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We have investigated the ability of humans to stabilize their heads in space and assessed the influence of mental set and the relative importance of visual and vestibular cues. Ten normal subjects and 3 patients with bilateral vestibular loss were studied. Subjects were fixed firmly to the chair of a turntable facing a screen on which was projected a target(More)
Conventional passive constrained layer damping treatments with visco-elastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. Two configurations of the resulting hybrid treatment are considered in this paper. In the first configuration the active control and passive(More)
This paper presents the stability analysis of the leading edge spar of a flapping wing unmanned air vehicle with a compliant spine inserted in it. The compliant spine is a mechanism that was designed to be flexible during the upstroke and stiff during the downstroke. Inserting a variable stiffness mechanism into the leading edge spar affects its structural(More)
  • Michael Adam Marana, Alison Flatau, Sung Lee Professor, Norman Wereley
  • 2012
A magnetostrictive sensor was designed, constructed, and evaluated for use as flow or tactile sensor. Vibrissa-like beams (whiskers) were cut from sheets of the magnetostrictive iron-gallium alloy, Galfenol. These beams were cantilevered, with the fixed end of the whisker attached to a permanent magnet to provide the whisker with a magnetic bias. The free(More)
  • Jason J Smoker, Amr Baz, Balachandran Professor, Nikhil Chopra, Sarah Bergbreiter, Norman Wereley +2 others
  • 2012
Metamaterials are artificial materials engineered to provide properties which may not be readily available in nature. The development of such class of materials constitutes a new area of research that has grown significantly over the past decade. Acoustic metamaterials, specifically, are even more novel than their electromagnetic counterparts arising only(More)
A bidirectionally coupled magnetoelastic model (BCMEM) has been extended to include electric currents in its magnetic finite element formulation. This enables the model to capture the magnetoelastic behavior of magnetostrictive materials subjected to elastic stresses and magnetic fields applied not only by permanent magnets but also by current carrying(More)
This thesis describes performance testing of 3W Modellmotoren's 100i-B2 which is a two-stroke gasoline engine presently being used to power a commercially produced Unmanned Air Vehicle (NAVMAR's Mako). Since the engine was originally manufactured for use in radio controlled model aircraft, the only performance information provided by the manufacturer is its(More)
Flapping wings may have potential for success in the realm of micro air vehicles (MAVs). The goal of this thesis was to investigate a variety of flapping wing planforms, including nonplanar effects, to create an optimum planform for an MAV design. Test stand and model prototype experiments were conducted to measure the lift and propulsive thrust generated(More)
  • Kevin R Uleck, Anthony J Vizzini, N Wereley, S W Lee, Professor A Flatau, H Bruck
  • 2006
A major limitation of current fatigue life prediction methods for polymer matrix composite laminates is that they rely on empirical S-N data. In contrast to fatigue life prediction methods for metals which are based on physical crack growth models, the heart of fatigue life models for composites is empirical S-N data for each specific material system and(More)
  • Anne Brindejonc, Inderjit Chopra, Jayant Sirohi, Co-Advisor Professor, Roberto Celi, Norman Wereley
  • 2005
This thesis presents the design, fabrication, testing and analytical study of a autonomous autorotative payload delivery system called the Autobody. The Autobody must be capable of passively deploying a payload, consisting of an electronics package, on ground from a conventional aircraft, by means of an autorotative rotor. Operational requirements specify(More)