Qiang Zhong

Qiang Zhong
Iowa State University | ISU

Doctor of Philosophy
IBiM Co-founder

About

17
Publications
6,865
Reads
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163
Citations
Citations since 2017
16 Research Items
165 Citations
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Introduction
Lab website: www.qzhonglab.com Intelligent and Bio-inspired Mechanics Seminar Series: www.ibim-conference.com

Publications

Publications (17)
Article
Multi-fin systems, like fish or fish-inspired vehicles, are governed by unsteady three-dimensional interactions between their multiple fins. In particular, dorsal/anal fins have received much attention because they are just upstream of the main thrust-producing fin: the caudal (tail) fin. We used a tuna-inspired fish model with variable fin sharpne...
Article
Animals and bio-inspired robots can swim/fly faster near solid surfaces, with little to no loss in efficiency. How these benefits change with propulsor aspect ratio is unknown. Here we show that lowering the aspect ratio weakens unsteady ground effect, thrust enhancements become less noticeable, stable equilibrium altitudes shift lower and become w...
Article
Full-text available
Scaling laws for the thrust production and power consumption of a purely pitching hydrofoil in ground effect are presented. For the first time, ground-effect scaling laws based on physical insights capture the propulsive performance over a wide range of biologically relevant Strouhal numbers, dimensionless amplitudes and dimensionless ground distan...
Article
Fish maintain high swimming efficiencies over a wide range of speeds. A key to this achievement is their flexibility, yet even flexible robotic fish trail real fish in terms of performance. Here, we explore how fish leverage tunable flexibility by using their muscles to modulate the stiffness of their tails to achieve efficient swimming. We derived...
Article
Fish are highly maneuverable compared to human-made underwater vehicles. Maneuvers are inherently transient, so they are often studied via observations of fish and fish-like robots, where their dynamics cannot be recorded directly. To study maneuvers in isolation, we designed a new kind of wireless carriage whose air bushings allow a hydrofoil to m...
Article
When swimming near a solid planar boundary, bio-inspired propulsors can naturally equilibrate to certain distances from that boundary. How these equilibria are affected by asymmetric swimming kinematics is unknown. We present here a study of near-boundary pitching hydrofoils based on water channel experiments and potential flow simulations. We foun...
Article
Scaling laws for the propulsive performance of three-dimensional pitching propulsors – ADDENDUM - Volume 873 - Fatma Ayancik, Qiang Zhong, Daniel B. Quinn, Aaron Brandes, Hilary Bart-Smith, Keith W. Moored
Article
Full-text available
Fish must maneuver laterally to maintain their position in schools or near solid boundaries. Unsteady hydrodynamic models, such as the Theodorsen and Garrick models, predict forces on tethered oscillating hydrofoils aligned with the incoming flow. How well these models predict forces when bio-inspired hydrofoils are free to move laterally or when a...
Article
Full-text available
Experiments and computations are presented for a foil pitching about its leading edge near a planar, solid boundary. The foil is examined when it is constrained in space and when it is unconstrained or freely swimming in the cross-stream direction. It was found that the foil has stable equilibrium altitudes: the time-averaged lift is zero at certai...
Article
Full-text available
Scaling laws for the thrust production and energetics of self-propelled or fixed-velocity three-dimensional rigid propulsors undergoing pitching motions are presented. The scaling relations extend the two-dimensional scaling laws presented in Moored & Quinn ( AIAA J. , 2018, pp. 1–15) by accounting for the added mass of a finite-span propulsor, the...
Preprint
Full-text available
Scaling laws for the thrust production and energetics of self-propelled or fixed-velocity three-dimensional rigid propulsors undergoing pitching motions are presented. The scaling relations extend the two-dimensional scaling laws presented in Moored & Quinn (2018) by accounting for the added mass of a finite-span propulsor, the downwash/upwash effe...
Preprint
Full-text available
Scaling laws for the thrust production and energetics of self-propelled or fixed-velocity three-dimensional rigid propulsors undergoing pitching motions are presented. The scaling relations extend the two-dimensional scaling laws presented in Moored & Quinn (2018) by accounting for the added mass of a finite-span propulsor, the downwash/upwash effe...
Article
Full-text available
Insect wings are flexible structures that passively deform under the action of inertial and aerodynamic forces in flight. Previous studies have focused on the aerodynamic and energetic merits of these deformations. Here, the effect of torsional wing flexibility on maneuverability is investigated by modeling the dynamics of the wing pitch motion whe...
Article
Full-text available
Miniature inertial measurement units (IMUs) are wearable sensors that measure limb segment or joint angles during dynamic movements. However, IMUs are generally prone to drift, external magnetic interference, and measurement noise. This paper presents a new class of nonlinear state estimation technique called state-dependent coefficient (SDC) estim...
Thesis
Full-text available
Functional electrical stimulation (FES) is an application of low-level electrical current to the motor nerves to produce muscle contractions. FES-induced limb motion can be used to reproduce gait in persons with paraplegia. The biggest limitation of using FES for gait restoration is the rapid onset of muscle fatigue. Unlike FES, powered exoskeleton...

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Projects

Projects (4)
Project
1.investigate the mechanism of flapping motion 2.optimization of the flapping dynamics and shape design 3.understanding and approximation of fluid dynamics of fish like steady swimming flapping motion 4. research and control of fast-maneuver flapping motion 5. design and develop a bio-inspired underwater vehicle to achieve high efficiency, high maneuverability and high speed.
Archived project