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. 08, 1986
Filed:
Feb. 07, 1985
Arthur H Delmege, Detroit, MI (US);
Yehia El-Ibiary, Troy, MI (US);
Melvin A Rode, West Bloomfield, MI (US);
Lael B Taplin, Union Lake, MI (US);
Vickers, Incorporated, Troy, MI (US);
Abstract
An electro-hydraulic servo control system which has N dynamic state variables and includes a servo actuator adapted to variably position a load mass. An actuator control system includes sensors coupled to the actuator for providing indications of X measured state variables, such as actuator position and/or velocity, and a digital observer responsive to the X measured actuator variables for estimating the remaining N-X variables at the actuator such as velocity and/or acceleration. Signals indicative of measured and estimated state variables are fed to a comparator together with a state command signal, for obtaining a difference or error signal to provide a control input to the actuator. The observer electronics include digital computation means suitably programmed to estimate N state variables as solutions to N linear equations for N unknowns. Equation constants, which are functions of actuator and driven mass physical characteristics, are entered through operator-adjustable resistors or are down-loaded from a remote system into storage registers.