پديد آورنده :
طاهري، فرحناز
عنوان :
طراحي برداشتگر انرژي پيزوالكتريكي براي تغذيه حسگرهاي بي سيم جهت تشخيص خرابي ارابه فرود هواپيما
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
دوازده، 74ص. : مصور، جدول، نمودار
استاد راهنما :
نسرين رضايي، احمدرضا تابش
توصيفگر ها :
ارابه فرود هواپيما , پايش سلامت سازه , حسگر بي سيم , برداشتگر انرژي پيزوالكتريكي , پديده شيمي
استاد داور :
حميدرضا كارشناس، محمدصادق گلسرخي
تاريخ ورود اطلاعات :
1399/07/05
دانشكده :
مهندسي برق و كامپيوتر
تاريخ ويرايش اطلاعات :
1399/07/06
چكيده انگليسي :
Design of Piezoelectric Energy Harvesters to Supply Wireless Sensors for Fault Detection in Aircraft Landing Gear Farahnaz Taheri f taheri@ec iut ac ir August 19 2020 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree Master of Science Language Farsi Supervisors Dr Nasrin Rezaei Assist Prof n rezaei@iut ac ir Dr Ahmadreza Tabesh Assoc Prof a tabesh@cc iut ac ir AbstractMost air accidents occur during landing therefore in addition to the need for high accuracy and quality in de sign the landing gear system has the highest need for periodic maintenance and inspection to ensure the flightsafety of an aircraft Landing gear health diagnostic tests are performed annually monthly weekly and daily Before the flight the daily test is performed visually by the flight pilot Errors may occur outside of the test timeand in areas far from sight so it is necessary to detect defection of the landing gear as instantaneous and online In this research thesis wireless sensor networks are used to monitor the health of the landing gear system Sincethe main cause of the limitation in the wireless sensor network is its power source the energy harvester tech nology will be used as a suitable replacement for batteries which in addition to extending the life of wirelesssensors in the aircraft ambiance it will solve the problem of large size and short lifespan as well as the highcost of rechargeable batteries When the plane is flying the landing gear gathers in the fuselage therefore itexperiences the same vibrations of the fuselage First in this research the resonant characteristic was extractedby modeling the piezoelectric energy harvester Then by checking the vibration spectrum of a model aircraftsample it was shown that the vibration spectrum was multi frequency and under these conditions the use ofappropriate array harvester of this multi frequency spectrum will be a suitable solution to get power from thevibrations of the fuselage of the flying aircraft When the plane is landing and taking off or taxiing vibrationof the shimmy phenomenon will be a good option for receiving power therefore in the following research theshimmy phenomenon has been thoroughly studied and the factors affecting it are also checked and its frequencyspectrum will be extracted in these three modes then by changing the parameters affecting the shimmy phe nomenon the unstable conditions of this phenomenon will be provided and it is shown that the healthy Landinggear frequency Spectrum is completely different from the defective landing gear frequency spectrum This willhelp detect defection of the landing gear by studying its frequency spectrum Finally by designing a suitablepiezoelectric harvester to receive power from the shimmy phenomenon it is possible to supply power to thesensors and the processing unit without any restrictions Therefore in addition to providing electrical powerfrom the shimmy phenomenon by comparing the signals produced the defection of the landing gear will alsobe detected KeywordsLanding gear Structural Health Monitoring Wireless Sensor Piezoelectric Energy Harvester Shimmy Phe nomenon
استاد راهنما :
نسرين رضايي، احمدرضا تابش
استاد داور :
حميدرضا كارشناس، محمدصادق گلسرخي
