期刊
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
卷 40, 期 -, 页码 213-231出版社
ELSEVIER
DOI: 10.1016/j.cirpj.2022.11.007
关键词
Bayesian optimization; Gaussian process regression; Manufacturing; Multi-objective optimization; Process optimization
This research presents a method that combines stacked Gaussian processes (stacked GP) with target vector Bayesian optimization (BO) to solve multi-objective inverse problems of chained manufacturing processes. Through stacked GPs, epistemic uncertainty can be propagated through all chained manufacturing processes. In the optimization of chained processes, there are options to use a single unified surrogate model for the entire joint chain or have a surrogate model for each individual process and cascade the optimization from the last to the first process. For improved target vector BO results of chained processes, the proposed approach combines methods that under- or overestimate uncertainties in an ensemble for rank aggregation. Thorough analysis and evaluation are conducted on artificial use cases and a typical manufacturing process chain.
This research presents an approach that combines stacked Gaussian processes (stacked GP) with target vector Bayesian optimization (BO) to solve multi-objective inverse problems of chained manufacturing processes. In this context, GP surrogate models represent individual manufacturing processes and are stacked to build a unified surrogate model that represents the entire manufacturing process chain. Using stacked GPs, epistemic uncertainty can be propagated through all chained manufacturing processes. To perform target vector BO, acquisition functions make use of a noncentral chi-squared distribution of the squared Euclidean distance between a given target vector and surrogate model output. In BO of chained processes, there are the options to use a single unified surrogate model that represents the entire joint chain, or that there is a surrogate model for each individual process and the optimization is cascaded from the last to the first process. Literature suggests that a joint optimization approach using stacked GPs overestimates uncertainty, whereas a cascaded approach underestimates it. For improved target vector BO results of chained processes, we present an approach that combines methods which under-or overestimate uncertainties in an ensemble for rank aggregation. We present a thorough analysis of the proposed methods and evaluate on two artificial use cases and on a typical manufacturing process chain: preforming and final pressing of an Inconel 625 superalloy billet. (c) 2022 CIRP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据