Browsing AE Research Publications by Title

Now showing items 124-143 of 182

    • Objective function weight selection for sequential low-thrust orbit-raising optimization problem 

      Dutta, Atri; Arora, Lakshay (Univelt Inc., 2019-01)
      In this paper, we consider the low-thrust orbit-raising problem formulated as a sequence of optimal control sub-problems. This formulation is helpful in rapid and robust generation of geocentric electric orbit-raising ...

    • Operational assessment of heavy air tankers 

      Rokhsaz, Kamran; Kliment, Linda K.; Nelson, John A.; Newcomb, James (American Institute of Aeronautics and Astronautics, 2014-01)
      Flight data collected by various P2V and P3A air tankers in actual operation over several seasons have been used to construct statistical information on aircraft usage and maneuver load spectra in this role. The data used ...

    • 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 ...

    • Optimal and decentralized controller designs for an elastically shaped aircraft 

      Nobleheart, Wilfred; Chakravarthy, Animesh; Nguyen, Nhan (American Institute for Aeronautics and Astronautics, Inc., 2014-01-17)
      In this paper, control design of an elastically shaped aircraft with highly flexible wings is discussed. The aircraft has the capability to actively change the wing twist and bending in flight so as to achieve a local angle ...

    • Optimal scheduling of multispacecraft refueling based on cooperative maneuver 

      Du, Bingxiao; Zhao, Yong; Dutta, Atri; Yu, Jing; Chen, Xiaoqian (Elsevier B.V., 2015-06-15)
      The scheduling of multispacecraft refueling based on cooperative maneuver in a circular orbit is studied in this paper. In the proposed scheme, both of the single service vehicle (SSV) and the target satellite (TS) perform ...

    • 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, ...

    • Overview of data-driven hazard detection research at WSU's disaster resilience analytics center for enhancing community resilience 

      Dutta, Atri (CEUR-WS, 2022-07-06)
      Early detection of hazards as well as the identification of geographical regions affected by a disaster play a substantial role in timely intervention and planning of disaster relief operations. We provide an overview of ...

    • Parallel implementation for a mhd solver with equilibrium chemistry 

      Starr, Spencer C.; Hoffmann, Klaus A. (American Institute of Aeronautics and Astronautics Inc, 2020-06-08)
      A parallel implementation for a hypersonic MHD solver was developed. The original serial code utilizes a 4th-order modified Runge-Kutta scheme with TVD to solve the MHD equations for hypersonic flow regimes. To extend the ...

    • Parametric exploration of wing-body junction flow using computational fluid dynamics 

      Hinson, Bryan C.; Hoffmann, Klaus A. (American Institute of Aeronautics and Astronautics, 2015-09)
      The wing-body junction flow is investigated parametrically using computational fluid dynamics in an attempt to understand the effects of junction flow on aircraft drag, with a focus on application to large business jet or ...

    • 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 ...

    • Perfectly matched layer boundary condition for two-dimensional Euler equations in generalized coordinate system 

      Velu, Srinivasa Perumal; Hoffmann, Klaus A. (Taylor & Francis Group, 2014-07-03)
      In the past, perfectly matched layer (PML) equations have been constructed in Cartesian and spherical coordinates. In this article, the focus is on the development of a PML absorbing technique for treating numerical ...

    • Performance metrics for tiltrotor flight dynamics during the transition regime 

      Sunkara, Vishwamithra Reddy; Nobleheart, Wilfred; Chakravarthy, Animesh (American Institute of Aeronautics and Astronautics, 2014-11)
      For control system design purposes, desirable locations of short period and phugoid poles with their respective damping factors and natural frequencies are specified for fixed-wing aircraft in U.S. Department of Defense ...

    • Piloted simulator evaluations of an adaptive loss-of-control avoidance prediction architecture and augmented-reality pilot advisory display 

      Rafi, Melvin; Schmitz, Justin; Menon, Alok N.; Ross, Robert H.; Qamar, Abbas; Steck, James E.; Chakravarthy, Animesh (American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)
      Loss-of-control in-flight has consistently been the primary contributor to air accidents worldwide. Towards mitigating aircraft loss-of-control, the General Aviation Flight Lab at Wichita State University has developed an ...

    • Precision UAV collision avoidance using computationally efficient avoidance maps 

      Tony, Lima A.; Ghose, Debasish; Chakravarthy, Animesh (American Institute of Aeronautics and Astronautics, 2018-01-08)
      This paper combines the notion of avoidance maps for collision avoidance between UAVs, proposed earlier in the literature, with requirement of the UAVs returning to their originally planned path. As the return path may ...

    • Predictive maintenance on aircraft and applications with digital twin 

      Heim, Sam; Clemens, Jason R.; Steck, James E.; Basic, Christopher; Timmons, David; Zwiener, Kourtney (IEEE, 2021-03-19)
      The concept of predictive maintenance in aiding the manufacturing and operation of equipment is moving several industries forward, allowing for a more detailed description and justification of maintenance routines. This ...

    • Preliminary examination of C-130 flight loads in aerial firefighting operations 

      Kliment, Linda K.; Rokhsaz, Kamran; Ali, Syed Junaid; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
      In-flight recorded data from two EC-130Q and two L-382G aircraft have been used to analyze their flight loads while flown as aerial firefighters. The data was collected over the calendar years 2016-2019 and consisted of ...

    • Preliminary flight loads analysis of MD-87 as a heavy airtanker 

      Rokhsaz, Kamran; Kliment, Linda K.; Nelson, John A. (American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)
      Results of analyzing in-flight recorded data from a fleet of five MD-87 airtankers flown in support of the United States Forest Service aerial firefighting operations are reported. Data has been available from two different ...

    • Preliminary investigation of flight loads of single-engine air tankers 

      Rokhsaz, Kamran; Kliment, Linda K. (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 ...

    • Preliminary usage analysis of md-87 flown as a heavy air tanker 

      Kliment, Linda K.; Rokhsaz, Kamran; Nelson, John A. (American Institute of Aeronautics and Astronautics Inc, AIAA, 2021-01)
      Operational data from a fleet of MD-87 airtankers flown in support of the United States Forest Service aerial firefighting operations have been analyzed for airframe usage. The aircraft were equipped with two different ...

    • Preliminary wind tunnel survey results for a vortex generated by a flat plate 

      Kuenn, Aaron D.; Kliment, Linda K. (American Institute of Aeronautics and Astronautics, 2022-06-20)
      Preliminary results of wingtip vortex surveys in the midfield wake of a flat plate wing of with AR = 6 at Rec between 1.7 x 105 and 2.6 x 105 are presented. Wake surveys using a conventional 7-hole probe were conducted at ...