...Omer Bayraktar; Abdulmecit Guldas Purpose This study aims to investigate the flight stability, control robustness and trajectory tracking performance of a quadrotor unmanned aerial vehicle ( UAV ) equipped with a dual-axis tilt-rotor mechanism, and compares its performance against conventional...

... with unknown frequency and magnitude. Design/methodology/approach For the trajectory tracking of the quadrotor, an integral sliding mode controller is initially designed. Subsequently, a nonlinear DO is developed to attenuate unknown bounded disturbances. Following this, a reduced-order observer...

...Hamdi Ercan; Hamdi Ulucan; Şekibe Kılıç Purpose The advancements in battery technologies, while trailing behind technological progress, face challenges meeting the soaring energy demands of quadrotors, resulting in flight durations that are far from satisfactory. Hence, this study aims...

... tracking of quadrotor in the Cartesian plane. Design/methodology/approach To achieve trajectory tracking control, firstly the decoupled rotational and translational model of quadrotor are modified by introducing backstepped state-space variables. In the second step, robust integral sliding mode control...

...Oguz Kose; Tugrul Oktay; Enes Özen Purpose The purpose of this paper is to obtain values that stabilize the lateral and longitudinal flight of the quadrotor for which the morphing amount and the best Proportional-Integral-Derivative (PID) coefficients are determined by using the simultaneous...

...Hamdi Ercan; Hamdi Ulucan Purpose The Global Positioning System (GPS) is crucial for determining the positions of quadrotors, enabling safe flight and maintaining stability against environmental conditions. This study aims to investigate the effect of wind on the GPS of quadrotors experimentally...

...Brajesh Kumar Singh; Awadhesh Kumar Purpose The rotorcraft technology is very interesting area since last few decades due to variety of applications. One of the rotorcrafts is the quadrotor unmanned aerial vehicle (QUAV), which contains four rotors mounted on an airframe with an onboard controller...

...Zeyang Zhou; Jun Huang Purpose The purpose of his paper is to study the radar stealth performance of a Y-type quadrotor with coaxial rotors and parallel rotors. Design/methodology/approach This Y-type quadrotor is designed as an aerodynamic layout with parallel twin rotors at the front...

...Hamdi Ercan; Hamdi Ulucan; Muharrem Selim Can Purpose Although windy weather conditions have a significant effect on the flight safety and stability of any aircraft, the fact that quadrotors are lighter than other aircraft makes them more sensitive to the wind. This study aims to examine...

... inertial navigation attitude solution of micro-quadrotor. Design/methodology/approach In this study, a three-stage attitude estimation scheme that combines data preprocessing, gyro drifts prediction and enhanced unscented Kalman filtering (UKF) is proposed. By introducing a preprocessing model...

...Hüseyin Şahin; Oguz Kose; Tugrul Oktay Purpose This study aims to optimize autonomous performance (i.e. both longitudinal and lateral) and endurance of the quadrotor type aerial vehicle simultaneously depending on the autopilot gain coefficients and battery weight. Design/methodology/approach...

...Aziz Kaba; Ahmet Ermeydan Purpose The purpose of this paper is to present an improved particle filter-based attitude estimator for a quadrotor unmanned aerial vehicle (UAV) that addresses the degeneracy issues. Design/methodology/approach Control of a quadrotor is not sufficient enough without...

...Yang Yuan; Haibin Duan Purpose The purpose of this paper is to develop a novel active disturbance rejection attitude controller for quadrotors and propose a controller parameters identification approach to obtain better control results. Design/methodology/approach Aiming at the problem...

...Aziz Kaba Purpose The purpose of this paper is to develop, extend and propose an improved proportional integral derivative (PID) rate control of a quadrotor unmanned aerial vehicle based on a convexity-based surrogated firefly algorithm. Design/methodology/approach An improved PID controller...

...) demonstrates more confrontation to unknown disturbances, faults and system dynamics compared with other investigated techniques and techniques used in the literature. The proposed algorithms are investigated by the utilization of quadrotor unmanned aerial vehicle dynamics, which authenticate the efficiency...

... The major findings of this paper include the criteria of designing the robust adaptive control parameters and investigating the disturbance rejection when robust adaptive control based DOBC is developed. Practical implications In practice, the flight of quadrotor is affected by different kind...

...Azam Hokmabadi; Mahdi Khodabandeh Purpose The purpose of this paper is to design a controller for a quadrotor only by using input–output data without a need for the system model. Design/methodology/approach Tracking control for the quadrotor is considered by using unfalsified control, which...

...Taki Eddine Lechekhab; Stojadin Manojlovic; Momir Stankovic; Rafal Madonski; Slobodan Simic Purpose The control of a quadrotor unmanned aerial vehicle (UAV) is a challenging problem because of its highly nonlinear dynamics, under-actuated nature and strong cross-couplings. To solve this problem...

...Aziz Kaba; Emre Kiyak Purpose The purpose of this paper is to introduce an artificial bee colony-based Kalman filter algorithm along with an extended objective function to ensure the optimality of the estimator of the quadrotor in the presence of unknown measurement noise statistics. Design...

...Oguz Kose; Tugrul Oktay Purpose The purpose of this paper is to design a quadrotor with collective morphing using the simultaneous perturbation stochastic approximation (SPSA) optimization algorithm. Design/methodology/approach Quadrotor design is made by using Solidworks drawing program...