Control system and method for controlling plant having high orde

Details Control system and method for controlling plant having high orde Control system and method for controlling plant having high orde

1988-09-21

1990-06-12

Myracle, Jerry W.

Measuring and testing

Gas analysis

With compensation detail

73116, G01N 2712

Patent

active

049322389

ABSTRACT:
A control system has a controlled element, such as an element for sensing an air/fuel ratio of an internal combustion engine, having a high order lag, a controller element connected with the controlled element to form a closed path, and a third element connected with the controlled element and controller element for modifying an output signal of the controlled element in accordance with an output signal of the controller element so that a phase angle in a frequency response of a loop transfer function of the controlled and controller elements does not reach -180.degree..

REFERENCES:
patent: 4033170 (1977-07-01), Kawamura et al.
patent: 4298573 (1981-11-01), Fujishiro
patent: 4570479 (1986-02-01), Sakurai et al.
patent: 4796587 (1989-01-01), Nakajima et al.
patent: 4803866 (1989-02-01), Miki et al.

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