Browsing AE Research Publications by Title
Now showing items 2-21 of 182
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A semi-analytical method for determining the strain energy release rate of cracks in adhesively-bonded single-lap composite joints
(SAGE Publications, 2007-07)A semi-analytical method for determining the strain energy release rates due to a prescribed crack in an adhesively-bonded, single-lap composite joint subjected to axial tension is presented. The field equations in terms ... -
Achieving variable formation shapes for sweep operations using rendezvous cones
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)This paper proposes guidance laws to achieve and maintain different shapes of formations of UAVs in order to perform efficient sweep operations. Such sweep operations need to be performed for applications such as surveillance, ... -
Acoustic absorption properties of granular silica aerogels
(Institute of Noise Control Engineering, 2020-10-12)Aerogels are a class of synthetic materials derived using supercritical drying to extract the liquid component of a gel and replacing it with a gas. This process results in the formation of an ultra-lightweight nanoporous ... -
Acoustic testing of the bell 699 rotor on the tiltrotor test rig (TTR) in the national full-scale aerodynamics complex 40-by 80-foot wind tunnel in conversion and airplane configuration
(Vertical Flight Society, 2020-01-21)The Tiltrotor Test Rig (TTR) provides new proprotor testing capabilities to the National Aeronautics and Space Administration (NASA) and the Department of Defense (DoD). A checkout test for the TTR with the 699 proprotor ... -
Active wing shaping control of an elastic aircraft
(IEEE, 2014-06-04)In recent years, lightweight materials have been adopted in airframe design as a means to reduce aircraft weight. These lightweight materials provide adequate strength and durability, but at the expense of reduced structural ... -
Adaptive control for fault tolerant autonomous carrier recovery
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)This paper presents the use of adaptive control methodologies for the recovery to an aircraft carrier of an autonomous fixed wing aircraft. The control architecture used is model reference adaptive control that is implemented ... -
Adaptive control for hybrid PDE models inspired from morphing aircraft
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)This paper develops a distributed parameter model for a morphing, flexible wing aircraft with a movable trailing edge. The aircraft is modeled as a multiple component structure comprising a flexible plate, that model the ... -
Adaptive control of coupled dynamical systems: a mixed state and output feedback framework
(Taylor and Francis Ltd, 2019-10-15)This paper studies a class of coupled dynamical systems consisting of an actuated dynamical system interconnected with an unactuated dynamical system. The actuated dynamical system is considered to have a measurable state ... -
Adaptive control system for flapping wing aircraft: A gain study on optimal control modification
(American Institute of Aeronautics and Astronautics, Inc., 2019-01-06)Prior work developed a model for a bird-like flapping wing aircraft using Modified strip theory for aerodynamics, a flight dynamics model based on Newtonian equations and an adaptive flight controller. This model was ... -
An adaptive flight control system for a morphing flapping wing aircraft
(American Institute of Aeronautics and Astronautics Inc, 2020-01-05)Our prior work1, 2 developed a model for a bird-like flapping wing aircraft using Modified strip theory3 for aerodynamics, a flight dynamics model4 and an adaptive flight controller. This model was simulated in MATLAB/Simulink5 ... -
Adaptive prediction of aircraft loss-of-control margins and safe control envelopes with longitudinally and laterally coupled higher-order dynamics
(American Institute of Aeronautics and Astronautics Inc, 2020-01-05)Predictive systems with the ability to warn pilots of impending entry into loss-of-control have the potential to improve safety in flight. Along these lines, research at the General Aviation Flight Lab at Wichita State ... -
Adaptive scaffolding toward transdisciplinary collaboration: Reflective polyvocal self-study
(Springer International Publishing, 2022-12-16)Contemporary global challenges require experts from various disciplines to work together. Since every field of knowledge has its unique language and discipline-based culture, collaborative inquiry presents an additional ... -
Additive manufacturing of fibrous sound absorbers
(Elsevier, 2021-05-01)We investigate the possibility of additively manufacturing fibrous sound absorbers using fused deposition modeling. Two methods for 3D printing fibers are proposed. The fiber bridging method involves extruding the filament ... -
Additively manufactured spinodoid sound absorbers
(Elsevier B.V., 2023-06-05)Spinodoid structures, also called spinodoid metamaterials, are non-periodic cellular structures that mimic spinodal topologies that are observed during diffusion-driven phase separation processes. Computationally efficient ... -
Adhesive-bonded composite joint analysis with delaminated surface ply using strain-energy release rate
(AMER INST AERONAUT ASTRONAUT, 2012-03)This paper presents an analytical model to determine the strain energy release rate due to an interlaminar crack of the surface ply in adhesively bonded composite joints subjected to axial tension. Single-lap shear-joint ... -
Airframe usage and operational loads of ASM/Lead aircraft in USFS service
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)Results are presented for three Beechcraft King Air models being flown in firefighting operations by USFS. Data is presented for 3,829 flights recorded on C90A, C90GT, and E90 models. For 40% of the flights, the aircraft ... -
Alternate method for determining yield strength of polymer additive manufacturing
(ASTM International, 2020-09-01)Additive manufacturing (AM) technology offers potential cost savings, production efficiencies, and unique design features that cannot be easily achieved through traditional manufacturing. However, it is known that the final ... -
An adaptive flight control system for a flapping wing aircraft
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)In the present age of increased demand for unmanned aerial vehicles, flapping wing unmanned aerial vehicle applications have become of interest, primarily because of their ability to fly silently and at lower speeds. This ... -
Analysis of automotive cyber-attacks on highways using partial differential equation models
(IEEE, 2018-12)This paper considers scenarios wherein a group of malicious vehicles on a highway perform a cooperative attack with the motive of creating undesirable wave effects among other vehicles on the highway. The two species of ... -
An analytical approach to characterize uniaxial in-plane responses of commercial hexagonal honeycomb core under large deformations
(Elsevier, 2019-03-01)In this article, an analytical model is derived to investigate the in-plane homogenized stress-strain relationship of an adhesively bonded commercial hexagonal honeycomb core under large deformation. The model incorporates ...