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. 30, 2011
Filed:
Nov. 18, 2008
Takao Akiyama, Takasaki, JP;
Yoshimasa Sawada, Konosu, JP;
Masayasu Kanke, Kumagaya, JP;
Meidensha Corporation, Tokyo, JP;
Abstract
It is a challenge to make it possible to produce a resonance suppression effect, and perform a stable control even in a case where a spring rigidity of a shaft significantly varies. The challenge is achieved as follows. In an engine bench system in which an engineto be tested and a dynamometerare coupled together by a coupling shaft, and a shaft torque control of the dynamometer is performed, a controllerincludes: an integral element having an integral coefficient Kfor a deviation (T12r−T12) between a shaft torque command T12r and a measured shaft torque T12; a differential element having a differential coefficient Kfor the measured shaft torque T12; and a proportional element Kfor the measured shaft torque T12. The controllerobtains a torque control signal T2 by subtracting the differential element and the proportional element from the integral element. Control parameters (K, K, K, f) are determined according to control characteristic parameters (a4, a3, a2, a1) set in a function calculation section, inertia moments J1, J2 of the engine and the dynamometer, and spring rigidity K12 of the coupling shaft.