Development of a propulsion system for a biomimetic thruster

被引:7
|
作者
Ha, NgocSan [1 ]
Goo, NamSeo [1 ]
Yoon, HyeonKyu [2 ]
机构
[1] Konkuk Univ, Dept Adv Technol Fus, Seoul 143701, South Korea
[2] Changwon Natl Univ, Dept Naval Architecture & Marine Engn, Gyeongnam 641773, South Korea
来源
CHINESE SCIENCE BULLETIN | 2011年 / 56卷 / 4-5期
关键词
biomimetic micro-robots; swimming micro-robots; propulsion of flagella; medical application; COMPLEX FLAGELLAR FILAMENTS; FISH;
D O I
10.1007/s11434-010-4134-z
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We studied theoretically and experimentally a biomimetic propulsion system inspired by the motility mechanisms of bacteria such as E. coli. Our goal was to investigate the effect of the "complex" filament of Rhizobium Meliloti bacteria on thrust force. The complex filament is a helically perturbed filament, similar to a plain filament threaded through a small helix. The propulsive performance of this system was estimated by modeling the dynamics of helical wave motion in viscous fluid. The model consists of a helical filament which is axially rotated at angular velocity omega. Resistive force theory (RFT) was applied to this model to calculate the thrust force and required torque. The Buckingham PI theorem (non-dimensional analysis) was also used to analyze the theoretical results. The procedure for making a complex filament with various pitch angles theta (s) from a small helix and plain filament is explained in detail. To validate the theoretical results for helical wave propulsion and compare the characteristics of complex and plain filaments together, an experiment was performed to measure the thrust forces in silicone oil. The experimental results agreed with the theoretical values predicted by RFT. The thrust forces of complex filaments depended on the shape of small helix winding. The maximum thrust force was achieved at a small helix pitch angle of theta (s) = 45A degrees. In addition, we found that the thrust force generated by a complex filament had a value about 10% higher than that of a plain filament with the same equivalent diameter d (e) .
引用
收藏
页码:432 / 438
页数:7
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