Hilary Bart-Smith

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or paired fins (pectoral and pelvic) (Drucker & Lauder, 1999, 2001; Hove et al., 2001; Standen, 2008; Standen & Lauder, 2007). Other species generate thrust primarily by activating body musculature to bend the body and generate waves passing from the head toward the tail (Gillis, 1996; Jayne & Lauder, 1994, 1995c; Lauder & Tytell, 2006; Rome et al., 1993).(More)
A novel depth control device has been designed and built. The proof-of-concept device utilizes the principles of electrolysis of water, enhanced by the inclusion of an ionic polymer-metal composite (IPMC) membrane as a medium. The device design incorporates an artificial bladder where the volume of gas generated by electrolysis is controlled by a solenoid(More)
Myliobatidae is a family of large pelagic rays including cownose, eagle and manta rays. They are extremely efficient swimmers, can cruise at high speeds and can perform turn-on-a-dime maneuvering, making these fishes excellent inspiration for an autonomous underwater vehicle. Myliobatoids have been studied extensively from a biological perspective; however(More)
Ionic polymer–metal composites (IPMCs) are one type of wet electroactive polymers that show promising actuating properties in many bio-inspiring underwater robotic applications. In these applications, 3-dimensional kinematic motions are desirable to generate high efficient thrust and maneuverability. However, traditional IPMCs are limited in being only able(More)
Rhythmic motion employed in animal locomotion is ultimately controlled by neuronal circuits known as central pattern generators (CPGs). It appears that these controllers produce efficient oscillatory command signals by entraining to a resonant gait via sensory feedback. This property is of great interest in the control of autonomous vehicles. In this paper,(More)
The cownose ray (Rhinoptera bonasus) demonstrates excellent swimming capabilities; generating highly efficient thrust via flapping of dorsally flattened pectoral fins. In this paper, we present a bio-inspired and free swimming robot that mimics the swimming behavior of the cownose ray. The robot has two artificial pectoral fins to generate thrust through a(More)
The bending performance of sandwich construction with thin cellular metal cores has been measured and simulated. A mechanism map has been generated to characterize the predominant failure phenomena based upon collapse load criteria for face yielding, core shear and indentation. A previously developed constitutive law for the core material has been(More)
Neuronal circuits known as central pattern generators (CPG) are responsible for the rhythmic motions in animal locomotion. These circuits exploit the resonant modes of the body to produce efficient locomotion through sensory feedback. As such, the neuronal mechanisms are of interest in the control of autonomous robotic vehicles. The objective of this study(More)
For millions of years, aquatic species have utilized the principles of unsteady hydrodynamics to perform efficient, highly maneuverable and silent swimming motions. The manta ray, Manta birostris, has been identified as one such high performance species due to their ability to migrate long distances with low energy consumption, maneuver in spaces the size(More)