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:
Nov. 23, 1999
Filed:
Jun. 05, 1996
Katsumi Kono, Toyota, JP;
Yasushi Kobiki, Toyota, JP;
Masataka Osawa, Nagoya, JP;
Ryoichi Hibino, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-ken, JP;
Abstract
A control apparatus of the present invention can realize stable and good follow-up slip control of a plant, such as a lock-up clutch, irrespective of a characteristic perturbation of the plant, for example, deterioration of frictional members or operating oil of the clutch. The apparatus of the present invention also has an improved convergence of transient response. The control apparatus approximates a characteristic perturbation by a high-order function in a frequency domain and gives requisites for the stable and good follow-up control as a sensitivity function S and a complementary sensitivity function T of a feedback control system. Design of the feedback control system is considered as an issue of mixed sensitivity of H.infin. control. A controller is accordingly designed with a function of predetermined order, which is substantially equal to the order of the high-order function approximating the characteristic perturbation. Design of the controller also reflects the result of evaluation of the complementary sensitivity function T. When the complementary sensitivity function T has a peak in a certain frequency domain, a predetermined increment is added to a weighting function W2 in the frequency domain. The plant input, for example, the slip revolution speed of the clutch, is controlled with the controller thus designed.