Boots – shoes – and leggings
Patent
1996-08-01
1998-10-06
Elmore, Reba I.
Boots, shoes, and leggings
364154, 364159, 364164, 364166, G06B 1302
Patent
active
058187146
ABSTRACT:
A process control system controls a non-self regulating process through a control output signal based on a set point and a measured process variable. The process control system includes a control circuit having a set point input, a process variable input and a control output. The control circuit generates the control output signal on the control output as a function of the set point received on the set point input and the measured process variable received on the process variable input. An auto-tuning circuit excites the process, estimates a process model based on an intersection between rising and falling asymptotes of the measured process variable, and then tunes the control function to the process based on the process model. The auto-tuning circuit obtains robust results, but is computationally simple such that the circuit can be implemented with hardware or software in low-power and low-memory applications, such as in field-mounted controllers.
REFERENCES:
patent: 3727035 (1973-04-01), Pemberton
patent: 4006346 (1977-02-01), Pemberton
patent: 4232364 (1980-11-01), Bibbero
patent: 4441151 (1984-04-01), Hayashibe
patent: 4563734 (1986-01-01), Mori et al.
patent: 4602326 (1986-07-01), Kraus
patent: 4641235 (1987-02-01), Shingemasa et al.
patent: 4646226 (1987-02-01), Moon
patent: 4669040 (1987-05-01), Pettit et al.
patent: 4679136 (1987-07-01), Shingemasa
patent: 4719561 (1988-01-01), Shingemasa
patent: 4814968 (1989-03-01), Fukumoto
patent: 4852053 (1989-07-01), Turrie
patent: 4855674 (1989-08-01), Murate et al.
patent: 4882526 (1989-11-01), Iino et al.
patent: 4885897 (1989-12-01), Shinskey
patent: 4983898 (1991-01-01), Kanda
patent: 5043862 (1991-08-01), Takahashi et al.
patent: 5057993 (1991-10-01), Kanda
patent: 5126933 (1992-06-01), White, III
patent: 5153807 (1992-10-01), Saito et al.
patent: 5159547 (1992-10-01), Chand
patent: 5170341 (1992-12-01), Sklaroff
patent: 5184122 (1993-02-01), Decious et al.
patent: 5283729 (1994-02-01), Lloyd
patent: 5331541 (1994-07-01), Ueda et al.
patent: 5333114 (1994-07-01), Warrior et al.
patent: 5341288 (1994-08-01), Shinskey et al.
patent: 5371670 (1994-12-01), Lurie
patent: 5406474 (1995-04-01), Hansen
patent: 5453925 (1995-09-01), Wojsznis et al.
patent: 5485400 (1996-01-01), Warrior et al.
patent: 5504672 (1996-04-01), Hardiman et al.
patent: 5519605 (1996-05-01), Cawlfield
patent: 5587899 (1996-12-01), Ho et al.
"PID Tuning: It's The Method, Not the Rules," D. W. St. Clair and P. S. Fruehauf, Intech Engineer's Notebook, Dec. 1994, pp. 27-30.
"Tuning Process Controllers," T. B. Kinney, Chemical Engineering, Sep. 19, 1983, pp. 67-72.
"Internal Model Control. 4. PID Controller Design," D. E. Rivera, M. Morari, S. Skogestad, Industrial & Engineering Chemistry Process Design and Development, vol. 25, No. 1, Jan. 1986, pp. 252-265.
"Auto-Tuning," Adaptive Control, K. J. Astrom and B. Wittenmark, Published by Addiston-Wesley Publishing Company, copyright 1989, pp. 328-342.
Advertising Brochure: "Excalibur 7000. The Cutting Edge of Technology." Robertshaw Tennessee, undated.
Advertisement: "Excalibur 7000. The Cutting Edge of Technology." published in Instrumentation & Control Systems, Sep. 1995, vol. 68, No. 9.
"Autotuning," Automatic Tuning of PID Controllers, K. J. Astrom and T. Hagglund, published by Instrument Society of America, Copyright 1988, pp. 105-110.
"Design of PID Controllers," Automatic Tuning of PID Controllers, K. J. Astrom and T. Hagglund, published by Instrument Society of America, Copyright 1988, pp. 51-61.
Industrial Instrumentation Condensed Catalog, Robertshaw Tennessee, Apr. 1992.
Brigham Scott E.
Zou Hehong
Elmore Reba I.
Patel Ramesh
Rosemount Inc.
LandOfFree
Process control system with asymptotic auto-tuning does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process control system with asymptotic auto-tuning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process control system with asymptotic auto-tuning will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-85878