多级联调机构的六西格玛设计及响应面法优化

发动机静子叶片联调机构是提高叶片角度关系可靠性,保证发动机裕度的重要部件,以往的设计多为类比设计,以经验为主,缺乏1种对典型结构进行数学建模的分析。介绍了1种基于六西格玛设计理念,结合数理统计理论和统计分析工具,构建多级联调机构的数学模型方法。用试验设计建立试验模型,通过统计手段分析各因子对响应的显著程度,建立响应面模型并分析了模型中各因子,建立转换函数,进行望目优化。在因子名义值确定后,用蒙特卡罗模拟法分析各因子的公差对装配后最终响应的敏感度,指导设计各因子的公差分配,避免了常规的等公差和经验设计缺陷。实践表明:该方法建立了可复用的设计和优化模型,具有一定工程实用价值。

VSV Crankshaft Linkage Design for Six Sigma and Response Surface Methodology Optimization

VSV mechanism of vane is an important component which improves the reliability of vane angle and guarantee surge margin of aeroengine. An analogy based design was usually used in ordinary design and a model of typical structure missed. A notion of Design for Six Sigma(DFSS) was implemented in a VSV crankshaft linkage design herein. It built a model with Design of Experiment(DOE), collected data by simulation in UG software and analyzed response surface to get the optimized results. A translated function was built in the analysis of response surface. A Monte Carlo simulation was conducted in the tolerance design to get a sensitivity relationship and led to tolerance allocation. The conventional design defect was avoided. The investigation results show that the method is of a certain value to build a reusable optimization model.