The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 1996
Filed:
Jun. 02, 1994
Kazuo Hiroi, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A system for controlling a process system with a process system gain and dead time of which its transfer function includes a gain term element corresponding to the process system gain and a dead time term element corresponding to the dead time, subject to an external disturbance, by adjusting a control variable output by the process system to a target value according to a manipulated variable output by a controller performing at least proportional and integral control operations based on a deviation between the control variable and the target value. The system includes dead time compensation unit, connected to the controller, including a system model unit having a system transfer function approximative to the transfer function of the process system and a model unit having a model transfer function resulting from eliminating the dead time term element from the system transfer function, for outputting a compensation output signal to compensate the dead time, and gain adjustment unit, connected to the dead time compensation means, for adjusting a gain of the system model unit to the process system gain according to the variation in the process system gain of the process system.