Browsing by Author "Kumar, B.P."

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    Development of Voice Activated Ground Control Station
    (2016) Rahul, D.K.; Veena, S.; Lokesha, H.; Vinay, S.; Kumar, B.P.; Ananda, C.M.; Durdi, V.B.
    This paper chronicles the development of Automatic Speech Recognition (ASR) system that can be integrated to Ground Control Station (GCS) of MAVs to achieve voice activation. The first part of the paper highlights the nature of aerospace speech signals and hence the issues to be considered while designing a voice activated aerospace application. The second part describes the development and integration of an ASR capability to the GCS. � 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
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    Development of Voice Activated Ground Control Station
    (Elsevier B.V., 2016) Rahul, D.K.; Veena, S.; Lokesha, H.; Vinay, S.; Kumar, B.P.; Ananda, C.M.; Durdi, V.B.
    This paper chronicles the development of Automatic Speech Recognition (ASR) system that can be integrated to Ground Control Station (GCS) of MAVs to achieve voice activation. The first part of the paper highlights the nature of aerospace speech signals and hence the issues to be considered while designing a voice activated aerospace application. The second part describes the development and integration of an ASR capability to the GCS. © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
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    Freeze casting of lamellar-structured porous lead-free (Na0.52K0.48)(Nb0.95Sb0.05)O3 piezoceramic with remarkable enhancement in piezoelectric voltage constant and hydrostatic figure of merit
    (Springer, 2021) Dixit, P.; Seth, S.; Rawal, B.; Kumar, B.P.; Panda, H.S.
    The study reports the development of lamellar-structured, porous lead-free (Na0.52K0.48)(Nb0.95Sb0.05)O3 ceramics, abbreviated as NKNS, using the freeze-casting method with water as pore-forming agent. The effect of directional porosity on the microstructure, dielectric, and piezoelectric properties of the lead-free porous material is investigated. Furthermore, the effects of conventional and microwave sintering on microstructure and piezoelectric properties have also been analyzed. In addition, the study compares conventional and corona poling too. The results depicted no deterioration of piezoelectric properties (d33:130 pC/N), despite being ~ 50% porosity, along with reasonably good hydrostatic piezoelectric strain coefficient (dh: 60pC/N). The samples exhibited hydrostatic piezoelectric voltage coefficient (gh) of 58.70 mV.m/N providing a significant value of the hydrostatic figure of merit (HFOM = dh?gh: 3522 × 10–15 Pa?1) for the porous NKNS ceramic which is nearly 39 times more than the dense ceramic. Considering its unique advantages such as environmental friendly, less dense, wide performance range with enhanced figure of merit, the lamellar-structured NKNS ceramic is a promising material for sensor and transducer applications. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.