Transient Dynamic System Behavior of Pressure Actuated Cellular Structures in a Morphing Wing

Aerospace

Christian Hühne¹  Jens Friedrichs²  Christoph Bode²  Sebastian Lück²  Tobias Spuhler²  Patrick Meyer³  Michael Sinapius³ 

[1] Institute of Composite Structures and Adaptive Systems, German Aerospace Center, Lilienthalplatz 7, 38108 Braunschweig, Germany;Institute of Jet Propulsion and Turbomachinery, Technische Universität Braunschweig, Hermann-Blenk-Straße 37, 38108 Braunschweig, Germany;Institute of Mechanics and Adaptronics, Technische Universität Braunschweig, Langer Kamp 6, 38106 Braunschweig, Germany;

关键词: pressure-actuated cellular structure;    morphing aileron;    shape variability;    transient internal flow;    computational fluid dynamics;    pseudo bond graph methodology;   

DOI  :  10.3390/aerospace8030089

来源: DOAJ

【 摘 要 】

High aspect ratio aircraft have a significantly reduced induced drag, but have only limited installation space for control surfaces near the wingtip. This paper describes a multidisciplinary design methodology for a morphing aileron that is based on pressure-actuated cellular structures (PACS). The focus of this work is on the transient dynamic system behavior of the multi-functional aileron. Decisive design aspects are the actuation speed, the resistance against external loads, and constraints preparing for a future wind tunnel test. The structural stiffness under varying aerodynamic loads is examined while using a reduced-order truss model and a high-fidelity finite element analysis. The simulations of the internal flow investigate the transient pressurization process that limits the dynamic actuator response. The authors present a reduced-order model based on the Pseudo Bond Graph methodology enabling time-efficient flow simulation and compare the results to computational fluid dynamic simulations. The findings of this work demonstrate high structural resistance against external forces and the feasibility of high actuation speeds over the entire operating envelope. Future research will incorporate the fluid–structure interaction and the assessment of load alleviation capability.

【 授权许可】

Unknown