Now showing items 1-20 of 182

    • Cascaded deep reinforcement learning-based multi-revolution low-thrust spacecraft orbit-transfer 

      Zaidi, Syed Muhammad Talha; Chadalavada, Pardha Sai; Ullah, Hayat; Munir, Arslan; Dutta, Atri (Institute of Electrical and Electronics Engineers Inc., 2023-08-10)
      Transferring an all-electric spacecraft from a launch injection orbit to the geosynchronous equatorial orbit (GEO) using a low thrust propulsion system presents a significant challenge due to the long transfer time typically ...
    • Additively manufactured spinodoid sound absorbers 

      Wojciechowski, Brittany; Xue, Yutong; Rabbani, Arash; Bolton, J. Stuart; Sharma, Bhisham N. (Elsevier B.V., 2023-06-05)
      Spinodoid structures, also called spinodoid metamaterials, are non-periodic cellular structures that mimic spinodal topologies that are observed during diffusion-driven phase separation processes. Computationally efficient ...
    • Multispectral deep learning models for wildfire detection 

      Haridasan, Smitha; Rattani, Ajita; Demissie, Zelalem; Dutta, Atri (CEUR-WS, 2022-07-06)
      Aided by wind, all it takes is one ember and few minutes to create wildfire. Wildfires are growing in frequency and size due to climate change. Wildfires and its consequences are one of the major environmental concerns. ...
    • Multimodal combination of text and image tweets for disaster response assessment 

      Kotha, Saideshwar; Haridasan, Smitha; Rattani, Ajita; Bowen, Aaron; Rimmington, Glyn M.; Dutta, Atri (CEUR-WS, 2022-07-06)
      Social media platforms are a vital source of information in times of natural and man-made disasters. People use social media to report updates about injured or dead people, infrastructure damage, missing or found people ...
    • 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 ...
    • Identifying elastic wave polarization and bandgaps in periodic solid media 

      Carrillo-Munoz, Maria; Sharma, Bhisham N. (Elsevier Ltd, 2023-08-15)
      We present a new computational method to accurately identify the elastic wave propagation modes and polarizations in periodic solid structures and metamaterials. The method uses the eigenvectors associated with each ...
    • 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 N.; 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 N. (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 ...