Method of and apparatus for controlling a process

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364176, 364157, 364162, 395 61, 395900, G05B 1302, F25B 4904, G05D 2319

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057268800

ABSTRACT:
The present invention relates to a method of controlling an output variable of a process having long dead times and delay times, for example for controlling the interior temperature of an absorber refrigerator, and also relates to an apparatus for carrying out such a method. The output variable of the process, such as the interior temperature, is sampled and compared with a desired value in order to determine a desired value deviation. In dependence on the determined desired value deviation, a manipulated variable, such as the power supplied to the absorber, is calculated in such a manner that the output variable of the process is brought near to the desired value. After the lapse of a waiting time, a value of the manipulated variable is newly determined. During the waiting time, the manipulated variable is not altered. The waiting time is calculated on the basis of the difference between the value of the manipulated variable and an earlier value of the manipulated variable. A controller for carrying out the method comprises a memory for an earlier calculated manipulated variable and a timer which is designed to receive the earlier calculated value of the manipulated variable and the current value of the manipulated variable, to calculate a waiting time from these and, after the lapse of this waiting time, to start a new calculation of a value for the manipulated variable.

REFERENCES:
patent: 4386397 (1983-05-01), Saeki
patent: 5241651 (1993-08-01), Ueda
patent: 5336073 (1994-08-01), Hiraoka
patent: 5371450 (1994-12-01), Hiraoka
patent: 5371832 (1994-12-01), Eichfeld et al.
patent: 5410470 (1995-04-01), Yamaoka et al.
patent: 5420785 (1995-05-01), Shinskey
patent: 5424943 (1995-06-01), Hirzle
patent: 5430642 (1995-07-01), Nakajima et al.
patent: 5513097 (1996-04-01), Gramckow et al.
patent: 5564625 (1996-10-01), Straub
patent: 5566275 (1996-10-01), Kano
patent: 5598329 (1997-01-01), Niemann
patent: 5640491 (1997-06-01), Bhat et al.
Patent Abstracts of Japan, M-1398, vol. 17, No. 198, JP 4-344078 (Apr. 19, 1993).
Patent Abstracts of Japan, M-1586, vol. 18, No. 190, JP 5-346281 (Mar. 31, 1994).
H. Eichfeld, et al., Architecture of a CMOS Fuzzy Logic Controller with Optimized Memory Organnization and Operator Design, Conference Papers of the 1st International Conference on Fuzzy Systems FUZZ-IEEE '92, pp. 1317-1323, 1992.
Watanabe, et al., A VLSI Fuzzy Logic Controller, IEEE Journal of Solid-State Circuits, vol. 25, No. 2, pp. 376-382, Apr. 1990.
Anderson, et al., A Rule-Based Adaptive PID Controller, in IEEE pp. 564-569, Jul. 1988.
H. R. Van Nauta Lemke, et al., Fuzzy PID Supervisor, in 24th IEEE Conference on Decision and Control, pp. 602-608, Dec. 1985.
Maiers and Sherif, Applications of Fuzzy Set Theory, IEEE Trans. on Systems, Man, and Cybernetics, vol. SMC-15, No. 1, pp. 175-189, Jan. 1985.
Larsen, Industrial applications of fuzzy logic control, Int. J. Man-Machine Studies, vol. 12, pp. 3-10, 1980.
Procyk, et al., A Linguistic Self-Organizing Process Controller, Dept. of Electrical Engineering; Queen Mary College, Mile End Rd., London E14NS, 1978.
Mamdani, et al., Process Control Using Fuzzy Logic, in "Fuzzy Sets--Theory & Applications to Policy Analysis & Information Sys.", New York, pp. 249-265, 1980.
Sarture, et al., Performance Criteria in Adaptive Control, in Adaptive Control Sys., A Pergamon Press Book, The MacMillan Co., New York, pp. 1-10, 1963.
Patent Abstract of EPO for DE 04226383A1, Measurement and control for electronic two-point or proportional controller, Feb. 17, 1994.
Patent Abstract of EPO for DE 03433410A1, Controller with PI behavior & with a device for improving the starting-up behavior, Mar. 20, 1986.
Patent Abstract of EPO for DE 04232826C1, Control stretch dead time measurement, Oct. 28, 1993.
Patent Abstract of EPO for DE 04237810A1, Operating microprocessor closed loop control regulator, May 13, 1993.

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