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:
Jun. 19, 2012
Filed:
Mar. 28, 2008
Yoshiyuki Noda, Toyohashi, JP;
Kazuhiko Terashima, Toyohashi, JP;
Takanori Miyoshi, Toyohashi, JP;
Kazuhiro Ota, Shinshiro, JP;
Makio Suzuki, Shinshiro, JP;
Yoshiyuki Noda, Toyohashi, JP;
Kazuhiko Terashima, Toyohashi, JP;
Takanori Miyoshi, Toyohashi, JP;
Kazuhiro Ota, Shinshiro, JP;
Makio Suzuki, Shinshiro, JP;
Sintokogio, Ltd., Aichi, JP;
National University Corporation Toyohashi University of Technology, Aichi, JP;
Abstract
A method for controlling a ladle to pour molten metal into a mold. The method comprises producing a mathematical model describing a relationship between a measured electrical voltage supplied to a servomotor for tilting the ladle and a flow rate of the molten metal flowing out of the ladle when the ladle is tilted; solving an inverse problem of the mathematical model; estimating the flow rate of the molten metal using a state observer having an exponential damping that uses an extended Kalman filter, based on the measured electrical voltage and a weight of the molten metal poured into the mold; processing the flow rate of the molten metal and a target flow rate of the molten metal with a gain-scheduled PI controller; obtaining a target electrical voltage to be supplied to the servomotor; and controlling the servomotor based on the target electrical voltage.