AE Research Publications
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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 ... -
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 ... -
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 ... -
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 ... -
The effect of node bond adhesive fillet on uniaxial in-plane responses of hexagonal honeycomb core
(Elsevier Ltd. All rights reserved., 2017-09-01)In the present work, experimental and numerical studies were conducted on the in-plane uniaxial behavior of a fiberglass/phenolic honeycomb core to investigate the effects of the node bond adhesive fillet. A non-linear ... -
Errors and uncertainties in derived gust velocities extracted from flight data
(American Institute of Aeronautics and Astronautics, Inc., 2017-03)Atmospheric turbulence has always posed a challenge to the designers and flyers of aircraft. Wilson [1] suggested the presence of six components in atmospheric turbulence. This was a pioneering effort at addressing the ... -
Neural network based adaptive controller for attitude control of all-electric satellites
(Univelt Inc., 2015)This paper considers the attitude control problem for an all-electric spacecraft during its transfer to the Geostationary Earth orbit. During the transfer, the spacecraft's solar arrays need to point towards the Sun, except ... -
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, ... -
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 ... -
Guidance for precision three-dimensional maneuvers through orifices using safe-passage cones
(American Institute of Aeronautics and Astronautics, 2016-06)This paper proposes a safe-passage cone-based guidance strategy developed in a relative velocity framework to enable a generic aerial robot execute a precision three-dimensional maneuver through a narrow orifice in a wall. ... -
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 ... -
Numerical-based comparison among critical flow properties of HFC-134a and its new alternatives HFO-1234yf and HFO-1234ze through short-tube orifices
(American Society of Mechanical Engineers, 2015)Although HFC-134a is a common refrigerant for residential and mobile refrigeration systems, investigators are dealing with replacing it with new alternatives because of its harmful environmental and global warming effects. ... -
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. ... -
Preliminary investigation of flight loads of single-engine air tankers
(American Institute of Aeronautics and Astronautics, Inc., 2016-03)Operational data recorded from five agricultural aircraft are used to compare their flight loads. Four of the airframes were used as single-engine air tankers, whereas the fifth was flown exclusively for agricultural ... -
MPI/Open-MP hybridization of higher order WENO scheme for the incompressible Navier-Stokes equations
(American Institute of Aeronautics and Astronautics, 2015-01)With the contemporary emerging transition for the past two decades in high performance computing (HPC) towards clusters of nodes, it is possible to obtain an efficiently scalable CFD code by hybridization of Message ... -
Numerical simulation and experimental comparison of the R12, R22 and R134a flow inside straight and coiled helical capillary tubes
(© Springer International Publishing AG, Part of Springer Science+Business Media, 2016-03)This paper presents a numerical simulation for adiabatic condition of the R12, R22 and R134a flow through straight and helically capillary tubes and also an experimental investigation of the R134a flow inside straight and ... -
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-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. ... -
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 ... -
A greedy random adaptive search procedure for multi-rendezvous mission planning
(Univelt, Inc., 2015-01)The paper proposes a new algorithm to optimize a sequence of rendezvous maneuvers by a spacecraft with multiple targets. The algorithm consists of two phases: the first phase generates feasible solutions of the problem ...
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