On-ground lateral direction control for an unswept flying-wing UAV

Y., Z.; Zhu, Xiaoping; Zhou, Zihan

doi:10.1017/aer.2018.167

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…The lateral-directional control law is still based on the successive closed-loop theory [20]. For the UAV with aileron-free design, the rudder was the only input for lateral-directional control.…”

Section: Lateral-directional Control Lawmentioning

confidence: 99%

Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

et al. 2020

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This paper describes our work on a small, hand-launched, solar-powered unmanned aerial vehicle (UAV) suitable for low temperatures and high altitudes, which has the perpetual flight potential for conservation missions for rare animals in the plateau area in winter. Firstly, the conceptual design method of a small, solar-powered UAV based on energy balance is proposed, which is suitable for flight in high-altitude and low-temperature area. The solar irradiance model, which can reflect the geographical location and time, was used. Based on the low-temperature discharge test of the battery, a battery weight model considering the influence of low temperature on the battery performance was proposed. Secondly, this paper introduces the detailed design of solar UAV for plateau area, including layout design, structure design, load, and avionics. To increase the proportion of solar cells covered, the ailerons were removed and a rudder was used to control both roll and yaw. Then, the dynamics model of an aileron-free layout UAV was developed, and the differences in maneuverability and stability of aileron-free UAV in plateau and plain areas were analyzed. The control law and trajectory tracking control law were designed for the aileron-free UAV. Finally, the flight test was conducted in Qiangtang, Tibet, at an altitude of 4500 m, China's first solar-powered UAV to take off and land above 4500 m on the plateau in winter (−30 • C). The test data showed the success of the scheme, validated the conceptual design method and the success of the control system for aileron-free UAV, and analyzed the feasibility of perpetual flight carrying different loads according to the flight energy consumption data.

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Section: Lateral-directional Control Lawmentioning

confidence: 99%

Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

et al. 2020

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“…The algorithm structure is shown in Figure 8. Due to the different sampling frequencies, the corresponding state of the fast sensor measurement update using the air pressure sensor includes altitude, airspeed and side slip angle pseudo measurement [26]. The states corresponding to the slow update using GPS include location, ground speed and course.…”

Section: Ekf State Estimation Structurementioning

confidence: 99%

Low-Cost Sensors State Estimation Algorithm for a Small Hand-Launched Solar-Powered UAV

Guo

Zhou

Zhu

et al. 2019

Sensors

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In order to reduce the cost of the flight controller and improve the control accuracy of solar-powered unmanned aerial vehicle (UAV), three state estimation algorithms based on the extended Kalman filter (EKF) with different structures are proposed: Three-stage series, full-state direct and indirect state estimation algorithms. A small hand-launched solar-powered UAV without ailerons is used as the object with which to compare the algorithm structure, estimation accuracy, and platform requirements and application. The three-stage estimation algorithm has a position accuracy of 6 m and is suitable for low-cost small, low control precision UAVs. The precision of full-state direct algorithm is 3.4 m, which is suitable for platforms with low-cost and high-trajectory tracking accuracy. The precision of the full-state indirect method is similar to the direct, but it is more stable for state switching, overall parameters estimation, and can be applied to large platforms. A full-scaled electric hand-launched UAV loaded with the three-stage series algorithm was used for the field test. Results verified the feasibility of the estimation algorithm and it obtained a position estimation accuracy of 23 m.

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“…The author of this paper improved the propeller thrust model proposed by Beard [21] through experimental data in the article [22].…”

Section: Lateral-directional Mathematical Modelmentioning

confidence: 99%

“…m is an integer that ensures −π < ψ c ≤ π. Obviously, Formula (22) does not consider the effect of the velocity. Usually, the higher the speed, the smaller K d should be.…”

Section: Lateral-directional Trajectory Tracking Control Law Based On Vfmentioning

confidence: 99%

A Lateral-Directional Control Method for High Aspect Ratio Full-Wing UAV and Flight Tests

Zhu

Zhou

et al. 2019

Applied Sciences

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To solve the lateral-directional control problem of the high aspect ratio full-wing unmanned aerial vehicle (UAV) without an aileron and rudder, a control method is proposed that uses the differential thrust of propellers as the control output and the yaw angle as the controlled attitude angle. Meanwhile, simulation analysis and experimental verification are carried out. First, a lateral-direction mathematical model and a differential thrust of propeller model of the full-wing drone are established. The influence of the aerodynamic derivative C Y β on the lateral-direction mode is analyzed. Second, based on nonlinear dynamic inversion (NDI) and active disturbance rejection control (ADRC) theories, a yaw angle controller that uses the differential thrust of propellers as the control output is designed. Finally, the vector field (VF) method is improved to obtain the straight-line trajectory tracking method satisfying different speeds, and the logic of waypoint switching is given. The research shows that C Y β has a great influence on the dutch roll damping of the drone. For the full-wing configuration, it is feasible to use the yaw angle as the controlled attitude angle without considering the roll angle. The simulation and experimental results show that the designed lateral-directional control method for the high aspect ratio full-wing UAV has a good control effect and disturbance rejection ability. Meanwhile, the control method has less parameters to adjust and less calculation, which is very suitable for engineering applications.

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On-ground lateral direction control for an unswept flying-wing UAV

Cited by 13 publications

References 16 publications

Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

Low-Cost Sensors State Estimation Algorithm for a Small Hand-Launched Solar-Powered UAV

A Lateral-Directional Control Method for High Aspect Ratio Full-Wing UAV and Flight Tests

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