4 papers
Write-Safe Flow Field Mapping under Ambiguous Onboard Sensing and Localization Drift
Linhao Jin, Qimin Feng, Peter Gunnarson +1
Mobile robots can infer local flow structure from onboard sensing, but a locally plausible estimate is not always safe to write into a global map. Similar flow structures may produ…
Inertial effects on the mechanical efficiency of a semi-passive oscillating hydrofoil energy harvester
Zihan Zhang, Qimin Feng, Yuanhang Zhu +1
Oscillating-foil-based energy harvesters have demonstrated strong potential for low-speed hydrokinetic energy extraction; however, the actuator-level mechanical energy balance asso…
Lift reversal from vortex-surface phase coupling in a heaving foil near a free surface
Qimin Feng, Tianjun Han, Qiang Zhong
Classical descriptions of flapping propulsion near a free surface emphasize the energetic penalties of wave generation, treating the interface primarily as an energy sink. Here, we…
Wavenumber affects the lift of ray-inspired fins near a substrate
Yuanhang Zhu, Leo Liu, Tianjun Han +4
Rays and skates tend to have different fin kinematics depending on their proximity to a ground plane such as the seafloor. Near the ground, rays tend to be more undulatory (high wa…