Bifurcation Flight Dynamic Analysis of a Strake-Wing Micro Aerial Vehicle

Abstract

Non-linear phenomena are particularly important in -flight dynamics of micro-class unmanned aerial vehicles. Susceptibility to atmospheric turbulence and high manoeuvrability of such aircraft under critical flight conditions cover non-linear aerodynamics and inertia coupling. The theory of dynamical systems provides methodology for studying systems of non-linear ordinary differential equations. The bifurcation theory forms part of this theory and deals with stability changes leading to qualitatively different system responses. These changes are called bifurcations. There is a number of papers, the authors of which applied the bifurcation theory for analysing aircraft flight dynamics. This article analyses the dynamics of critical micro aerial vehicle flight regimes. The flight dynamics under such conditions is highly non-linear, therefore the bifurcation theory can be applied in the course of the analysis. The application of the theory of dynamical systems enabled predicting the nature of micro aerial vehicle motion instability caused by bifurcations and analysing the post-bifurcation microdrone motion. This article presents the application of bifurcation analysis, complemented with time-domain simulations, to understand the open-loop dynamics of strake-wing micro aerial vehicle model by identifying the attractors of the dynamic system that manages upset behaviour. A number of factors have been identified to cause potential critical states, including non-oscillating spirals and oscillatory spins. The analysis shows that these spirals and spins are connected in a one-parameter space and that due to improper operation of the autopilot on the spiral, it is possible to enter the oscillatory spin.

Special Issue on Unmanned Aerial Vehicles

“…In [1], aerodynamic characterization of a coaxial tri-rotor Micro Air vehicle (MAV) is performed, with particular attention to the influence of wind effect. Another type of MAV configuration, namely a strake-wing MAV, is considered in [2], where bifurcation theory is applied to study the open loop flight dynamics of the vehicle.…”

An Intelligent Algorithm for Aerodynamic Parameters Calibration of Wind Tunnel Experiment at a High Angle of Attack

“…Chen [11] applied the bifurcation analysis to the behavior analysis of a fixed-wing aircraft with a strake-wing, providing the basic structure of the dynamical system. Nowakowski et al [12] applied a support vector machine to the unsteady aerodynamic modeling at a high angle of attack. For a small number of samples, the prediction accuracy of this model was much higher compared to the other intelligent learning methods.…”

Multi-UAV cooperative reconnaissance mission planning novel method under multi-radar detection

“…Although the content of these studies is related to the mission planning in the reconnaissance process of UAVs, they only pay attention to the situation where all UAVs take off from the same base. Some research shifted to the area of multi-base multi-UAV cooperative reconnaissance mission planning (M-MUCRMP), [37][38][39] and solve the model using combined searching algorithms. Despite this improvement in MUCRMP, the problem of how to effectively evade the enemy's radio counter-reconnaissance methods has not been paid attention to in the current research process.…”