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Dynamic model and performance analysis of landing buffer for bionic locust mechanism

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Abstract

The landing buffer is an important problem in the research on bionic locust jumping robots, and the different modes of landing and buffering can affect the dynamic performance of the buffering process significantly. Based on an experimental observation, the different modes of landing and buffering are determined, which include the different numbers of landing legs and different motion modes of legs in the buffering process. Then a bionic locust mechanism is established, and the springs are used to replace the leg muscles to achieve a buffering effect. To reveal the dynamic performance in the buffering process of the bionic locust mechanism, a dynamic model is established with different modes of landing and buffering. In particular, to analyze the buffering process conveniently, an equivalent vibration dynamic model of the bionic locust mechanism is proposed. Given the support forces of the ground to the leg links, which can be obtained from the dynamic model, the spring forces of the legs and the impact resistance of each leg are the important parameters affecting buffering performance, and evaluation principles for buffering performance are proposed according to the aforementioned parameters. Based on the dynamic model and these evaluation principles, the buffering performances are analyzed and compared in different modes of landing and buffering on a horizontal plane and an inclined plane. The results show that the mechanism with the ends of the legs sliding can obtain a better dynamic performance. This study offers primary theories for buffering dynamics and an evaluation of landing buffer performance, and it establishes a theoretical basis for studies and engineering applications.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (Grant 51375035) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant 20121102110021).

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Authors and Affiliations

  1. Robotic Institute, Beihang University, Beijing, 100191, China

    Dian-Sheng Chen, Zi-Qiang Zhang & Ke-Wei Chen

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  1. Dian-Sheng Chen
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  2. Zi-Qiang Zhang
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Correspondence to Dian-Sheng Chen.

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Chen, DS., Zhang, ZQ. & Chen, KW. Dynamic model and performance analysis of landing buffer for bionic locust mechanism. Acta Mech. Sin. 32, 551–565 (2016). https://doi.org/10.1007/s10409-015-0523-5

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  • DOI: https://doi.org/10.1007/s10409-015-0523-5

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