Journal of Bionic Engineering ›› 2024, Vol. 21 ›› Issue (1): 192-208.doi: 10.1007/s42235-023-00443-w
Experimental Study on the Efect of Increased Downstroke Duration for an FWAV with Morphing‑coupled Wing Flapping Confguration
Ang Chen1； Bifeng Song1； Zhihe Wang1； Kang Liu1； Dong Xue1,2; Xiaojun Yang1
- 1 School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China 2 Harbin Institute of Technology, Shenzhen 518055, China
Experimental Study on the Efect of Increased Downstroke Duration for an FWAV with Morphing‑coupled Wing Flapping Confguration
Ang Chen1； Bifeng Song1； Zhihe Wang1； Kang Liu1； Dong Xue1,2; Xiaojun Yang1
- 1 School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China 2 Harbin Institute of Technology, Shenzhen 518055, China
摘要： This paper is based on a previously developed bio-inspired Flapping Wing Aerial Vehicle (FWAV), RoboFalcon, which can fly with a morphing-coupled flapping pattern. In this paper, a simple flapping stroke control system based on Hall effect sensors is designed and applied, which is capable of assigning different up- and down-stroke speeds for the RoboFalcon platform to achieve an adjustable downstroke ratio. The aerodynamic and power characteristics of the morphing-coupled flapping pattern and the conventional flapping pattern with varying downstroke ratios are measured through a wind tunnel experiment, and the corresponding aerodynamic models are developed and analyzed by the nonlinear least squares method. The relatively low power consumption of the slow-downstroke mode of this vehicle is verified through outdoor flight tests. The results of wind tunnel experiments and flight tests indicate that increased downstroke duration can improve aerodynamic and power performance for the RoboFalcon platform.