Settings

Now showing1 - 2 of 2
  • Some of the metrics are blocked by your 
    consent settings
    Item type:Publication, Access status: without files ,
    Modellbasierter Entwurf und experimentelle Validierung von elektro-mechanischen Betätigungsfunktionen für ein Bugfahrwerksystem
    (Shaker Verlag, 2016)
    Doberstein, Dennis
    ;
    Thielecke, Frank
    This thesis describes the design of a full electrical landing gear extension/retraction system for a nose landing gear. The method of multi body simulation is used for the study of new landing gear kinematics in order to analyse different electro-mechanic actuator integration variants. Another main focus is the development of a concept for the passive landing gear alternate extension (freefall). The proof of concept of the electric landing gear extension/retraction system is demonstrated on a full scale test rig. For the final conclusion, the new system is evaluated against other landing gear actuation systems. The method applied within this thesis provides design guidelines which in general may also be applicable to other electro-mechanic design processes.
    Publicationtype: Doctoral Thesis
      17
  • Some of the metrics are blocked by your 
    consent settings
    Item type:Publication, Access status: without files ,
    LPV gain-scheduling control of an electromechanically driven landing gear for a commercial aircraft
    (IEEE, 2010)
    Lüdders, Hauke Peer
    ;
    Abbas, Hossam El-Din Mahmoud Seddik
    ;
    Doberstein, D.
    ;
    Thielecke, Frank
    ;
    Werner, Herbert
    This paper presents an application of Linear-Parameter-Varying (LPV) control to an electromechanically driven landing gear of an aircraft. The LPV approach is motivated by the highly nonlinear characteristics of the kinematic. First, a nonlinear model is derived using physical modeling tools. A quasi-LPV model is then derived by using an approach which is based on linearisation and additional measurements of the nonlinear model. Using mixed sensitivity loop shaping, a polytopic LPV controller based on a single Lyapunov function is designed. Then a method is developed for this controller which compensates any wind up effects due to a reconstruction and without any further calculation. Finally the designed controller is tested and compared to a Linear-Time- Invariant (LTI) controller in simulation studies. © 2010 AACC.
    Publicationtype: Conference Paper
      22