Browsing AE Research Publications by Title
Now showing items 87-106 of 182
-
Identifying elastic wave polarization and bandgaps in periodic solid media
(Elsevier Ltd, 2023-08-15)We present a new computational method to accurately identify the elastic wave propagation modes and polarizations in periodic solid structures and metamaterials. The method uses the eigenvectors associated with each ... -
Impact of launch injection error on orbit-raising of all-electric satellites
(American Institute of Aeronautics and Astronautics Inc, 2020-01-05)The effect of launch injection errors on the deployment time and deployed mass of all-electric satellites is investigated in this paper. A stochastic formulation is presented to capture the effect of uncertainties in the ... -
In-plane shear response of a composite hexagonal honeycomb core under large deformation – A numerical and experimental study
(Elsevier, 2021-07-15)In the present work, experimental shear tests using a custom-built picture-frame shear fixture have been conducted to investigate the in-plane pure-shear response of an HRP-C fiberglass/phenolic hexagonal honeycomb core ... -
In-plane thermal characterization of fiberglass/phenolic honeycomb core through an experimental-numerical approach
(DEStech Publications Inc., 2018)In the present study, a series of in-plane quasi-static tensile and compressive tests are carried out on a commercial Fiberglass/Phenolic hexagonal cell honeycomb core at elevated temperatures to investigate the high ... -
Incorporation of physics-based machining models in real-time decision making via metamodels
(Elsevier Ltd., 2017)Physics-based machining models typically require significant computational resources and time which makes them impractical for quick process optimization calculations in an industrial shop-floor setting. In this paper, we ... -
Integration of airfoil stall and compressibility models into a propeller blade element model
(American Society of Civil Engineers, 2016-07)The blade element method is an indispensible engineering design tool. It executes rapidly on a personal computer and is capable of accurate propeller performance predictions. An extensive literature survey reveals that for ... -
Introductory comparison of agricultural and single-engine air tanker operational loads
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)Flight loads of aircraft flown for agricultural applications have been compared with those flown as single-engine air tankers to assess the dependence of the load factors exerted on these airframes on the type of operation. ... -
Kalman-Filter-Based Adaptive Control: flight testing on general aviation aircraft
(American Institute of Aeronautics and Astronautics, Inc., 2017-09)Sensor noise and turbulence effects have been prevalent issues in control system design. Although a control system may respond well to “clean” input signals and commands in simulation, this may not be the case when a ... -
Kinematics analysis of the chipping process using the circular diamond saw blade
(American Society of Mechanical Engineers (ASME), 1999-05)One of the primary goals in the design of a diamond blade cutting system is to reduce the cutting force. By understanding the fundamentals of the kinematics of the sawing operation, these forces can be lowered and even ... -
Learning quantum annealing
(Rinton Press, Inc., 2017-05-01)We propose and develop a new procedure, whereby a quantum system can learn to anneal to a desired ground state. We demonstrate successful learning to produce an entangled state for a two-qubit system, then demonstrate ... -
Life of composites under variable-amplitude fatigue using ST method
(American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)The primary goal in a damage-tolerance certification program is to avoid catastrophic failure due to fatigue, corrosion, or accidental damage throughout the operational life of the aircraft. The damage-tolerance philosophy ... -
Local bending containment in sandwich panels with sub-surface core damage
(Sage, 2008-05-02)A simple repair technique to contain the local facesheet bending in sandwich panels with sub-surface core damage has been explored using experiments. The strategic filling of honeycomb cells in the damage region using ... -
Low thrust orbit-raising using non-singular orbital elements and proximity quotient approach
(Univelt, Inc., 2015)Recent years have shown a growing interest in the space industry in all-electric satellites. Mission designers analyzing the optimal deployment options for all electric satellites need to consider three important metrics: ... -
Low-frequency noise control using layered granular aerogel and limp porous media
(Institute of Noise Control Engineering, 2021-08-01)The acoustic absorption of granular aerogel layers with a granule sizes in the range of 2 to 40 μm is dominated by narrow-banded, high absorption regions in the low-frequency range and by reduced absorption values at higher ... -
Low-thrust orbit-raising trajectories considering eclipse constraints
(Univelt, Inc., 2015)Many-revolution electric orbit-raising trajectories make numerous passages through the shadow of the Earth. The paper presents a new algorithm to determine the minimum-time trajectory of the spacecraft during orbit-raising. ... -
Low-velocity impact and damage process of composite laminates
(SAGE Publications, 2002-04)Several important issues regarding damage simulation of composite laminates due to low velocity impact were investigated including contact law, damage initiation and the corresponding change of stiffness, and damping. ... -
Machine learning applied to programming quantum computers
(American Institute of Aeronautics and Astronautics, 2019-01-06)We apply machine learning to “program” quantum computers, both in simulation and in experimental hardware. A major difficulty in quantum computing is developing effective algorithms that can be programmed on a quantum ... -
Minimizing errors from linear and nonlinear weights of WENO scheme for broadband applications with shock waves
(Elsevier, 2013-03-29)Improvements in the numerical algorithm for the dynamics of flows that involve discontinuities and broadband fluctuations simultaneously are proposed. These two flow features suggest numerical strategies of a paradoxical ... -
Minimizing proton displacement damage dose during electric orbit raising of satellites
(American Institute of Aeronautics and Astronautics, 2016-04)Although electric propulsion systems have been used in deep space missions for performing interplanetary transfers, their use has primarily been restricted to station-keeping purposes for Earth-orbiting satellites. ... -
Minimum-fuel electric orbit-raising of telecommunication satellites subject to time and radiation damage constraints
(IEEE, 2014-06-04)The capability of a Geostationary satellite to perform electric orbit-raising enables the development of all-electric satellites. Key challenges to the realization of electric deployment of satellites to the Geostationary ...