摘要
为了准确、稳定地定位具有复杂自由曲面的被检测零件,提出一种基于3-2-1约束的移动点法,使得定位点能够在被测零部件表面上连续移动,避免了传统算法因离散化工件模型所导致的精度损失。将定位准确性和稳定性作为评价指标,提出一种定位方案设计多目标优化和择优算法,能够无需人工干预地选取最终优化的权衡解。基于计算机辅助设计平台实现了相关算法,并通过实例验证了算法的可行性和实用性。
To hold a checked part with complex freeform surface accurately and stably in checking fixture design, a moving point method based on 3-2-1 constraint was proposed which made locator move on the parts surface continu ously. It could remove the precision loss in traditional optimization methods by model discretization. At the same time, a multi-objective optimization and decision algorithm for locating scheme was proposed by taking the accuracy and stability as two optimization objects, and the final optimization solution was selected without manual interven- tion. The algorithm was realized based on CAD software and two case studies were presented to verify its feasibility and practicability.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2014年第1期89-95,共7页
Computer Integrated Manufacturing Systems
基金
国家自然科学基金资助项目(60903111)~~
关键词
检具设计
定位点布局
连续搜索
多目标优化
checking fixture design
locator layout
continuous searching
multi-objective optimization
