Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13087/1474
Title: LONGITUDINAL STABILITY ANALYSIS OF A UAV UNDER THE UNCERTAINTY OF TWO STABILITY DERIVATIVES
Authors: Özdemir, Uğur
Kavsaoğlu, Mehmet Şerif
Öznalbant, Zafer
Kaynak, Ünver
Keywords: Akustik
Astronomi ve Astrofizik
Biyoloji Çeşitliliğinin Korunması
Biyoloji
Kimya, Analitik
Kimya, Uygulamalı
Kimya, İnorganik ve Nükleer
Kimya, Tıbbi
Kimya, Organik
Fizikokimya
Ekoloji
Entomoloji
Çevre Bilimleri
Balıkçılık
Genetik ve Kalıtım
Limnoloji
Deniz ve Tatlı Su Biyolojisi
Matematik
Mikroskopi
Mineraloji
Mantar Bilimi
Optik
Kuş Bilimi
Fizik, Uygulamalı
Fizik, Atomik ve Moleküler Kimya
Fizik, Katı Hal
Fizik, Akışkanlar ve Plazma
Fizik, Matematik
Fizik, Nükleer
Fizik, Partiküller ve Alanlar
Spektroskopi
İstatistik ve Olasılık
Termodinamik
Taşınım
Su Kaynakları
Zooloji
Farmakoloji ve Eczacılık
Toksikoloji
Issue Date: 2018
Abstract: The longitudinal stability of an aircraft is analyzed using root locations of the transfer function’s denominator (the characteristic equation). This transfer function is obtained by linearizing aircraft dynamic model at a certain operation point (altitude and speed). However, aircraft have varying stability derivatives, therefore dynamic behavior, for different flight phases such as takeoff, cruise, and landing. Thus the stability analysis of the characteristic equation can be said to be valid only for a single flight condition. In fact, stability derivatives vary with flight conditions, so an analysis that includes all possible stability derivatives in the flight envelope is required to guarantee stability. In this study, the two most variable stability derivatives in the transfer function were taken as uncertain parameters. Gridding these two parameters to check the stability of the unmanned aerial vehicle for all possible flight conditions is a possible method, but it is very time-consuming, and it cannot assure the stability theoretically. A new simple approach is developed by using the Edge and Bialas theorems, which guarantees stability despite the uncertainty of two stability derivatives. The problem is reduced to the analysis of four polynomials. With the eigenvalues of just four polynomials, the stability characteristics of an airplane for a given flight envelope can be easily determined.
URI: https://doi.org/10.18038/aubtda.405179
https://hdl.handle.net/20.500.13087/1474
https://search.trdizin.gov.tr/yayin/detay/326919
ISSN: 1302-3160
2667-4211
Appears in Collections:Pilotaj Bölümü Koleksiyonu
TR-Dizin İndeksli Yayınlar Koleksiyonu

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