工程机械三维建模关键技术研究

工程机械的虚拟训练系统涉及工程机械的三维模型重构等关键技术问题,严重影响了国内这方面的开发与应用。研究了工程机械三维建模过程中的几个关键性技术难题。探讨了基于快速三维拟合曲面技术和NURBS复合曲面重构技术的工程装备零部件的三维建模方法,阐述了建模步骤与生成方法。研究了三维模型的优化方法,构建了模型的优化步骤,研究了模型优化关键技术和结构优化关键技术。根据研究结果建立了场景逼真、操作交互性强的虚拟训练系统,为构建基于三维模型的工程机械虚拟训练系统提供了较好的技术基础。

Research on Key Technique of Three-dimensional Modeling for Construction Machinery

The virtual training system of construction machinery involves a large number of technical problems in three- dimensional model reconstruction which affect the promotion and application in our country. In this paper,several key techniques for the reconstruction of three- dimensional modeling are addressed. The reconstruction method for three views of machine parts is proposed based on rapid 3D surface fitting as well as NURBS composite surface. Then optimization method and steps of 3D modeling are accomplished. The modeling and sturcture optimization techniques are studied in detail. The virtula training system with real scence and considerable capability of interactive control is developed according to the research result,thus it provides better technical basis for the establishment of the virtual training system for the construction machinery based on 3D modeling.