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  • Hybrid CubeSat constellation design for observing hurricanes 

    Chadalavada, Pardha Sai (Wichita State University, 2022-12)
    State-of-the-art weather forecasting systems depend on various data collected by airborne, orbiting, and ground sensors. Regional CubeSat constellations have the potential to improve hurricane forecasting by collecting ...
  • Trailing wake vortices: Experimental and modeling comparisons 

    Kuenn, Aaron D. (Wichita State University, 2022-12)
    Available literature has demonstrated a scarcity of data collected behind simple, academic wings that were not NACA profiles. Additionally, comparison of the simplified vortex models is typically performed piecewise without ...
  • Vortex induced vibrations: Further contributions and an energy application 

    Matheswaran, Vijay (Wichita State University, 2022-12)
    Vortex shedding and Vortex Induced Vibrations (VIV) of bluff bodies is a fundamental problem in fluid mechanics. The ubiquity of vortex shedding and VIV in several engineering fields has meant that a significant amount ...
  • Adaptive scaffolding toward transdisciplinary collaboration: Reflective polyvocal self-study 

    Alagic, Mara; Sclafani, Maria; Filbert, Nathan; Rimmington, Glyn; Demissie, Zelalem S.; Dutta, Atri; Bowen, Aaron; Lindsay, Ethan; Kuhlmann, Meghann; Rattani, Ajita; Rai, Atul (Springer International Publishing, 2022-12-16)
    Contemporary global challenges require experts from various disciplines to work together. Since every field of knowledge has its unique language and discipline-based culture, collaborative inquiry presents an additional ...
  • Tunable sound packages consisting of granular aerogels and fibrous media 

    Xue, Yutong; Sanchez-Torres, Esmeralda; Sharma, Bhisham; Bolton, J. Stuart (Institute of Noise Control Engineering, 2022-09-01)
    In this study, two granular aerogel materials, both consisting of particles with sizes on the scale of 1 to 50 mm, were first investigated both theoretically and experimentally to improve our understanding of their acoustical ...
  • Effect of particle size on sound absorption behavior of granular aerogel agglomerates 

    Dasyam, Amrutha; Xue, Yutong; Bolton, J. Stuart; Sharma, Bhisham (Elsevier, 2022-12-15)
    We investigate the sound absorption characteristics of granular aerogel agglomerates of various particle sizes. The normal incidence sound absorption coefficients of six commercially available silica aerogels with different ...
  • An adaptive flight control system for a flapping wing aircraft 

    Chandrasekaran, Balaji Kartikeyan; Steck, James E. (American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)
    In the present age of increased demand for unmanned aerial vehicles, flapping wing unmanned aerial vehicle applications have become of interest, primarily because of their ability to fly silently and at lower speeds. This ...
  • Approaches to real-time adaptive prediction of loss-of- control margins with visual cue feedback 

    Rafi, Melvin; Steck, James E.; Chakravarthy, Animesh (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 ...
  • Adaptive control for hybrid PDE models inspired from morphing aircraft 

    Menon, Alok N.; Chakravarthy, Animesh; Nguyen, Nhan T. (American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)
    This paper develops a distributed parameter model for a morphing, flexible wing aircraft with a movable trailing edge. The aircraft is modeled as a multiple component structure comprising a flexible plate, that model the ...
  • 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 ...
  • Introductory comparison of agricultural and single-engine air tanker operational loads 

    Rokhsaz, Kamran; Kliment, Linda K. (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. ...
  • Pursuit evasion games using collision cones 

    Sunkara, Vishwamithra; Chakravarthy, Animesh; Ghose, Debasish (American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)
    This paper presents a preliminary study into the use of collision cones in analyzing pursuit evasion games between two objects of arbitrary shapes. A two-player pursuit evasion game is considered, wherein a single pursuer ...
  • Exploratory investigation of next-generation airtankers 

    Kliment, Linda K.; Rokhsaz, Kamran; Nelson, John; Terning, Brett (American Institute of Aeronautics and Astronautics, 2018-01-08)
    Results are presented for fourteen airframes being flown in firefighting operations by USFS. In total, data from 2,856 flight files is presented for four BAe-146s, three RJ-85s, two MD-87s, three DC-10s, one CL-415, and ...
  • Achieving variable formation shapes for sweep operations using rendezvous cones 

    Chakravarthy, Animesh; Ghose, Debasish (American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)
    This paper proposes guidance laws to achieve and maintain different shapes of formations of UAVs in order to perform efficient sweep operations. Such sweep operations need to be performed for applications such as surveillance, ...
  • Airframe usage and operational loads of ASM/Lead aircraft in USFS service 

    Kliment, Linda K.; Rokhsaz, Kamran; Nelson, John; Terning, Brett (American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)
    Results are presented for three Beechcraft King Air models being flown in firefighting operations by USFS. Data is presented for 3,829 flights recorded on C90A, C90GT, and E90 models. For 40% of the flights, the aircraft ...
  • Adaptive control for fault tolerant autonomous carrier recovery 

    Reed, Scott; Steck, James E. (American Institute of Aeronautics and Astronautics, Inc., 2018-01-07)
    This paper presents the use of adaptive control methodologies for the recovery to an aircraft carrier of an autonomous fixed wing aircraft. The control architecture used is model reference adaptive control that is implemented ...
  • Flight loads and usage analysis of a fleet of BE-1900D commuter airliners 

    Rokhsaz, Kamran; Kliment, Linda K. (American Institute of Aeronautics and Astronautics, Inc., 2018-01-08)
    Flight data from 11,299 flights, recorded on a fleet of six BE-1900D aircraft during typical operational usage by a single commuter airline has been used for this analysis. The goal has been to quantify the airframe usage ...
  • CubeSat Formations for Monitoring Hurricanes 

    Chadalavada, Pardhasai; Dutta, Atri (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 ...
  • Mission scenario analysis for all-electric satellites 

    Sreesawet, Suwat; Dutta, Atri (American Institute of Aeronautics and Astronautics, Inc., 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 ...
  • CubeSat Formations for Monitoring Hurricanes 

    Chadalavada, Pardhasai; Dutta, Atri (IEEE, 2022-08-10)
    Recent technological advancements have enabled distributed sensing of major weather events such as hurricanes using CubeSats. This paper proposes three novel formation flying concepts of operations to improve the hurricane ...

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