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. 14, 2009
Filed:
Jan. 05, 2007
Qinghui Yuan, Maple Grove, MN (US);
Christy W. Schottler, Brooklyn Park, MN (US);
Jae Y. Lew, Shorewood, MN (US);
Qinghui Yuan, Maple Grove, MN (US);
Christy W. Schottler, Brooklyn Park, MN (US);
Jae Y. Lew, Shorewood, MN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A method for estimating actuator position includes the steps of receiving fluid pressure data signals from a plurality of fluid pressure sensors (), receiving spool position signals from at least one spool position sensor (), and receiving actuator position data signals from at least one actuator position sensor (). Corrected flow rates to and from an actuator () are determined with each corrected flow rate being based on fluid pressure data signals, the spool position signals, and an error-correction factor, wherein the error-correction factor is a function of the fluid pressure data signals and the spool position signals. An estimated actuator position is determined wherein the estimated position includes a kinematic component and a dynamic component. Adaptive gain factors are applied to calibrate the estimated actuator position to the actuator position data signals from the actuator position sensor.