以网络为中心的协同特征造型

在网络化同步协同设计环境中，如何实现CAD系统之间的实时数据交换和模型同步，成为协同几何造型的关键问题。文中提出了一种新的复制式协同特征造型方法，该方法将现有的特征造型技术与分布计算、网络通信技术相结合，通过简单的造型消息交换来实现增量式协同造型，可以较好地满足几何模型实时同步的需要，而且也部分地解决了异构CAD软件之间的数据交换问题；并详细地介绍了协同造型通信协议、对象引用机制、以及分布式协同造型系统。

Network-Centric Collaborative Feature-Based Modeling

Current networking and Internet technologies have made CAD/CAM activities changing from traditional single user application to multi user collaborative application. Within a spatially distributed, network centric collaborative design environment, real time data exchange and product model synchronization become a key problem for collaborative geometric design. In this paper, we propose a new approach for replicated collaborative feature based modeling. This new approach combines feature based modeling technique with distributed computing and network communication technologies. It implements incremental collaborative modeling based on simple modeling operations message exchange. This new approach can realize real time data exchange and model synchronization for collaborative design effectively. We also introduce collaborative modeling communication protocol, modeling object reference and collaborative modeling system in detail.