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:
Jan. 09, 2024
Filed:
Mar. 07, 2019
Polight Asa, Horten, NO;
Lars Henriksen, Tønsberg, NO;
Tore Svortdal, Horten, NO;
Euan Barron, Nairn, GB;
Muhammad Asif Raza Azhar, Tampere, FI;
Thi Kim Trinh Tran, Undrumsdal, NO;
Nicolas Tallaron, Lyons, FR;
Pierre Craen, Embourg, BE;
Polight ASA, Horten, NO;
Abstract
The invention relates to a method and an actuator system for determining and applying a voltage to a piezoelectric actuator (PEA) to achieve a given setpoint displacement. The method involves determining a relation d(V) between a PEA displacement measure (d) and voltage (V) and a relation tt(V) between transition time (tt) and voltage and combining the determined relations to calculate a relation d(tt) between the displacement measure and transition time during an initial calibration procedure. This relation is characteristic for the PEA, and by determining a new relation tt(V) after repeated biasing of the PEA, a compensated relation d(V) can be calculated by substituting tt(V) in the calculated d(tt). The compensated relation d(V) compensates for piezo creep effects due to the wear and can be used to determine the voltage to be applied directly, or be used in other compensation algorithms.