Journal ArticleDOI
Process trending with piecewise linear smoothing
TLDR
A new method is proposed, Piecewise Linear Online Trending (PLOT), which is statistically based and which performs significantly better, adapts to process variability and noisy data, recognizes and eliminates outliers, and it is robust even in the presence of outliers.About:
This article is published in Computers & Chemical Engineering.The article was published on 1995-02-01. It has received 46 citations till now. The article focuses on the topics: Smoothing & Piecewise linear function.read more
Citations
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Journal ArticleDOI
Refinery-wide control loop performance assessment
TL;DR: In this paper, the authors discuss the application of control loop performance assessment (CLPA) in a refinery setting and describe procedures for selecting these parameters which make it feasible to implement the algorithm on a refinery-wide scale.
Journal ArticleDOI
Fault diagnosis using dynamic trend analysis: A review and recent developments
TL;DR: The effectiveness of the interval halving and trend matching is shown through simulation studies on the fault diagnosis of the Tennessee Eastman process and a novel interval-halving method for trend extraction and a fuzzy-matching-based method for similarity estimation and inferencing are presented.
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A Novel Interval-Halving Framework For Automated Identification of Process Trends
TL;DR: A novel approach is proposed to automatically identify the qualitative shapes of sensor trends using a polynomial-fit based interval-halving technique and a unique assignment of qualitative shape is made to each of the identified segments.
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Fault Diagnosis by Qualitative Trend Analysis of the Principal Components
TL;DR: In this article, principal component analysis (PCA) is applied on the principal components rather than on the sensor data for fault detection and diagnosis in large-scale chemical plants, and the proposed approach is tested on the Tennessee Eastman (TE) process.
Journal ArticleDOI
An Intelligent System for Reaction Kinetic Modeling and Catalyst Design
TL;DR: In this article, the authors describe Reaction Modeling Suitea rational, automated, and intelligent environment, based on systems, artificial intelligence, and optimization techniques that aid the development of kinetic models.
References
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Historical data recording for process computers
J.C. Hale,H.L. Sellars +1 more
TL;DR: Newly developed process historian functions that have been used on several of its in-house process monitoring and control systems in Du Pont factories are described.
Journal ArticleDOI
The Use of Historical Data Storage and Retrieval Systems at Nuclear Power Plants
TL;DR: The Historical Data Storage and Retrieval system will record, store, recall, and display historical information as it is needed by plant personnel as well as respond to the user's needs under a variety of situations.