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:
Dec. 05, 2017
Filed:
Feb. 26, 2014
Primetals Technologies Germany Gmbh, Erlangen, DE;
Hans-Joachim Felkl, Forchheim, DE;
Abstract
The invention relates to a hydraulic actuator () that can be controlled by a main valve () and an auxiliary valve (). Upstream of the main valve device () is a main regulator (), having a P block () and an I block (). Upstream of the auxiliary valve () is an auxiliary regulator (), having a base block () and an I block (). In a normal mode of operation, the auxiliary valve () is deactivated. The main regulator is provided with a main setpoint variable (p*) and a corresponding main actual quantity (p) of the hydraulic actuator (). The main regulator () determines a main actuating variable (s) and predefines the main actuating variable (s) in the main valve device (). In a special mode of operation, the base block () of the auxiliary regulator () is provided with an auxiliary setpoint variable (a*) and a corresponding auxiliary actual quantity (p) of the hydraulic actuator (). The base block () of the auxiliary regulator () determines an auxiliary actuating variable (s') and predefines the auxiliary actuating variable (s′) in the auxiliary valve device (). The I block () of the auxiliary regulator () is provided with the main setpoint variable (p*) and the main actual quantity (p). The I block () of the auxiliary regulator () determines an integral component (si′) therefrom. The integral component (si′) is applied to the auxiliary actuating variable (s′). In the special mode of operation, the P block () is provided with the main setpoint variable (p*) and the main actual quantity (p). In the special mode of operation, the P-block () determines the main actuating variable (s) and predefines the main actuating variable (s) in the main valve device ().