Sobol序列
灵敏度(控制系统)
机械加工
运动学
计算机科学
机床
研磨
曲面(拓扑)
算法
机械工程
控制理论(社会学)
数学
工程类
几何学
人工智能
物理
控制(管理)
电子工程
经典力学
作者
Shuai Chen,Tong Bai,Yun Zhang,Zhenglong Fang,Zhitong Chen
标识
DOI:10.1016/j.precisioneng.2024.01.021
摘要
A six-axis machining configuration is proposed to improve the surface quality and finishing efficiency of an aeroengine blisk. It flexibly enlarges the accessible interference-free space of the tool for finishing the full-shape surface, including the blade body, root, and hub surfaces. An error model for tool contact posture with respect to the kinematic axis errors is established, revealing the relationship between the kinematic deviation of the axes and resultant profile error. An improved Sobol method is applied for error sensitivity analysis to identify crucial error terms based on the quasi-Monte Carlo algorithm. In particular, an efficient error sensitivity index is proposed by combining a unified objective function to identify crucial error terms, followed by the simulations and cutting experiments for validation. As a result, the blade profile error was successfully suppressed by approximately 40 % in most. This work provides a fundamental framework for elevating the multi-axis machining accuracy of aeroengine blisk.
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