Bionic hydrofoil propulsion experiments research

In order to discuss hydrofoil propulsion method, the experimental research of bionic turtle hydrofoil propulsion was carried out. Based on the analysis of living prototype motion principle, the bionic hydrofoil propulsion experimental sample was developed including bio-hydrofoil motion machine, bio-palmiped motion machine and centralized control module. Then, the direct navigation and yawing performance test experiments of bionic sample in the pool were taken out, validating the influence that change of motion parameters effects on the longitudinal component force and plane yawing torque of bionic sample. The experiments results indicated that, the angular velocity of hydrofoil stroke spin ω₁ had a descending acceleration direct proportion to the direct navigation speed and yawing velocity of sample; the double hydrofoils contrary phase differential yawing had merely increased the motion efficiency about 60% rather than mono-limb yawing because of the much more vortex resistance; following the augment of ω₁, the propulsion efficiency of right hydrofoil had a from high to low decline trend comparing to the left. These experimental researches had provided significant references to the study on control strategies for the sample.