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:
Apr. 26, 2005
Filed:
Sep. 25, 2003
Kenjiro Takemura, Kanagawa, JP;
Shinji Yamamoto, Kanagawa, JP;
Nobuyuki Kojima, Tokyo, JP;
Takashi Maeno, Kanagawa, JP;
Kenjiro Takemura, Kanagawa, JP;
Shinji Yamamoto, Kanagawa, JP;
Nobuyuki Kojima, Tokyo, JP;
Takashi Maeno, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A control apparatus for a vibration type actuator is disclosed, with which at least three kinds of vibrations are excited, and a desired motion can be carried out with high efficiency. The vibration type actuator includes a rotatable moving member, an elastic member contacting the moving member, and an electro-mechanical energy conversion element exciting at least three different kinds of vibrations in the elastic member by supplying at least three periodic signals having different phases. The control apparatus includes a rotation axis determining unit, a parameter determining unit and a control circuit. The rotation axis determining unit determines a rotation axis for rotating the moving member. The parameter determining unit determines, by using an inverse model, phase and amplitude of the periodical signals.