Recent Submissions

  • Numerical assessment of pulsatile flow through diverging tees with a sharp- and round-edge junction 

    Kok, Foo; Myose, Roy Y.; Hoffmann, Klaus A. (Elsevier, 2019-04)
    Unsteady flow through diverging tees is of interest in many industrial systems and physiological applications. In this study, the characteristics of the transient flow behaviors at the junctions of diverging tees with ...
  • In-plane thermal characterization of fiberglass/phenolic honeycomb core through an experimental-numerical approach 

    Shahverdi Moghaddam, Hooman; Keshavanarayana, Suresh R.; Kothare, Akash; Teoh, Ping; Yang, Charles; Horner, Allison L. (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 ...
  • Analysis of automotive cyber-attacks on highways using partial differential equation models 

    Ghanavati, Meysam; Chakravarthy, Animesh; Menon, Prathyush P. (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 

    Yang, Charles; Shahverdi Moghaddam, Hooman; Keshavanarayana, Suresh R.; Horner, Allison L. (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 ...
  • An overview of Cube-Satellite propulsion technologies and trends 

    Tummala, Akshay Reddy; Dutta, Atri (MDPI Multidisciplinary Digital Publishing Institute, 2017-12-09)
    CubeSats provide a cost effective means to perform scientific and technological studies in space. Due to their affordability, CubeSat technologies have been diversely studied and developed by educational institutions, ...
  • Fast and robust computation of low-thrust orbit-raising trajectories 

    Sreesawet, Suwat; Dutta, Atri (American Institute of Aeronautics and Astronautics, Inc. Read More: https://arc.aiaa.org/doi/10.2514/1.G003319, 2018-09)
    This paper presents a new dynamic model of a thrusting spacecraft, and the model is used for computing low-thrust orbit-raising trajectories to the geosynchronous equatorial orbit. Low-thrust orbit raising is a challenging ...
  • A novel methodology for fast and robust computation of low-thrust orbit-raising trajectories 

    Sreesawet, Suwat; Dutta, Atri (Univelt, Inc., 2017)
    All-electric spacecraft makes numerous revolutions during the orbit-raising to the geosynchronous equatorial orbit. This paper presents a new mathematical formulation to describe the dynamics of the spacecraft under the ...
  • De-orbit time of on-orbit debris for laser-based removal methods 

    Karampudi, Prathyusha; Dutta, Atri (Univelt, Inc., 2017)
    The amount of space debris in the near-Earth space environment poses a major challenge for current and future space missions. Controlling the growth of on-orbit debris utilizing on-orbit debris removal missions is of great ...
  • Demand-side energy management by use of a Design-then-Approximate controller for aggregated thermostatic loads 

    Ghanavati, Meysam; Chakravarthy, Animesh (IEEE, 2018-07)
    This brief presents a method to design a controller for a system of aggregated thermostatically controlled loads (TCLs) that are represented by two coupled partial differential equations-the Fokker-Planck equations. The ...
  • Biologically motivated quantum neural networks 

    Unknown author (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 ...
  • PDE-based analysis of automotive cyber-attacks on highways 

    Ghanavati, Meysam; Chakravarthy, Animesh; Menon, Prathyush P. (IEEE, 2017-05)
    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 ...
  • A decentralized adaptive control architecture for large-scale active-passive modular systems 

    Gruenwald, Benjamin C.; Arabi, Ehsan; Yucelen, Tansel; Chakravarthy, Animesh; McNeely, Drew (IEEE, 2017-05)
    Decentralized control of large-scale active-passive modular systems is considered. These systems consist of physically interconnected and generally heterogeneous modules, where local control signals can be only applied to ...
  • Avoidance maps: a new concept in UAV collision avoidance 

    Tony, Lima Agnel; Ghose, Debasish; Chakravarthy, Animesh (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 ...
  • Real-time Google Glass Heads-Up Display for rapid air-traffic detection 

    Rafi, Melvin; Chandrasekaran, Balaji K.; Kusmez, Bill; Steck, James E.; He, Jibo (American Institute of Aeronautics and Astronautics, Inc., 2018-01)
    As airspace becomes increasingly crowded, the need for next-generation traffic-advisory systems for pilots has become more crucial. To this end, a heads-up advisory display is developed within the Google Glass platform to ...
  • A numerical investigation of the onset of flow separation in round-edge diverging tees 

    Kok, Foo; Myose, Roy Y.; Hoffmann, Klaus A. (ASME, 2018-03)
    The onset condition of flow separation in diverging tee junctions was investigated numerically. Flow separation and recirculation at the proximal region of a bypass graft can contribute to early phase graft failure in ...
  • Optimal aircraft trajectories for wind energy extraction 

    Zhao, Yiming; Dutta, Atri; Tsiotras, Panagiotis; Costello, Mark (American Institute of Aeronautics and Astronautics, Inc., 2018-02)
    It is well known that birds and air vehicles are capable of extracting energy from atmospheric winds. Land birds such as condors and vultures remain aloft for hours at a time without flapping their wings. In straight and ...
  • Examination of Derived Gust Velocities from a Fleet of Aerial Supervision Module/Lead Aircraft 

    Rokhsaz, Kamran; Kliment, Linda K.; Menon, Alok N. (American Institute of Aeronautics and Astronautics, Inc. Read More: https://arc.aiaa.org/doi/10.2514/1.C033991, 2017-09)
    Flight data collected from a fleet of Beechcraft King Air airframes have been analyzed. The data consisted of information from 3094 flights in various missions flown for the U.S. Forest Service. The missions consisted of ...
  • Incorporation of physics-based machining models in real-time decision making via metamodels 

    Sharma, Bhisham N.; Harikrishnan, Rishab V.; McCrorie, Stuart B.; Conner, Marc C.; Salahshoor, Meisam; Deshmukh, Abhijit V.; Sangid, Michael D. (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 

    Rafi, Melvin; Steck, James E.; Watkins, John Michael (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 

    Keshavanarayana, Suresh R.; Ghimire, Ritesh (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 ...

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