Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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    Characterization of aircraft electro hydrostatic actuator using virtual instrumentation
    (Institute of Electrical and Electronics Engineers Inc., 2015) Sp, K.; Desai, V.; Jeppu, Y.V.
    In Aerospace industry, implementation of Automated Test System (ATS) at the assembly and manufacturing floor improves characterization accuracy and plays a vital role to substantiate the airworthiness of the aircraft components. It is very useful in realizing high quality standards of aircraft components by virtue of meeting predefined acceptance test criteria. This paper outlines comprehensive design and development of the noise and vibration monitoring system at assembly and manufacturing floor for characterization of Electro Hydrostatic Actuator (EHA) of aircraft using progressions in virtual instrumentation. In aircraft, the flight control actuation system are powered by centralized hydraulic pumps that are driven by the aircraft engine, while the back-up system are driven by electric or ram turbines. Distributed control of electric actuators with integration of control function in Flight Control Computer (FCC) and power electronics is a cost effective approach. EHA does also play a significant role in electrical actuation system, which use distributed electric power drive in driving a hydraulic transmission system. Hence, before integrating with the primary flight control actuation systems in aircraft, EHA's are required to be subjected to noise and vibration characterization, as part of assembly and manufacturing level testing. This method is intended at replacing the monotonous and time consuming traditional method of noise and vibration characterization of the electric actuators at assembly and manufacturing floor and to improve the reliability of the electric actuation components supplied to the aircraft manufacturers. The tests have been performed using a LabVIEW controlled virtual instrument measurement system that monitored the noise and vibration waveform with reference to the tacho signal. © 2014 IEEE.
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    Remote Triggered Laboratory for Boost Converter Using LabVIEW
    (Springer Science and Business Media Deutschland GmbH, 2021) Ansal, V.; Remya, V.K.; Jagadeesh, V.K.; Krishnan, K.
    This paper aims to provide remote access to laboratories in power electronics to all levels from under graduate to research. The platform is focused on learning aspect as much as performing the experiments. Remote triggered power electronics laboratory for boost converter experiments has been developed using National Instruments(NI) data acquisition device myRIO and LabVIEW software package which has an extensive support for interfacing devices and instruments. LabVIEW software is used to access the data using myRIO which has both the processor and Field Programmable Gate Array (FPGA). Through Graphical User Interface (GUI), a user in remote location is able to vary parameter pertaining to boost converter circuit which is transmitted to laboratory PC that has NI LabVIEW installed in it. The input is further fed to circuit, and then, output is fed back to LabVIEW through NI myRIO which ultimately is returned to user’s PC using web-publishing tool and can be viewed through GUI. Remote Triggered (RT) power electronics laboratories can be effectively used to give laboratory demonstrations to large number of learners. © 2021, Springer Nature Singapore Pte Ltd.
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    Automated low-temperature resistivity measurement setup: Design and fabrication
    (Elsevier Ltd, 2021) Saw, A.K.; Channagoudra, G.; Pethker, T.; Gangadharan, K.V.; Dayal, V.
    In this paper we present, the design and working of the automated low-temperature four-probe DC electrical resistivity measurement setup developed in-house. This setup measures the resistance/resistivity in the temperature range 300 K to 80 K. The overall arrangement comprises a low-temperature four-probe sample holder, Lakeshore 335 Temperature controller, Keithley Delta mode 6221 AC/DC source, 2182A Nano-voltmeter, and a vacuum system. For the measurement of sample temperature Pt-100 sensor is employed. The IEEE-488.2 card and GPIB cables link the mentioned instruments to the computer. The licenced Lab-VIEW 2018 software is employed to build the control programme. The established setup can measure the resistance of both bulk and thin-film samples, making it versatile. A test measurement on well-characterized ceramic Pr0.67Sr0.33MnO3perovskite oxide synthesized using a solid-state route has been carried out in the newly installed setup. The data acquired from the installed setup and beforehand resistance measurement carried out in-house low-temperature resistance measurement setup at UGC-DAE-Consortium for scientific research, Indore conceded a precision for both temperature and resistance. © 2021 Elsevier Ltd. All rights reserved.