Robust control apparatus responsive against disturbance

Details Robust control apparatus responsive against disturbance Robust control apparatus responsive against disturbance

1985-07-08

1988-01-12

Smith, Jerry

Boots, shoes, and leggings

364151, 364160, 364162, 364163, G05B 1302

Patent

active

047195614

ABSTRACT:
A process control apparatus comprises a main controller having a first integrator for integrating a difference signal between a set point and an output of a process and a PD (proportional-derivative) arithmetic operating unit for executing the PD arithmetic operation for the output of the process. The main controller obtains a control signal on the basis of an I-PD (integral-poroportional-derivative) control method and supplying this control signal to the process. A robust controller, connected to the output of the process, comprises a high-order differentiator for high-order differentiating the output of the process, a second integrator for integrating the difference signal between the set point and the output of the process, a subtractor for subtracting an output of the second integrator from an output of the high-order differentiator, and an amplifier for amplifying an output of the subtractor and feeding back this amplified output to the control signal.

REFERENCES:
patent: 4408148 (1985-10-01), Herzog
patent: 4546426 (1985-10-01), Hafner et al.
Theory and Applications of Adaptive Control-A Survey-: Automatica, vol. 19, No. 5, pp. 471-486: K. J. Astrom (1983).
A Survey of Model Reference Adaptive Techniques: Theory and Applications, Atuomatica, vol. 10, pp. 353-379; I. D. Landau (1974).
IEEE Transactions on Automatic Control, vol. AC-23, No. 5, Oct. 1978, pp. 930-933, IEEE, N.Y., U.S.; H. G. Kwatny et al.: "On Alternative Methodologies for the Design of Robust Linear Multivariable Regulators".
IEEE Proceedings Sections A a I, vol. 131, No. 3, Part D, May 1984, pp. 103-107, Old Woking, Surrey, GB; C. S. Berger et al.: "Robust Controller Design by Minimisation of the Variation of the Coefficients of the Closed-Loop Characteristic Equation".

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