值居中的优化问题；
In order to optimize tolerance values for an assembly system, a model for geometric dimension tolerance optimization was established and an algorithm for optimal tolerance design was proposed.
集成分层次的零件信息模型、装配模型及机构模型，建立面向数字化样机的产品信息基本模型表达。
A basic information model for digital mock-up is produced by integration of hierarchical part information, assembly model and mechanism model.
分层规划是指分别在部件层、组件层和零件层上进行装配顺序推理。
The layer upon layer indicates that the assembly sequence planning is carried out on components layer, subassembly layer and part layer respectively.
为在装配建模过程中保证信息的完整性，提出基于装配对象属性的分层约束装配模型。
In order to realize the information integrity of assembly modeling process, this paper proposes the hierarchical constraint assembly model which is based on assembly object properties.
为了自主规划空间在轨装配任务的装配序列，结合大型空间桁架结构的固有分层特性，提出了一种基于连接矩阵的分层规划方法。
Then connection matrix algorithm is used to find out all of the possible paths, and a pseudo-node is added to realize the calculation of circuit loops.
为了自主规划空间在轨装配任务的装配序列，结合大型空间桁架结构的固有分层特性，提出了一种基于连接矩阵的分层规划方法。
Then connection matrix algorithm is used to find out all of the possible paths, and a pseudo-node is added to realize the calculation of circuit loops.
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