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. 21, 2007
Filed:
Jan. 18, 2007
Yasunao Okazaki, Shiga, JP;
Masaki Yamamoto, Nara, JP;
Yuji Adachi, Osaka, JP;
Katsuhiko Asai, Nara, JP;
Yasunao Okazaki, Shiga, JP;
Masaki Yamamoto, Nara, JP;
Yuji Adachi, Osaka, JP;
Katsuhiko Asai, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An internal pressure of a hydropneumatic drive actuator is measured by a pressure measurement device, a displacement amount of a movable mechanism is measured, a desired value and a measurement value of the displacement are inputted so that a position error is compensated by a position error compensation device, a desired value of a pressure difference of the actuator to which antagonistic driving is performed by the desired value is calculated by a desired pressure difference calculation device, outputs from the position error compensation device, the desired pressure difference calculation device, and the pressure measurement device are inputted, and a pressure difference error is compensated by pressure difference error compensation device.