Boots – shoes – and leggings
Patent
1994-08-25
1996-01-02
Gordon, Paul P.
Boots, shoes, and leggings
364157, 364158, 364160, G05B 1302
Patent
active
054814537
ABSTRACT:
The proportional-integral-derivative controller produces a process control signal in response to a process variable signal and a setpoint signal. The process variable signal is subtracted from the setpoint signal to produce a difference signal, and a signal representative of the derivative of the process variable is produced. In an inner loop the setpoint signal, the difference signal and the derivative signal are amplified by respective adjustable gains. In an outer loop the process variable signal and the derivative signal are amplified by respective adjustable gains and the difference signal is integrated. The amplified and integrated signals are combined and applied to another adjustable gain to produce an outer-loop output signal. The amplified setpoint, difference and derivative signals, and the outer-loop output signal are finally combined to produce the process control signal. The gains of the inner loop affect the input/output characteristics of the controller and the gains of the outer loop the sensitivity of the controller to perturbations. Also, adjustment of the sensitivity through the gains of the outer loop does not change the input/output characteristics of the controller that have been previously adjusted by means of the gains of the inner loop after having set the gains of the outer loop equal to zero.
REFERENCES:
patent: 4346433 (1982-08-01), Rutledge
patent: 4719561 (1988-01-01), Shigemasa
patent: 4908747 (1990-03-01), Lane et al.
patent: 4956776 (1990-09-01), Carre
patent: 4967128 (1990-10-01), Sawai et al.
patent: 4999557 (1991-03-01), Inoue
patent: 5105138 (1992-04-01), Hiroi
patent: 5111124 (1992-05-01), Kurosawa
patent: 5152239 (1992-10-01), Hossfield et al.
patent: 5220265 (1993-01-01), Araki et al.
patent: 5229699 (1993-07-01), Chu et al.
patent: 5247432 (1993-09-01), Ueda
patent: 5250887 (1993-10-01), Kurosawa
patent: 5283729 (1994-02-01), Lloyd
patent: 5351184 (1994-09-01), Lu et al.
patent: 5371670 (1994-12-01), Lurie
"Optimum Settings for Automatic Controllers" J. G. Ziegler and N. B. Nichols--Transactions of the A.S.M.E. Nov. 1942 pp. 759-768.
"Optimum Settings for Automatic Controllers" J. G. Ziebler and N. B. Nichols--Transactions of the ASME vol. 115, Jun. 1993 pp. 220-222.
"An Adaptive PI/Sliding Mode Controlle for a Speed Drive" R. M. DeSantis--Journal of Dynamic Systems, Measurement, and Control Sep. 1989 vol. 111 pp. 409-415.
"Theoretical Consideration of Retarded Control" G. H. Cohen and G. A. Coon--Transactions of the ASME Jul. 1953 pp. 827-834.
"A Comparison of PID Control Algorithms" J. P. Gerry--Control Engineering Mar. 1987 pp. 102-105.
"Self-Tuning PID Controllers: Algorithms and Implementation" P. J. Gawthrop--IEEE Transactions on Automatic Control, vol. AC-31 N.sup.o 3, Mar. 1986 pp. 201-208.
"Refinements of the Ziegler-Nichols tuning formula" C. C. Hang, K. J. .ANG.strom, W. K. Ho IEE Proceedings-D. vol. 138, N.sup.o 2, Mar. 1991 pp. 111-118.
"Self-tuning predictive PID controller" P. Vega, C. Prada, V. Aleixandre--IEE Proceedings -D vol. 138, N.sup.o 3, May 1991 pp. 303-311.
"PID Control Revisited" P. Persson and K. J. .ANG.strom--IFAC vol. 8 1993 pp. 241-244.
"Dynamic Transfer among Alternative Controllers" S. F. Graebe and A. Ahlen--IFAC 1993 vol. 8 pp. 245-248.
"Model Reduction for PID Design" A. J. Isaksson and S. F. Graebe--IFAC 1993 vol. 8 pp. 257-262.
"Venturing into Space with Robotic Mechanisms" IEEE Control Systems Society vol. 13 N.sup.o 6, Dec. 1993 pp. 58-65.
Corporation de l'Ecole Polytechnique
Gordon Paul P.
LandOfFree
Dual loop PID configuration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual loop PID configuration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual loop PID configuration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-240363