Method to determine internal leakage of aircraft's hydraulic servo

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


    This paper addresses a method to determine possible internal hydraulic leak of airplane control servo. Internal hydraulic leakage is difficult to perceive due the leak doesn’t have any visible evidence outside the control servo. Leaking happens past the hydraulic piston or through faulty control valves. Such leaking can have serious consequences due servo’s decreased capacity and force especially situations where all the aerodynamic force of control surface is needed to maintain the ability to control the airplane. This kind of hidden failure can advance unobserved because decreased capacity of the servo can be enough to keep the airplane in control during normal flight conditions. However, in heavy flight manoeuvres such as aerobatics, the decreased rate of control surface’s angular velocity can lead to in-flight loss of control.
    One relevant problem is how to find out when inner leakage is so severe, that it endangers safety of the airplane. To solve this kind of problem, a detailed quantitative model has been built. This model utilizes recorded in-flight process data and aircraft’s aerodynamical characteristics to determine condition of the control servo.
    Original languageEnglish
    Title of host publication12th World Congress on Engineering Asset Management & 13th International Conference on Vibration Engineering and Technology of Machinery
    Subtitle of host publication(WCEAM 2017) 2-4, August 2017, Brisbane, Australia.
    EditorsJ. Mathew, C. W. Lim, L. Ma, D. Sands, M. E. Cholette, P. Borghesani
    Number of pages7
    ISBN (Electronic)978-3-319-95711-1
    Publication statusPublished - 2018
    Publication typeA4 Article in conference proceedings
    EventWorld Congress on Engineering Asset Management -
    Duration: 1 Jan 1900 → …

    Publication series

    NameLecture Notes in Mechanical Engineering
    ISSN (Electronic)2195-4356


    ConferenceWorld Congress on Engineering Asset Management
    Period1/01/00 → …


    • airplane
    • hydraulic control servo
    • hydraulic cylinder
    • inner leakage

    Publication forum classification

    • Publication forum level 1


    Dive into the research topics of 'Method to determine internal leakage of aircraft's hydraulic servo'. Together they form a unique fingerprint.

    Cite this