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  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, 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 ...
  • Fracture toughness of DCB interlaminar 3D printed unidirectional polylactide acid tasks 

    Almutiri, Khaled S. (Wichita State University, 2022-05)
    The work in this thesis paper quantifies the mechanical property, fracture toughness (GIC), of 3D printed polylactide acid (PLA) specimens. The established data of fracture toughness were obtained using the DCB method for ...
  • 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 ...
  • Flight loads analysis of CL-415 scoopers 

    Rokhsaz, Kamran; Kliment, Linda K.; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    Flight data recorded between 2015 and 2019 on a fleet of four CL-415 aircraft has been analyzed for the purpose of developing flight loads spectra. A low-pass filter has been used to remove the effects of local and structural ...
  • Examination of derived gust velocities from C-130 in forest service operation 

    Kliment, Linda K.; Rokhsaz, Kamran; Ali, Syed Junaid; Nelson, John A. (American Institute of Aeronautics and Astronautics, Inc., 2022-06-20)
    Flight data from two EC-130Q and two L-382G airframes being flown as airtankers in USFS operations were analyzed. Firefighting flights were separated into five phases: cruise 1, entry, drop, exit, and cruise 2. The recorded ...
  • 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 ...

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