Stability analysis for an UAV model in a longitudinal flight
Journal Title: INCAS BULLETIN - Year 2017, Vol 9, Issue 4
Abstract
The paper presents the stability analysis of the equilibria in a longitudinal flight of an unmanned aircraft with constant forward velocity. The motion of the aircraft is described using delay differential equations with constant delays, the delay being considered in flight control compartment. The goal is to study the effects of the delays for the stability of the equilibrium points. It is eventually proved that a Hopf bifurcation appears.
Authors and Affiliations
Ana-Maria BORDEI, Andrei HALANAY
An application to calculate the factors which are used to determine the tensile rupture load of a lug under axial, transverse or oblique loading
This work describes a computer application to calculate the values of the factors which are used to determine the tensile rupture load of a lug under axial, transverse or oblique loading. It can be used as a procedure fo...
Single European Sky – the transformation of the aviation industry based on the dynamic capabilities
Each year the demand of aviation services is increasing but the European airspace is still fragmented according to national borders. Delays of implementing Single European Sky are increasingly high. Consequently, each ye...
Aerodynamic Interference between Oscillating Lifting Surfaces and Fuselage Part 5: A Panel Method for Non-Lifting Bodies
In the fifth article of our series we will deal with the calculation of the unsteady aerodynamic forces on non-lifting bodies. We present here a contribution to the problem of the flow about non-lifting bodies. It is a p...
A computational methodology for a micro launcher engine test bench using a combined linear static and dynamic in frequency response analysis
This article aims to provide a quick methodology to determine the critical values of the forces, displacements and stress function of frequency, under a combined linear static (101 Solution - Linear Static) and dynamic l...
The validation of an aerospace structure through the sine vibration analysis
Sinusoidal vibrations represent an ideal case. Technically, it is quite hard to generate pure sinusoidal vibrations without containing other spectral components, called harmonics. Sinusoidal vibrations can appear on prop...