A triplex pneumatic architecture system is disclosed having first, second, and third pneumatic subsystems where triplex redundancy may be accomplished by measuring only one particular node in each system, such as a measured current of the servo valve. Each of the first, second, and third pneumatic subsystems are configured to control a separate redundant pneumatic actuation assembly. Each subsystem may comprise a current sensor to measure a control current from a servo driver to a servo valve that controls the pneumatic actuation assembly to output a measured current value, and a dump valve coupled to a relay. Each processor is configured to generate a termination signal to actuate the first relay to open the first dump valve. The triplex pneumatic architecture system further includes a communication bus to communicatively couple each of the first, second, and third pneumatic subsystems. Each processor is configured to generate the termination signal and to communicate the termination signal to one or more of the relays when one measured current value deviates from the two other measured current values by a predetermined error value.


    Access

    Download


    Export, share and cite



    Title :

    Pneumatic actuation systems having improved feedback control


    Contributors:

    Publication date :

    2019-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



    PNEUMATIC ACTUATION SYSTEMS HAVING IMPROVED FEEDBACK CONTROL

    MATTHEW G HUTCHISON / WILLIAM BOSWORTH / ANDREW KEHLENBECK et al. | European Patent Office | 2019

    Free access

    PNEUMATIC ACTUATION SYSTEMS HAVING IMPROVED FEEDBACK CONTROL

    HUTCHISON MATTHEW G / BOSWORTH WILLIAM / KEHLENBECK ANDREW et al. | European Patent Office | 2020

    Free access

    Development of Advanced Electro-Pneumatic Actuation Systems

    S. Hyman / P. T. Lane / P. H. Stahlhuth | NTIS | 1972


    A Controlled Pneumatic Actuation System

    Hadeler, Theodore T. / Carey, Thomas P. | SAE | 1965


    Electro-Pneumatic Control Valve for EGR/ATC Actuation

    Mayer,E.A. / Bendix,US | Automotive engineering | 1981