A method of health monitoring of a hydraulic actuator includes sensing a first hydraulic fluid pressure at a first chamber of a hydraulic cylinder, the first chamber defined by a piston disposed in the cylinder and a first cylinder wall. The method further includes sensing a second hydraulic fluid pressure at a second chamber of the hydraulic cylinder, the second chamber defined by the piston and a second cylinder wall opposite the first cylinder wall. The pressures are summed to derive a pressure sum leakage estimate. An actual piston position in the hydraulic cylinder is determined and compared to an intended piston position to determine a positional error of the piston. A command-response error leakage estimate is derived from the positional error. The pressure sum leakage estimate and the command-response error leakage estimate are fused to determine an internal hydraulic fluid leakage in the hydraulic cylinder.


    Access

    Download


    Export, share and cite



    Title :

    SYSTEM AND METHOD FOR HEATLH MONITORING OF SERVO-HYDRAULIC ACTUATORS


    Additional title:

    SYSTEM UND VERFAHREN ZUR GESUNDHEITSÜBERWACHUNG VON SERVOHYDRAULISCHEN AKTUATOREN
    SYSTÈME ET PROCÉDÉ POUR LA SURVEILLANCE DE L'ÉTAT DE VÉRINS SERVO-HYDRAULIQUES


    Contributors:

    Publication date :

    2018-01-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / G01F Messen des Volumens, des Durchflussvolumens, des Massendurchflusses oder des Füllstandes , MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen



    Model-Based Real-Time Fault Monitoring Strategy for Hydraulic Servo Actuators

    Yan, Zhiming / Fu, Jian / Ge, Zehua | Springer Verlag | 2024


    Servo actuators

    COLLINS ANDREW JOHN | European Patent Office | 2019

    Free access

    SERVO ACTUATORS

    COLLINS ANDREW JOHN | European Patent Office | 2018

    Free access


    The importance of LVDT calibration on servo hydraulic actuators

    Meyer,K. / Horiba,JP | Automotive engineering | 2009