Diagnosis of process nonlinearities and valve stiction: data driven approaches

The subject matter of the book is concerned with the detection and diagnosis of process nonlinearities from routine process data. In general, processes canbe treated as locally linear and measures of overall process performance can be monitored from routine operating data. However when process performance is not satisfactory then it is imperative that the cause of poor performance be diagnosed. Poor performance can be due to several reasons. Statistics abound onthe cause of poor control performance. It has been documented that as many as40% of the control loops in industry perform unsatisfactorily because of valve problems, a majority of them due to valve stiction, causing the closed loop system to become nonlinear. The development of signal processing methods to detect and quantify process nonlinearity from routine process data is the main subject matter of this book. Analyses three important causes of performance deterioration common in process control and is of significant practical value in process plant troubleshooting INDICE: Introduction.- Higher Order Statistics: Preliminaries.- Bispectrumand Bicoherence.- Impact of Data Compression and Quantization on Data Driven Process Analyses.- Measures of Nonlinearity – A Review.- Linear or Nonlinear? A Bicoherence Based Measure of Nonlinearity.- A Nonlinearity Measure Based on Surrogate Data Analysis.- Nonlinearities in Control Loops.- Diagnosis of Poor Control Performance.- Different Types of Faults in Control Valves.- Stiction: Definition and Discussions.- Physics Based Model of Control Valve Stiction.- Data Driven Model of Valve Stiction.- Describing Function Analysis.- Automatic Detection and Quantification of Valve Stiction.- Industrial Applications of the Stiction Quantification Algorithm.- Confirming Valve Stiction.- Detection ofPlantwide Oscillations.- Diagnosis of Plantwide Oscillations.- References.

• ISBN: 978-3-540-79223-9
• Editorial: Springer
• Encuadernacion: Cartoné
• Páginas: 315
• Fecha Publicación: 01/07/2008
• Nº Volúmenes: 1
• Idioma: Inglés