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. 05, 1994
Filed:
Jan. 22, 1993
Yoshihiko Utsui, Amagasaki, JP;
Masahiro Tado, Amagasaki, JP;
Hidehiko Sugimoto, Amagasaki, JP;
Shunichi Wada, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An improved support apparatus such as a suspension apparatus for a vehicle is disclosed which has excellent response characteristics, can save power consumption and has excellent vibration-isolating capacity for isolating the transmission of high-frequency vibrations from a support member such as a road wheel to an object such as the body of a vehicle. To these end, in one embodiment, a linear motor is disposed between the object and the support member for telescopically supporting the object under magnetic effects. A position sensor senses the position of the object relative to a reference position. A low-pass filter filters high-frequency components of the output signal of the position sensor above a prescribed upper frequency limit. Based on the output signals of the position sensor and the low-pass filter, the current supply to the linear motor is controlled in such a manner as to offset a change in the output signal of the low-pass filter. In another embodiment, an elastic member is further disposed between the object and the support member in parallel with the linear motor for elastically supporting the object on the support member. A high-pass filter filters low-frequency components of the output signal of the position sensor below a prescribed lower frequency limit. Based on the output signal of the high-pass filter, a correction is calculated for offsetting a change in the operating force of the elastic member. The current supply to the linear motor is controlled based on a change in the output signal of the low-pass filter and the correction thus calculated.