The Synthesis of Electric Drives Characteristics of the UAV of “Convertiplane–Tricopter” Type

Abstract

Abstract. The paper is devoted to the review of controlled motion of the unmanned aerial vehicle (UAV) with vertical takeoff and landing, the convertiplane type, with three tilt rotors. The UAV is equipped with a swept wing, the calculation of aerodynamic parameters of which has been carried out in the software program XFLR5, taking into consideration the weight and size requirements. There have been determined the lift and resistance coefficients of the UAV depending on the angle of attack on the basis of the vortex method. There has been done the analysis of the influence of wing profile on the calculated aerodynamic characteristics. There also has been realized the synthesis of the traction energy-efficient options of the drive propellers that reduce power consumption, increasing the accuracy of the automatic control system.

Hardware/Software Architecture for Research of Control Algorithms of a Quadcopter in the Presence of External Wind Loads

“…The position of the center of mass of the convertiplane-quadcopter in space is characterized by the X 0 , Y 0 ,Z 0 coordinates in a global Cartesian coordinate system and the three angles of rotation ϕ, θ, ψ-roll, pitch, and yaw angles around the axes of the local coordinate system CX 1 Y 1 Z 1 [3,[13][14][15] (Fig. 1).…”

“…1). The body of the device is modeled as a solid body with six degrees of freedom, the motion of which can be During the flight, the following forces are applied to the aerial vehicle: the gravity of the body m c g and the rotors' screws m i g attached at points C and A i , respectively, the aerodynamic forces of the rotors F i , attached to the mass centers of the rotors A i , (i = 1 − 4) [3].…”

“…The sum of all external forces on the axis (0) of the coordinate system: 1) , where T 10 -matrix of rotation of the local coordinate system [3,12].…”

“…Expert assessment of the current state of robotics shows that there are problems in the issues of scientific and technical reserve in relation to complexes with unmanned aerial vehicles (UAVs), one of which is the development of methods and algorithms for autonomous control of UAVs [1][2][3][4][5]. There are problematic aspects of designing artificial intelligence systems as a task of synthesizing the behavior of an autonomous agent, for example, in the tasks of aerial monitoring of endemic animals in the mountainous area of the Andean Eastern Cordillera (Ecuador), where the slopes are windward throughout (affected by precipitation and wind loads) and deeply dissected by rivers.…”

Study of Tiltrotor Oscillations in a Vertical Longitudinal Plane

“…Проведем моделирование переходного процесса и построим графики зависимостей корректирующих воздействий Х, Y от коэффициентов пропорционального k p и дифференциального k d регуляторов [14,15,20]: Характер изменения графиков свидетельствует о существенном влиянии коэффициентов регулятора на характер переходного процесса в части амплитудных значений ошибки и времени пе-реходного процесса. Для минимизации ошибки позиционирования необходимо решать задачу синтеза параметров регулятора, так же, как это выполнено для координаты OX 0 (рис 6).…”