摘要
以六自由度6-TPS型并联机床为模型,分析了工件坐标系定位对刀具加工范围和运动精度的影响,并据此将工件坐标系定位归结为一类兼顾作业空间和运动精度的有约束非线性规划问题。基于求解非线性规划的复合形法,提出并开发了工件坐标系定位算法,并给出具体的算法流程。这种方法包括确定初始定位矢量、构造定位矢量的初始复合形、建立目标函数和优化计算4部分。最后,针对一组给定的刀位文件,利用上述方法进行了机床的定位规划和计算,验证了算法的合理性和实用性。
The kinematic accuracy of models of 6-D 6-TPS parallel kinematic machine tools are influenced by the locating of the workpiece coordinate system （WCS） in the machine＇s workspace. The analysis of the workpiece coordinate system location in the machine coordinate system was reduced to a class of nonlinear programming problems. The composite simplex algorithm was used to solve for the workpiece coordinate system location. The algorithm calculates an initial location vector, builds an initial composite simplex based on the initial location vector, and then optimizes an objective function for the kinematic accuracy. An example is given to optimize the location vector of a 6-TPS parallel kinematic machine tool for a given set of cutter locations.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第8期1023-1027,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(50305016
50275084)
关键词
精度
并联机床
工件坐标系
定位
accuracy
parallel kinematic machine tool
workpiece coordinate system
locating
