David Kumar1*, Swapnil Shandilya2

1 Department of Aerospace Engineering, Indian Institute of Technology Kanpur, India; Department of Aeronautical Engineering and Center for Non-Destructive Testing, Chaoyang University of Technology, Taichung, Taiwan, R.O.C.
2 Department of Mechanical Engineering, Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, India


 

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ABSTRACT


A bioinspired tethered MAV model is designed, constructed and studied for structural dynamic characteristics using novel materials and methods. The model consists of two flapping wings, a compliant flapping mechanism, and a supporting chassis. Large size insects such as dragonfly and cicada are considered as inspiration for the designing purposes. The wings and mechanism designed in this study are a simplified form of the natural counterparts. These idealized bioinspired structures are first studied for structural dynamic characteristics using finite element methods. Carbon nanotubes/polypropylene (CNTs/PP) nanocomposite stiffeners and a thin LDPE membrane are used to realize the designed wing model. The use of this novel material composition resulted in a lightweight, thin, and flexible wing capable of large amplitude passive bending-twisting motion. For constructing the flapping mechanism, a novel compliant mechanism is fabricated and attached with a piezoelectric actuator of cantilever form. The compliant mechanism is designed with CNTs/PP nanocomposite flexure joints supported using rigid carbon fiber/epoxy composite linkages. The fabrication of wing stiffeners and mechanism flexures from lab developed CNTs/PP nanocomposite materials is carried out using laser micromachining based manufacturing technique. The complete MAV model is constructed by assembling the wings and mechanism with a carbon fiber/epoxy composite chassis. The final assemblage is a two-winged MAV model of a total mass, body length, and wingspan of 0.6 1g, 60.46 mm, and 90.14 mm, respectively. An external customized power supply is developed and used with a microcontroller to actuate the flapping mechanism and wings during experiments. The computational structural analysis showed that no resonance occurs at the mechanism, all the first four fundamental modes are at the wings. This is advantageous for accurate and efficient motion transmission to the wings. The model generates large-amplitude wing deflections with a very small amplitude input excitation from the actuator - useful for higher aerodynamic performance. Experimentally, the structural dynamic analysis of the MAV model is carried out using an in-house high-speed 3D digital image correlation (DIC) technique, which reveals that the wings generate bending dominated deforming shape with marginal twisting and positive camber (during downstroke). Structural dynamic results from computations are in good agreement with the experiments that validates both of the approaches for further advancements in the developed MAV model. Overall outcome of the current work is a simplified biomimetic MAV design, a potential candidate for developing mechanically efficient MAV models.


Keywords: MAVs, Flapping wings, Biomimicking, Nanocomposites, Flexure joints, Insects.


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REFERENCES


  1. Azuma, A., Azuma, S., Watanabe, I., Furuta, T. 1985. Flight mechanics of a dragonfly. Journal of Experimental Biology, 116, 79–107.

  2. Azuma, A., Watanabe, T. 1988. Flight performance of a dragonfly. Journal of Experimental Biology, 137, 221–252.

  3. Bolsman, C.T., Goosen, J.F.L., VanKeulen, F. 2009. Design overview of a resonant wing actuation mechanism for application in flapping wing MAVs. International Journal of Micro Air Vehicles, 1, 263–272.

  4. Brodsky, A.K. 1994. The evolution of insect flight. Oxford University Press. Oxford. UK.

  5. Combes, S.A., Daniel, T.L. 2003. Flexural stiffness in insect wings I. Scaling and the influence of wing venation. Journal of Experimental Biology, 206, 2979–2987.

  6. Combes, S.A., Daniel, T.L. 2003. Into thin air: contributions of aerodynamic and inertial-elastic forces to wing bending in the hawkmoth Manduca sexta. Journal of Experimental Biology, 206, 2999–3006.

  7. Dickinson, M.H., Lehmann, F.O., Sane, S.P. 1999. Wing rotation and the aerodynamic basis of insect flight. Science, 284, 1954–1960.

  8. Ellington, C.P., Van Den Berg, C., Willmott, A.P., Thomas, A.L. 1996. Leading-edge vortices in insect flight. Nature, 384, 626–630.

  9. Finio, B.M., Shang, J.K., Wood, R.J. 2009. Body torque modulation for a microrobotic fly. IEEE International Conference on Robotics and Automation, Kobe, Japan.

  10. Graule, M.A., Chirarattananon, P., Fuller, S.B., Jafferis, N.T., Ma, K.Y., Spenko, M., Kornbluh, R., Wood, R.J. 2016. Perching and takeoff of a robotic insect on overhangs using switchable electrostatic adhesion. Science, 352, 978–982.

  11. Greenewalt, C.H. 1960. The wings of insects and birds as mechanical oscillators. Proceedings of the American Philosophical Society, 104, 605–611.

  12. Harvard, 2011. Autonomous flying microrobots (RoboBees).  URL: https://wyss.harvard.edu/technology/autonomous-flying-microrobots-robobees/.

  13. Jafferis, N.T., Graule, M.A., Wood, R.J. 2016. Non-linear resonance modeling and system design improvements for underactuated flapping-wing vehicles. IEEE International Conference on Robotics and Automation, Stockholm, Sweden.

  14. Keennon, M. 2011. Hummingbird Nano Air Vehicle (NAV). URL: http://www.airforce-technology.com/projects/hummingbird-nano-air-vehicle/.

