Multi-body dynamic modelling and flight control for an asymmetric variable sweep morphing UAV

Tong, Lei; Ji, Haibo

doi:10.1017/s000192400000943x

Cited by 27 publications

(9 citation statements)

References 25 publications

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“…Moreover, wing deformation will also impose extra static moments and aerodynamic forces/moments on the UAV. [25][26][27] To obtain a more accurate model, we took these factors into account when establishing dynamic equations for the drone. The establishment process of the coordinate system is shown in Figure 2b.…”

Section: Dynamic Modeling Of the Morphing Wing Dronementioning

confidence: 99%

Employing Wing Morphing to Cooperate Aileron Deflection Improves the Rolling Agility of Drones

Liu,

Zhang,

Gao

et al. 2023

Advanced Intelligent Systems

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In the wild, gliding birds dodge obstacles or predators by folding and twisting their wings swiftly to perform a rapid roll. Accordingly, the authors strive to explore the feasibility of improving the roll rate of drones through this bird‐inspired morphing method, by using the asymmetric sweepback of wings to simulate the contraction of birds’ wings and the deflection of the aileron to imitate wing torsion. Moreover, the effects of wing morphing on the centroid, inertia matrix, and aerodynamic characteristics of the drone are explored herein, and a nonlinear dynamic model is established. Furthermore, a novel cooperative strategy that combines wing morphing with aileron deflection for roll control is introduced, and a flight controller based on this cooperative strategy is developed. Finally, the superiority of the cooperative strategy and the accuracy of the dynamic modeling have been validated in the outdoor flights of the morphing wing drone.

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Section: Dynamic Modeling Of the Morphing Wing Dronementioning

confidence: 99%

Employing Wing Morphing to Cooperate Aileron Deflection Improves the Rolling Agility of Drones

Liu,

Zhang,

Gao

et al. 2023

Advanced Intelligent Systems

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“…Henry and Pines [4] have presented a mathematical model for an aircraft executing a pure roll by means of span morphing and illustrated that the additional term tends to modify the total system damping. Tong and Ji [5] have established the dynamic model and explored using the idea of roll control through asymmetric sweep angle change rather than traditional aileron in the flight control design. Chen et al [6] have developed the dynamic and kinematic equations of asymmetric telescopic wing aircraft.…”

Section: Velocity Potentialmentioning

confidence: 99%

Efficiency Change of Control Surface of a Biomimetic Wing Morphing UAV

Song

Pei

et al. 2020

IEEE Access

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Variation modes of avian wings offer large-scale morphing aircraft an effective approach for solving problems such as the mass center shift in longitudinal trim and control system design during the morphing process. In this paper, a numerical method is established for fully understanding the influence of combined morphing on roll efficiency of a biomimetic wing unmanned aerial vehicle (UAV) from the perspective of aerodynamic change, system convergence time and aerodynamic energy consumption. Analysis and simulation results show that the biomimetic wing provides effective measures to improve the mission execution efficiency of UAV. System oscillation can obviously be reduced with asymmetric sweep angle change as the supervisory control surface for pure roll maneuver, and actuators require higher output power than that with the single deflection of the flexible trailing edge (Flex-TE). In addition, for aircraft design, a larger mass ratio of the inner wing is beneficial to enhance system stability. Energy consumption of wing and Flex-TE show laws of first increasing and then decreasing along the spanwise direction during the morphing process. For actuators of the Flex-TE, the output power of units 1 to 15 should higher than other spanwise units. For the sweep angle generalized control surface, the maximum value of energy consumption per unit time is located near the 20-th spanwise unit. INDEX TERMS Multi-joint wing, control efficiency, control allocation, aerodynamic energy consumption.

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“…So it needs modeling methods in the multi-body dynamics discipline field, including the Newton-Euler method, Lagrange mechanics method, 18 Kane method, 19 or Natural Coordinate method. 20 Lei Tong 21 built a multi-body dynamic model of an asymmetric variable-sweep morphing aircraft and explored the idea of aircraft roll control by using an asymmetric wing sweep angle. Jiguang An 22 presented a numerical method to obtain a complete solution to the dynamic response of a variable swept-wing aircraft.…”

Section: Introductionmentioning

confidence: 99%

Dynamics simulation of folding wing UAVs launched from a high-altitude balloon platform

Zhang

Yang

Cai

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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It is a new application of the high-altitude balloon system to launch multiple small folding wing unmanned aerial vehicles (UAVs). Based on the design of the launching system, we conduct numerical simulations of the ejection process from the balloon platform and the subsequent UAV wing deployment with trajectory leveling operation. We use the Kane method to establish the dynamic model of the balloon launching platform in the inertial coordinate system (ICS). By introducing the degree of freedom of UAV sliding along the sliding track, we realize the dynamic simulation of eight UAV launching processes and obtain the instantaneous separated states. The folding wing UAV first deploys its wings after ejection, which has the coupling characteristics between structural deformation and attitude adjustment. It is regarded as a multi-rigid body connecting structure composed of the fuselage and four wings. We establish the dynamic simulation model by the Kane method in the UAV body coordinate system (BCS). The Radau pseudo-spectral method is used to calculate the flight trajectory of each UAV. This paper is an engineering application research and can provide a simulation reference for the launching test of the balloon-borne folding wing UAV program.

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Multi-body dynamic modelling and flight control for an asymmetric variable sweep morphing UAV

Cited by 27 publications

References 25 publications

Employing Wing Morphing to Cooperate Aileron Deflection Improves the Rolling Agility of Drones

Employing Wing Morphing to Cooperate Aileron Deflection Improves the Rolling Agility of Drones

Efficiency Change of Control Surface of a Biomimetic Wing Morphing UAV

Dynamics simulation of folding wing UAVs launched from a high-altitude balloon platform

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