Showing papers in "Aerospace Science and Technology in 2013"

TL;DR: In this paper, a refined trigonometric shear deformation theory (RTSDT) is presented for the thermoelastic bending analysis of functionally graded sandwich plates, where the displacement components are expressed by trigonometrical series representation through the plate thickness to develop a two-dimensional theory and gives rise to transverse shear stress variation.

TL;DR: It is shown that the gradient-enhanced GHBF proposed in this paper is very promising and can be used to significantly improve the efficiency, accuracy and robustness of VFM in the context of aero-loads prediction.

TL;DR: In this article, a review of those technologies which show a potential to deliver breakthrough improvements in the aerodynamic performance of the aircraft is shown, focusing on new aircraft configurations to reduce induced drag and noise, laminar and turbulent drag reduction technologies and flow control devices.

TL;DR: In this paper, a cycle analysis model for an airbreathing, rotating detonation wave engine (RDE) is presented, which consists of a steady inlet system with an isolator which delivers air into an annular combustor.

TL;DR: In this article, a guidance law with finite time convergence is designed based on target-missile relative motion equations, which is rigorously proved that states of the guidance system converge to a sliding-mode in finite time and the line-of-sight (LOS) angular rate converges to zero in finite-time under the proposed guidance law.

TL;DR: In this article, a light UAV was designed, constructed and tested in flight, which is equipped with first person view (FPV) systems for easier and more accurate control by a remote user.

TL;DR: In this article, a new spacecraft thermal control hardware composed of two parallel channels working for heat pipe (HP) and solid-liquid phase change material (PCM), respectively, is suggested for the high heat dissipating component which works intermittently with short duty.

TL;DR: In this article, a control-oriented uncertainty model is established for the feedback linearization design, and the multi-input and multi-output (MIMO) quasi-continuous high-order sliding mode (HOSM) controller is formulated to track the responses of the vehicle to a step change in velocity and altitude based on full state feedback.

TL;DR: In this paper, a robust adaptive Kalman filter (RAKF) is proposed to adapt itself against sensor/actuator faults. But the performance of the proposed RAKF is investigated by simulations for the state estimation procedure of an Unmanned Aerial Vehicle.

TL;DR: In this paper, the authors investigated the terminal guidance problem for missiles intercepting maneuvering targets with terminal impact angle constraints and developed guidance laws based on integral sliding mode control (ISMC) method technique.

TL;DR: In this paper, the attitude and vibration control of spacecraft containing flexible appendages is investigated, which consists in connecting piezoelectric transducers bonded to the flexible elements to electric circuits in such a way that the vibration energy, once converted into electrical energy, is transferred and partially dissipated into the electric circuit.

TL;DR: In this paper, continuous fiber reinforced functionally graded composites (FGCs) have been prepared using quartz fabric reinforcement for thermo-structural aerospace application, where silicone resin and fused silica powder have been used to obtain graded matrix.

TL;DR: In this paper, the regenerative cooling of a liquid propellant rocket engine has been numerically simulated to operate on a LOX/kerosene mixture at a chamber pressure of 60 bar with 300 kN thrust and kerosene is considered as the coolant.

TL;DR: In this article, an analytical model approximating the dynamic response about each statically stable shape of wing-shaped bi-stable composites is derived, and theoretical modal properties are obtained to attain or stabilise a desired configuration following a previously introduced resonant control strategy.

TL;DR: Based on the logarithm of dual quaternion, a model-independent PD-like controller is proposed for spacecraft tracking control problem in this article, where the convergence of the closed loop system in the presence of external disturbances is proven theoretically.

TL;DR: In this paper, a coupled thermal-structural analysis based on the Euler-Bernoulli beam model is conducted within a framework of Absolute Nodal Coordinate Formulation. But the model is not suitable for modeling large flexible space structures.

TL;DR: In this paper, a backstepping based adaptive sliding mode control (B-ASMC) strategy is proposed as a solution, where the upper bounds of the parametric uncertainty and disturbance are not required for the controller design.

TL;DR: In this article, the vortical flow originated from the tip of a NACA 0012 rectangular wing and was described in its initial formation and development over a rounded and a squared tip.

TL;DR: In this paper, the buckling behavior of thin-walled GFRP cylindrical shells with triangular lattice patterned reinforcements formed by helical and circumferential ribs under axial force is analyzed.

TL;DR: In this article, an active cable is constructed by incorporating a PZT actuator into flexible cables, and the shape adjustment method is proposed to find the optimal actuation voltages for the desired shape.

TL;DR: In this article, a nonlinear robust control strategy is developed for 6DOF Reusable Launch Vehicles (RLV) which is nonlinear, multivariable, strong coupling, and includes uncertain parameters and external disturbances.

TL;DR: In this paper, a dynamic hybrid algorithm is developed to solve the motion planning problem in real-time using a heuristic optimization approach, which combines desired features such as rapid convergence to an optimal path with reduced computational effort.

TL;DR: In this paper, the impact of the size and location of the ramp on the wall pressure profiles in the transverse slot injection flow field has been investigated numerically, and the influence of the incident shock wave and the injection has been analyzed.

TL;DR: In this paper, the authors investigated the effects of using a small number of large engines with a moderate number of small engines and ducting part of the engine exhaust to exit out along the trailing edge of the wing.

TL;DR: In this article, the scale effect of solid fuel regression rate in hybrid rocket motors is investigated theoretically based on pipe turbulent boundary combustion theory, and a practicable scaling criterion of solid-fuel regression rate has been obtained.

TL;DR: In this article, a new analytical derivation of the so-called airfoil effective distance parameter and a new advanced load estimation approach have been developed, which allow achieving a higher level of accuracy and design sensitivity than any other similar method found in literature.

TL;DR: In this paper, a bird model with geometry similar to a real bird (Bufflehead Duck) is introduced and compared to traditional bird models and also to experimental data. But, since all birds do not have the same body shapes and sizes, and since it is not always convenient to model a complex bird body, four substitute bird models are introduced.

TL;DR: In this article, the reliability-based multidisciplinary design optimization of a two-stage solid propellant expendable launch vehicle (LV) is investigated, where propulsion, weight, aerodynamics (geometry) and trajectory (performance) disciplines are used in an appropriate combination.

TL;DR: In this paper, the Zigzag wingbox concept is proposed to allow the wing span to be varied by 22% (22% extension and 22% retraction) for a medium altitude long endurance (MALE) UAV.

TL;DR: In this paper, the analysis of dynamic deflection and stresses in functionally graded (FG) plates resting on two-parameter elastic foundations, according to Pasternak's model, is investigated.