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:
Oct. 23, 2007
Filed:
Jul. 25, 2002
Hirofumi Tatsukawa, Tokyo, JP;
Hirofumi Tatsukawa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A positioning control apparatus includes a position detectorwhich detects the position of a positioning object, a target position generatorwhich generates a target position signal based on an output from the position detector, and a driving unitwhich drives the positioning object based on an output from the target position generator. The target position generatorincludes a control unit which sets a temporary target position of the positioning object and performs the learning of a reference position of the positioning object. A control gain given to the driving unit includes a first control gain, which is valid until the positioning object reaches the set temporary target position, and a second control gain, which is smaller than the first control gain and which is valid after the time when the positioning object has reached the temporary target position until the reference position learning is completed.