Using an analytical solution of the Euler’s Elastica, we stumbled upon peculiar shapes a cantilever beam subject to large value shear follower force at free end. Intrigued by whether such existed or not, set out realise experimental apparatus validate our predictions. Attaining system, in reality, is not all trivial task. Indeed, it has represented challenge for decades, due emergence unstable ...

This paper describes a multi-objective flight control system design for flexible aircraft to take advantage of the availability of multi-functional distributed flight control surfaces to simultaneously gain aerodynamic efficiency, maneuver and gust load alleviation, and aeroservoelastic (ASE) mode suppression while maintaining traditional pilot command-tracking tasks. A multi-objective optimal ...

As wind turbines continue to grow larger, problems associated with adverse aerodynamic loads will grow more critical. Thus, the wind energy technical community has begun to seriously consider the potential of aerodynamic control methodologies for mitigating adverse aerodynamic loading. Spatial and temporal attributes of the structures and processes present in these flow fields hold important im...

--------------------------------------------------------Abstract------------------------------------------------------------Structural loads are critical for aircraft design, especially joining members of the system. Wings, they are joining with fuselage through a structural member called fairings, these fairings plays major role in aerodynamic and structural factors of the wing and fuselage sy...

The safety and operational flight envelope of helicopters carrying externally slung loads, as illustrated in Figure 1, in support of regular Army/Special Air Service (SAS) operations, is limited and sometimes seriously hindered by stability and control problems. Several incidences have been reported by the Australian Army in which possible aerodynamic excitation or dynamic instability of the sl...

This paper describes the development of transfer function models for the trailing edge and upperand lower-spoiler actuators of the Benchmark Active Control Technology (BACT) wind-tunnel model for application to control system analysis and design. A simple nonlinear least squares parameter estimation approach is applied to determine transfer function parameters from frequency response data. Unco...

The results presented in this paper apply to a generic vehicle that makes use of geometry changes to modulate the heat, drag, and acceleration loads while entering a planetary atmosphere. Two structural concepts for implementing the cone angle variation, namely a segmented shell and a corrugated shell, are presented. A structural analysis of the corrugated shell configuration shows that the str...

Aerodynamic efficiency of intermodal freight trains can be significantly improved by minimizing the adjusted gap lengths between adjacent loads. This paper first develops a static model to optimize load placement on a sequence of intermodal trains that have scheduled departure times. This model applies when full information on all trains and loads is available. Then, a dynamic model is develope...

In this study, the suspension stability of a maglev vehicle is investigated under steady aerodynamic load. The dynamics in vertical direction are modelled by considering lift and pitching moment, model adopted to investigate how load influences analysing critical speed means eigenvalue analysis direct integration. Doing so reveals three modes failure: (i) an upward or moment can give rise dynam...