仿生机器鱼尾鳍推进性能实验研究

Experimental research on the propulsion performance of fish-like caudal fins

该文研制了仿鲤鱼机器鱼平台,并通过系泊测力实验研究了自然界常见的圆形、叉形和新月形尾鳍的推进性能,同时比较了刚性、弹性两种材质对尾鳍推进性能的影响。结果表明,弹性尾鳍让机器鱼的平均推力随振幅和频率的变化更平稳;在摆动频率处于中高段时,展弦比较大的刚性尾鳍比弹性尾鳍能产生更大的推力,而展弦比较小的弹性尾鳍比刚性尾鳍能产生更大的推力。

A Carp-like robotic fish was designed and built, based on which platform the fins with three different shapes,（rounded, forked and lunate）, as well as with two different materials（rigid and elastic） were investigated through mooring force test. The attentions were paid to their propulsion performances. The results showed that in general the flexible caudal fins produced more stable thrust when varying their flapping amplitudes and frequencies. For the medium to high values of frequency and the caudal fins with high aspect ratios, the rigid fin can produce larger thrust than its flexible counterpart, while for the fins with lower aspect ratios, the flexible fins can produce larger thrust.