Browsing AE Research Publications by Title
Now showing items 21-40 of 182
-
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 ... -
Analytical model of Van Allen proton radiation flux for trajectory optimization solvers
(Univelt, Inc., 2015)Radiation damage is a concern for electric orbit-raising of spacecraft to the Geostationary orbit because the spacecraft spends a lot of time in the Van Allen radiation belts. Trajectory optimization solvers are required ... -
Anisotropic hyperelastic constitutive modeling of fiberglass/phenolic hexagonal honeycomb core subjected to large in-plane deformations
(DEStech Publications, 2019-09)In the present study, a compressible anisotropic hyperelastic strain energy density function (SEDF) is developed to capture the in-plane nonlinear elastic responses of a commercial Fiberglass/Phenolic hexagonal cell honeycomb ... -
Anisotropic hyperelastic constitutive modeling of in-plane finite deformation responses of commercial composite hexagonal honeycombs
(SAGE Publications, 2021-02-18)This research presents the adaptation of an anisotropic hyperelastic constitutive model for predicting the experimentally observed in-plane, orthotropic, bi-modular and nonlinear-elastic responses of a commercial adhesively ... -
Approaches to real-time adaptive prediction of loss-of- control margins with visual cue feedback
(American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)Loss-of-Control events continue to be the most significant contributing factor to air accidents worldwide. Predictive systems capable of warning pilots of impending entry into a control loss event have the potential to ... -
Avoidance maps: a new concept in UAV collision avoidance
(IEEE, 2017)A new concept of avoidance map is introduced which can effectively execute collision avoidance among UAVs. It is based upon representation of the effect of control effort by pairs of UAVs on achievement of avoidance, thus ... -
Biologically motivated quantum neural networks
(IEEE, 2017)This paper presents one step toward creating the building blocks for machine intelligence that is inspired by its biological equivalent. The authors' quantum learning methods (deep quantum learning) are applied to quantum ... -
A brief survey of vortex models
(American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)Some of the many models for vortices are presented. The goal of this article is to provide the reader a brief overview of the available models and present some comparisons of the models for character, utility, and accuracy. ... -
Cascaded deep reinforcement learning-based multi-revolution low-thrust spacecraft orbit-transfer
(Institute of Electrical and Electronics Engineers Inc., 2023-08-10)Transferring an all-electric spacecraft from a launch injection orbit to the geosynchronous equatorial orbit (GEO) using a low thrust propulsion system presents a significant challenge due to the long transfer time typically ... -
Characterization of bondline thickness effects in adhesive joints
(American Society for Testing and Materials, 2002-04)Growing application of composite materials in air-frame structures tends to make significant use of bonded constructions. Despite the large work that has been done on adhesive characterization over previous years, various ... -
Collision cones for quadric surfaces
(IEEE, 2011-12)The problem of collision prediction in dynamic environments appears in several diverse fields, which include robotics, air vehicles, underwater vehicles, and computer animation. In this paper, collision prediction of objects ... -
A comparison of the two and four microphone methods for deriving the characteristic acoustic properties of porous materials
(Institute of Noise Control Engineering, 2020-10-12)The characteristic acoustic impedance and wave number of a porous material can be derived using either a two microphone or a four microphone impedance tube setup. For the four microphone method, these complex properties ... -
A comprehensive modeling of choked two-phase flow through short-tube orifices with application to alternative refrigerants HFO-1234yf and HFO-1234ze
(Elsevier Ltd., 2016-09)Due to the evaporating two-phase flow and the choked-flow condition, numerical analysis of flow through short-tube orifices is a complicated procedure. A comprehensive method for analyzing such flows is the two-fluid model, ... -
Comprehensive two fluid model simulation of critical two-phase flow through short tube orifices
(American Society of Mechanical Engineers, 2015)Small-diameter tubes are utilized widely as expansion devices in refrigeration systems. They are employed in either kinds of short-tube orifices or long capillary tubes. Performance of these tubes is reliant upon critical ... -
Constrained and unconstrained propeller blade optimization
(American Institute for Aeronautics and Astronautics, Inc., 2014-01-17)Propeller optimization by means of calculus of variations is addressed in this paper. A procedure for deriving the Euler-Lagrange equations for both unconstrained and constrained propeller blade twist optimization is ... -
Constrained and unconstrained propeller blade optimization
(American Institute of Aeronautics and Astronautics, 2015-07)Propeller optimization by means of calculus of variations is addressed in this paper. A procedure for deriving the Euler-Lagrange equations for both unconstrained and constrained propeller blade-twist optimization is ... -
Control of a flexible wing with flaps using a set theoretic active-passive framework
(American Institute of Aeronautics and Astronautics Inc., 2019-01-06)This paper develops a distributed parameter model for a multiple component structure morphing, flexible wing aircraft with a n trailing edge rigid flaps. Using a set-theoretic adaptive control approach that utilizes ... -
Coupled analysis of low-velocity impact damage and compression after impact strength of composite laminates
(American Society of Civil Engineers, 2021-09)A coupled analysis of impact damage and compression-after-impact (CAI) strength of laminated composite plates was conducted using efficient analytical and semianalytical models with the goal of demonstrating and validating ... -
Crack propagation analysis using acoustic emission sensors for structural health monitoring systems
(Hindawi Publishing Corporation, 2013)Aerospace systems are expected to remain in service well beyond their designed life. Consequently, maintenance is an important issue. A novel method of implementing artificial neural networks and acoustic emission sensors ... -
CubeSat Formations for Monitoring Hurricanes
(IEEE, 2018-01-08)In this paper, we consider the problem of orbit-raising of all-electric satellites deployed in the geosynchronous equatorial orbit (GEO). We present an optimization framework that incorporates a novel dynamic model of a ...