Boots – shoes – and leggings
Patent
1996-06-19
1998-04-28
Voeltz, Emanuel T.
Boots, shoes, and leggings
364150, 364151, 364163, 318610, 318615, G05B 1302, G05B 1142
Patent
active
057453624
ABSTRACT:
In the digital PID (P:proportional, I:integral, D:derivative) control apparatus of the present invention, in which a deviation is obtained from a controlling amount of an object to be controlled, and a target value, a velocity type PI control operation is carried out on the deviation, a velocity type D control operation is carried out on the deviation or the controlling amount, these velocity type control operation outputs are synthesized, and then converted into a position type manipulation signal, and this signal is supplied to the object to be controlled, the derivation processing unit includes the judgment unit for judging whether K=2.multidot..DELTA.t/(.DELTA.t+2.eta..multidot.TD).ltoreq.1, or K>1 by using a control operation period .DELTA.t, a derivative time TD and a derivative gain 1/.eta., and the operation unit which carries out a lagged derivative operation by a bilinear transfer method when K.ltoreq.1, or carries out an exact derivative operation when K>1.
REFERENCES:
patent: 3834617 (1974-09-01), Dyntar
patent: 4430698 (1984-02-01), Harris
patent: 4466054 (1984-08-01), Shigemasa et al.
patent: 4563735 (1986-01-01), Hiroi et al.
patent: 4714988 (1987-12-01), Hiroi et al.
patent: 4755924 (1988-07-01), Hiroi
patent: 5059880 (1991-10-01), Hiroi
patent: 5119288 (1992-06-01), Hiroi
patent: 5311421 (1994-05-01), Nomura et al.
patent: 5442273 (1995-08-01), Ikawa et al.
patent: 5477457 (1995-12-01), Okada
patent: 5535117 (1996-07-01), Hiroi
Hiroi, "The Basic and Application of the Digital Instrumentatiion Control System", Ind. Technology Corp., pp. 90-95, 1987.
Sato, et al., "Steam temperature prediction control for thermal power plant", IEEE Trans. on Power Apparatus & Systems, PAS-103, No. 9, pp. 2382-2387, Sep. 1984.
M. Nomura, et al., "Adaptive optimal control of steam temperatures for thermal power plants", IEEE Trans. on Energy Conversion, vol. 4, No. 1, pp. 25-33, Mar. 1989.
T. Soderstrom, et al. "Identifiability conditions for linear multi-variable systems operating under feedback", IEEE Trans. on Automatic Control, vol. AC-21, No. 6, pp. 837-840, Dec. 1976.
M. Nomura, "Adaptive Optimal Control of Steam Temperature for Thermal Power plants", IEEE Trans. on Energy Conversion, IEEE/ASME Sep. 29, 1988, Joint Power Generation Conference, Philadelphia, PA.
Robert J. Bibbero, "Microprocessors in Instruments and Control", Ch.6, Development of Digital Control Algorithm, pp. 155-162, 1977.
Nisenfeld, et al., "Velocity-Control Algorithms", Instrument Society of America, pp. 204-206, 1981.
Kazuo Hiroi, "Let's Cook Digital Differentiation for Further Utilization of DCS", vol. 37 No. 8, 9, 10. Aug. to Oct., 1994, Proceedings of the 34th SICE Annual Conference, 563/564 Comparison of Digital Derivative Calculation Methods for PID Control, Jul. 27, 1995.
Yoshiyuki Yamamoto, et al. "Comparison of Digital Derivative Calculation Methods for PID Control", Proceedings of the 34th SICE Annual Conference, 563/564 Comparison of Digital Derivative Calculation Methods for PID Control, Jul. 27, 1995.
Hiroi Kazuo
Yamamoto Yoshiyuki
Kabushiki Kaisha Toshiba
Nguyen Cuong H.
Voeltz Emanuel T.
LandOfFree
Digital PID control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital PID control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital PID control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1538930