US Patent No: 5,838,561

Number of patents in Portfolio can not be more than 2000

Automatic control loop monitoring and diagnostics

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Abstract

A method of diagnosing a malfunction of a process control system which includes at least one closed loop control loop comprising measuring a histogram of tracking error of the control loop, determining distortion of the tracking error relative to a Gaussian distribution, and indicating a malfunction in the process in the event a deviation from the Gaussian distribution of the tracking error exceeds predetermined limits.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FPINNOVATIONSPOINTE-CLAIRE QUEBEC98

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Owen, James Gareth Montreal, CA 2 44

Cited Art

Patent Info (Count) # Cites Year
 
INVENSYS SYSTEMS, INC. (3)
4,855,897 Method and apparatus for statistical set point bias control 19 1987
5,150,289 Method and apparatus for process control 73 1990
5,239,456 Method and apparatus for process control with opimum setpoint determination 11 1990
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
5,196,997 Method and apparatus for quality measure driven process control 17 1991
5,301,118 Monte carlo simulation design methodology 63 1991
 
CRANE NUCLEAR, INC. (1)
5,329,465 Online valve diagnostic monitoring system 108 1989
 
INSTITUT FRANCAIS DU PETROLE (1)
4,964,388 Method and device for regulating a controlled ignition engine from the statistic distribution of an angular divergence 6 1988
 
LOCKHEED MARTIN CORPORATION (1)
5,293,323 Method for fault diagnosis by assessment of confidence measure 64 1991
 
MITSUBISHI JUKOGYO KABUSHIKI KAISHA (1)
5,249,119 Apparatus for and method of detecting a malfunction of a controller 6 1991
 
STORAGE TECHNOLOGY CORPORATION (1)
4,885,676 Control loop instability detection and correction apparatus 16 1988

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
FISHER-ROSEMOUNT SYSTEMS, INC. (17)
6,298,454 Diagnostics in a process control system 156 1999
6,615,090 Diagnostics in a process control system which uses multi-variable control techniques 92 2000
6,557,118 Diagnostics in a process control system 20 2001
7,562,135 Enhanced fieldbus device alerts in a process control system 1 2001
7,206,646 Method and apparatus for performing a function in a plant using process performance monitoring with process equipment monitoring and control 63 2001
7,346,404 Data sharing in a process plant 21 2002
8,044,793 Integrated device alerts in a process control system 1 2002
8,073,967 Web services-based communications for use with process control systems 2 2002
7,557,702 Integrated alert generation in a process plant 8 2003
7,272,531 Aggregation of asset use indices within a process plant 1 2005
8,005,647 Method and apparatus for monitoring and performing corrective measures in a process plant using monitoring data with corrective measures data 0 2005
8,301,676 Field device with capability of calculating digital filter coefficients 0 2007
7,702,401 System for preserving and displaying process control data associated with an abnormal situation 0 2007
8,055,479 Simplified algorithm for abnormal situation prevention in load following applications including plugged line diagnostics in a dynamic process 0 2007
8,036,760 Method and apparatus for intelligent control and monitoring in a process control system 2 2008
8,417,595 Economic calculations in a process control system 0 2010
8,046,096 Analytical server integrated in a process control network 1 2010
 
FISHER CONTROLS INTERNATIONAL LLC (5)
6,466,893 Statistical determination of estimates of process control loop parameters 31 1999
6,804,618 Detection and discrimination of instabilities in process control loops 11 2001
7,349,745 Lead-lag input filter arrangement with adjustable initial conditions for electro-pneumatic control loops 1 2006
7,593,802 Lead-lag input filter arrangement for electro-pneumatic control loops 0 2006
7,917,233 Lead-lag filter arrangement for electro-pneumatic control loops 0 2009
 
ABB INC. (2)
6,799,143 Process and device for evaluating the performance of a process control system 2 2002
6,865,511 Process and device for evaluating the performance of a process control system 2 2004
 
HONEYWELL ASCA INC. (2)
7,459,060 Reverse bump test for closed-loop identification of CD controller alignment 1 2005
7,820,012 Reverse bump test for closed-loop identification of CD controller alignment 2 2008
 
HUGO, ALAN J. (2)
6,459,939 Performance assessment of model predictive controllers 7 1999
6,546,358 Performance assessment of non-deadtime compensated controllers 0 2000
 
ROSEMOUNT INC. (2)
7,221,988 Creation and display of indices within a process plant 7 2004
8,032,234 Diagnostics in process control and monitoring systems 0 2006
 
ALAN J. HUGO (1)
6,594,593 Performance assessment of controllers applied to integrating processes 0 2000
 
EMERSON PROCESS MANAGEMENT POWER & WATER SOLUTIONS, INC. (1)
7,856,280 Process control and optimization technique using immunological concepts 0 2006
 
EXPERTUNE, INC. (1)
6,993,396 System for determining the health of process control feedback loops according to performance assessment criteria 6 2003
 
FISHER CONTROLS LLC. (1)
7,039,537 Detection and discrimination of instabilities in process control loops 6 2004
 
FPINNOVATIONS (1)
7,010,376 Diagnostic for poorly tuned control loops 0 2003
 
GENERAL CYBERNATION GROUP, INC. (1)
7,016,743 Model-free adaptive control of quality variables 2 2004
 
INVENSYS SYSTEMS, INC. (1)
6,847,850 Process control loop analysis system 20 2002
 
MITSUBISHI ELECTRIC CORPORATION (1)
7,877,634 Data collecting apparatus and gateway apparatus 1 2005
 
SIEMENS INDUSTRY, INC. (1)
8,428,909 Use of statistics to determine calibration of instruments 0 2008
 
SMAR RESEARCH CORPORATION (1)
6,095,674 Windows based network configuration and control method for a digital control system 52 1998
 
SMS DEMAG AG (1)
8,141,401 Method and apparatus for analyzing a layer of metal-working liquid 0 2007
 
THE GOVERNORS OF THE UNIVERSITY OF ALBERTA (1)
8,145,328 Detection and quantification of stiction 0 2005
 
X-RAY OPTICAL SYSTEMS, INC. (1)
7,092,843 Apparatus and method for suppressing insignificant variations in measured sample composition data, including data measured from dynamically changing samples using x-ray analysis techniques 1 2004
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
6,959,261 System for tracking and assessing changes in technical processes 0 2003