  15. Keennon, M., Klingebiel, K., Won, H., Andriukov, A.  2012. Development of the nano hummingbird: A tailless flapping wing micro air vehicle. AIAA Aerospace Sciences Meeting, Reston, VA, USA.

  16. Klowden, M.J. 2013. Physiological Systems in Insects. Academic Press. London. UK.

  17. Kumar, D., Kamle, S., Mohite, P.M., Kamath, G.M. 2019. A novel real-time DIC-FPGA-based measurement method for dynamic testing of light and flexible structures. Measurement Science and Technology, 30, 045903.

  18. Kumar, D., Mohite, P.M., Kamle, S. 2019. Dragonfly inspired nanocomposite flapping wing for micro air vehicles. Journal of Bionic Engineering, 16, 894–903.

  19. Kumar, D., Shandilya, S., Khare, V., Kamle, S., Chiang, C.H. 2020. Insect-inspired micro air vehicle with nanocomposite flapping wings and flexure joints. SPIE Active and Passive Smart Structures and Integrated Systems XIV, 1137616.

  20. Kumar, V.S., Kumar, D., Goyal, T., Mohite, P.M., Kamle, S. 2014. Development and application of PP-CNT composite for hummingbird inspired MAV flapping wings. International Micro Air Vehicle Conference and Competition, Delft, Netherlands.

  21. Masoud, H., Alexeev, A. 2010. Resonance of flexible flapping wings at low Reynolds number. Physical Review E, 81, 56304.

  22. Okamoto, M., Yasuda, K., Azuma, A. 1996. Aerodynamic characteristics of the wings and body of a dragonfly. Journal of Experimental Biology, 199, 281–294.

  23. Park, J.-H., Yoon, K.-J., Park, H.-C. 2007. Development of bio-mimetic composite wing structures and experimental study on flapping characteristics. IEEE International Conference on Robotics and Biomimetics, Sanya, China.

  24. Raney, D.L., Slominski, E.C. 2004. Mechanization and control concepts for biologically inspired micro air vehicles. Journal of Aircraft, 41, 1257–1265.

  25. Ren, H., Wang, X., Li, X., Chen, Y. 2013. Effects of dragonfly wing structure on the dynamic performances. Journal of Bionic Engineering, 10, 28–38.

  26. Schilder, R.J., Marden, J.H. 2004. A hierarchical analysis of the scaling of force and power production by dragonfly flight motors. Journal of Experimental Biology, 207, 767–776.

  27. Smith, C.W., Herbert, R., Wootton, R.J., Evans, K.E. 2000. The hind wing of the desert locust (Schistocerca gregaria Forskal). II. Mechanical properties and functioning of the membrane. Journal of Experimental Biology, 203, 2933–2943.

  28. Song, F., Lee, K.L., Soh, A.K., Zhu, F., Bai, Y.L. 2004. Experimental studies of the material properties of the forewing of cicada (Homóptera, Cicàdidae). The Journal of Experimental Biology, 207, 3035–42.

  29. Sudo, S., Tsuyuki, K. Kanno, K. 2005. Wing characteristics and flapping behavior of flying insects. Experimental Mechanics, 45, 550–555.

  30. Valavanis, K.P., Vachtsevanos, G.J. 2015. Handbook of unmanned aerial vehicles. Springer. Netherlands.

  31. Wan, H., Dong, H., Gai, K. 2015. Computational investigation of cicada aerodynamics in forward flight. Journal of The Royal Society Interface, 12, 20141116.

  32. Warrick, D.R., Tobalske, B.W., Powers, D.R. 2005. Aerodynamics of the hovering hummingbird. Nature, 435, 1094–1097.

  33. Weis-Fogh, T. 1973. Quick estimates of flight fitness in hovering animals, including novel mechanisms for lift production. Journal of Experimental Biology, 59, 169–230.

  34. Wikipedia, 2011. AeroVironment Nano hummingbird. URL: https://en.wikipedia.org/wiki/AeroVironment_Nano_Hummingbird.

  35. Wood, R.J. 2007. Design, fabrication, and analysis of a 3DOF, 3cm flapping-wing MAV. IEEE/RSJ International Conference on Intelligent Robots and Systems, San Diego, CA, USA.

  36. Wood, R.J. 2007b. Liftoff of a 60 mg flapping-wing MAV. IEEE International Conference on Intelligent Robots and Systems, San Diego, CA, USA.

  37. Wood, R.J., Avadhanula, S., Sahai, R., Steltz, E., Fearing, R.S. 2008. Microrobot design using fiber reinforced composites. Journal of Mechanical Design, 130, 052304.

  38. Wood, R.J., Nagpal, R., Wei, G.-Y. 2013. Flight of the robobees. Scientific American, 308, 60–65.

  39. Wu, P., Stanford, B.K., Sällström, E., Ukeiley, L., Ifju, P.G. 2011. Structural dynamics and aerodynamics measurements of biologically inspired flexible flapping wings. Bioinspiration & Biomimetics, 6, 16009.

  40. Zhang, J., Xinyan, D. 2017. Resonance principle for the design of flapping wing micro air vehicles. IEEE Transactions on Robotics, 33, 183–197.


ARTICLE INFORMATION


Received: 2020-11-20

Accepted: 2020-12-31
Available Online: 2021-06-01


Cite this article:

Kumar, D., Shandilya, S. 2021. A bioinspired MAV with nanocomposite wings and flexure joints: design and structural dynamic analysis, International Journal of Applied Science and Engineering, 18, 2020299. https://doi.org/10.6703/IJASE.202106_18(2).001

  Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.