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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2020, Vol. 41 ›› Issue (9): 423559-423559.doi: 10.7527/S1000-6893.2019.23559

• Material Engineering and Mechanical Manufacturing • Previous Articles    

Flapping mechanism with elastic components: dynamic analysis and experiment

ZHANG Wei1,2, LIU Xinjie1, LIU Yan3, WANG Wenbo1, ZHANG Boli4   

  1. 1. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;
    2. Aviation Ground Special Equipment Research Base, Tianjin 300300, China;
    3. Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China;
    4. Basic Experiment Center, Civil Aviation University of China, Tianjin 300300, China
  • Received:2019-10-09 Revised:2019-11-17 Online:2020-09-15 Published:2020-03-26
  • Supported by:
    National Natural Science Foundation of China, Civil Aviation Administration of China (U1533103)

Abstract: To investigate the energy characteristics of flapping-wing transmission mechanisms, this study establishes a complete dynamic model based on the prototype of the Mechanical Systems Laboratory of Delaware University, taking into account the aerodynamic term and a tension spring. Analyses reveal that the peak torque of the aerodynamic term contributes a value of 4.8 times that of the inertia term, dominantly influencing the peak torque of the motor. Orthogonal simulations show that, consistent with the theoretical analyses, the introduction of the tension spring can reduce the peak torque of the motor up to 77.5%. Meanwhile, experimental results exhibit good agreement with theoretical and simulation results. Furthermore, the optimal solution (the position of joint point 185 mm, the original length of the spring 200 mm and the stiffness 0.1 N/mm) is obtained, providing reference for the optimization design of the transmission mechanism. In addition, elastic elements can also effectively reduce the speed fluctuation of the motor, thus providing theoretical guidance for the production and practical application of bionic flapping-wing air vehicles.

Key words: flapping-wing air vehicles, transmission mechanisms, energy characteristics, elastic elements, torque peaks

CLC Number: