提出了基于约束的用户定义特征 (U ser Defined Feature,UDF)定义与实例化的通用机制及基于约束的特征库管理 ,并应用于国产 CAD/ CAM软件金银花 (L onicera)系统 ,以航空发动机转子为例 ,建立了转子特征库 ,对系统功能进行了验证 .该...提出了基于约束的用户定义特征 (U ser Defined Feature,UDF)定义与实例化的通用机制及基于约束的特征库管理 ,并应用于国产 CAD/ CAM软件金银花 (L onicera)系统 ,以航空发动机转子为例 ,建立了转子特征库 ,对系统功能进行了验证 .该项工作既为详细设计阶段考虑装配约束和制造约束提供了方便 ,提高了设计效率 ,也为将用户定义特征与产品功能相联系。展开更多
为了开发CATIA的用户自定义特征(User Defined Feature)来实现通用特征在不同零件文档上下文的灵活使用,首先对CATIA二次开发的各种方法做了分析比较,讨论了基于CAA(Component Application Architecture)的CATIA二次开发的基本原理,重...为了开发CATIA的用户自定义特征(User Defined Feature)来实现通用特征在不同零件文档上下文的灵活使用,首先对CATIA二次开发的各种方法做了分析比较,讨论了基于CAA(Component Application Architecture)的CATIA二次开发的基本原理,重点研究了CAA中数据模型扩展应用和用户自定义特征的创建方法,给出了具体的几何自定义特征开发实例。展开更多
管道支吊架设计工作中,设计人员要经常查阅专业资料对其进行变参数、变结构设计。为解决这个问题,本文将参数化技术和知识工程结合在一起,开发了基于知识的管道支吊架智能设计系统HangerWizard。该系统利用知识熔接技术、数据库技术、UD...管道支吊架设计工作中,设计人员要经常查阅专业资料对其进行变参数、变结构设计。为解决这个问题,本文将参数化技术和知识工程结合在一起,开发了基于知识的管道支吊架智能设计系统HangerWizard。该系统利用知识熔接技术、数据库技术、UDF(User Defined Feature)技术和知识向导界面设计技术,实现了管道支吊架的快速变形设计和支吊架参数与管道参数的同步更新。展开更多
To improve motion graph based motion synthesis,semantic control was introduced.Hybrid motion features including both numerical and user-defined semantic relational features were extracted to encode the characteristic ...To improve motion graph based motion synthesis,semantic control was introduced.Hybrid motion features including both numerical and user-defined semantic relational features were extracted to encode the characteristic aspects contained in the character's poses of the given motion sequences.Motion templates were then automatically derived from the training motions for capturing the spatio-temporal characteristics of an entire given class of semantically related motions.The data streams of motion documents were automatically annotated with semantic motion class labels by matching their respective motion class templates.Finally,the semantic control was introduced into motion graph based human motion synthesis.Experiments of motion synthesis demonstrate the effectiveness of the approach which enables users higher level of semantically intuitive control and high quality in human motion synthesis from motion capture database.展开更多
文摘为了开发CATIA的用户自定义特征(User Defined Feature)来实现通用特征在不同零件文档上下文的灵活使用,首先对CATIA二次开发的各种方法做了分析比较,讨论了基于CAA(Component Application Architecture)的CATIA二次开发的基本原理,重点研究了CAA中数据模型扩展应用和用户自定义特征的创建方法,给出了具体的几何自定义特征开发实例。
文摘管道支吊架设计工作中,设计人员要经常查阅专业资料对其进行变参数、变结构设计。为解决这个问题,本文将参数化技术和知识工程结合在一起,开发了基于知识的管道支吊架智能设计系统HangerWizard。该系统利用知识熔接技术、数据库技术、UDF(User Defined Feature)技术和知识向导界面设计技术,实现了管道支吊架的快速变形设计和支吊架参数与管道参数的同步更新。
基金Project(60801053) supported by the National Natural Science Foundation of ChinaProject(4082025) supported by the Beijing Natural Science Foundation,China+4 种基金Project(20070004037) supported by the Doctoral Foundation of ChinaProject(2009JBM135,2011JBM023) supported by the Fundamental Research Funds for the Central Universities of ChinaProject(151139522) supported by the Hongguoyuan Innovative Talent Program of Beijing Jiaotong University,ChinaProject(YB20081000401) supported by the Beijing Excellent Doctoral Thesis Program,ChinaProject (2006CB303105) supported by the National Basic Research Program of China
文摘To improve motion graph based motion synthesis,semantic control was introduced.Hybrid motion features including both numerical and user-defined semantic relational features were extracted to encode the characteristic aspects contained in the character's poses of the given motion sequences.Motion templates were then automatically derived from the training motions for capturing the spatio-temporal characteristics of an entire given class of semantically related motions.The data streams of motion documents were automatically annotated with semantic motion class labels by matching their respective motion class templates.Finally,the semantic control was introduced into motion graph based human motion synthesis.Experiments of motion synthesis demonstrate the effectiveness of the approach which enables users higher level of semantically intuitive control and high quality in human motion synthesis from motion capture database.
