文献类型：会议论文

英文题名：Stiction Quantification based on Time and Frequency Domain Criterions

作者：Li, Chen[1];Qian, Feng[1];Choudhury, M. A. A. Shoukat[2];Du, Wenli[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat, Shanghai 200237, Peoples R China;[2]BUET, Dept Chem Engn, Dhaka 1000, Bangladesh

会议论文集：9th IFAC Symposium on Advanced Control of Chemical Processes ADCHEM 2015

会议日期：JUN 07-10, 2015

会议地点：Whistler, CA

语种：英文

外文关键词：Process monitoring; Valve stiction; Frequency domain analysis; Global optimization

摘要：Valve Stiction of the most common causes for poor performance in industrial control loops. Therefore, a non-invasive method which can detect and quantify stiction is urgently needed in the process industry. Most of the current stiction estimation methods use time domain criterion, e.g. Mean Square Error, to jointly identify the stiction and process model parameters. However, stiction induced oscillation is a phenomenon which has some specific characteristics in the frequency domain. Thus, extracting frequency domain information in the routine operation data will provide a more reliable mid accurate stiction estimation. In this work, under the framework of Hammerstein model identification and global optimization, new stiction quantification method based on time and frequency domain criterions is proposed. Several simulation case studies are demonstrated to validate the proposed method. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. Ail rights reserved.