The Goodrich Integrated Mechanical Diagnostics Health and Usage System (IMD-HUMS), mechanical diagnostics functionality is the integration of disparate subsystems. When the aircraft is in the appropriate capture window, the primary processing unit (PPU) commands the vibration processing unit (VPU) to capture vibration data and a tachometer reference. This time domain data is processed by standard and proprietary algorithms to generate component condition indicators (CI). These CI are statistics, which when used with a priori configuration data, are mapped into component health indicators (HI). The VPU passes the component HI data to both the PPU and the data transfer unit for ground station display. The PPU, taking the HI data for a component, can determine if the component has a degraded health state. If the component is degraded, the PPU can generate an exceedance message to be reviewed during maintenance debrief. After the flight, all CI and HI data are stored in a data base and is available for display against an aircraft, composite component (e. g. line replaceable unit) and the component itself. The acquisition process is complicated by noise from internal sources (non synchronous gears, shafts and bearing not under analysis) and external sources (changes in airspeed, torque, weight, etc). The HI becomes, in essence, a statistical indicator of the components health. As such, the best estimator of component health is calculated using a Kalman filter. This reduces variance in the data prior to display of the component HI to the aircraft operator.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mechanical Diagnostics System Engineering in IMD HUMS


    Contributors:
    Bechhoefer, E. (author) / Mayhew, E. (author)


    Publication date :

    2006-01-01


    Size :

    253755 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Integrated Mechanical Diagnostics (IMD) HUMS

    Gill, J. / Muldoon, R. / Defence Science and Technology Organisation | British Library Conference Proceedings | 1999


    Integrated Mechanical Diagnostics (IMD) HUMS

    Gill, J. / Muldoon, R. / Defence Science and Technology Organisation | British Library Conference Proceedings | 1999


    Rotor Systems Diagnostics and HUMS Extensions for Affordable CBM

    Azzam, H. / Knight, P. / AHS International | British Library Conference Proceedings | 2008


    HUMS Avionique Nouvelle

    Brand, E. / Tondre, P. | Tema Archive | 1998


    Eurocopter HUMS Concept

    Brand, E. / Farnault, B. / Deutsche Gesellschaft fur Luft-und Raumfahrt | British Library Conference Proceedings | 1995