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. 13, 1998
Filed:
Sep. 20, 1996
Naoki Matsumoto, Aichi-ken, JP;
Manabu Otsuka, Aichi-ken, JP;
Koji Ogusu, Oobu, JP;
Takahisa Kaneko, Okazaki, JP;
Takaharu Idogaki, Okazaki, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
Control units U.sub.i-1, U.sub.i and U.sub.i+1, each having a piezoelectric actuator 3, are aligned on a resilient substrate 1 at predetermined intervals, so as to constitute a united control system. An actuator controller, formed on a circuit substrate 4 of control unit U.sub.i, receives target displacements of neighboring other control units U.sub.i-1 and U.sub.i+1. Then, using a discrete difference equation derived from the partial differential equation describing the distributed parameter system model of the united control system, the displacement amount of control unit U.sub.i can be determined based on the target displacement of the control unit U.sub.i and the target displacements of the neighboring other control units U.sub.i-1 and U.sub.i+1 thereby driving piezoelectric actuator 3 smoothly.