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Showing 1 to 20 of 150 for “"bistable"”.
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Theoretical Study of Bistable Systems
… of spin-crossover (SCO) complexes, archetype of bistable molecules, with two accessible spin states that can be tuned by external stimuli such as temperature or light. Spin-crossover complexes are potential candidates for applications in information storage, spintronics and molecular electronics. …
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Piezoresistive Sensing of Bistable Micro Mechansim State
… the feasibility of on-chip sensing of bistable mechanism state using the piezoresistive properties of polysilicon, thus eliminating the need for electrical contacts. Changes in position are detected by observing changes in resistance across the mechanism. Sensing the state of bistable …
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Development of In-Plane Compliant Bistable Microrelays
Bistable microrelays have many possible applications and have the potential to reduce the size, weight, power consumption, and cost of products in which they are used. This research outlines the current state of microrelays, presents three new compliant bistable micromechanisms, and characterizes …
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A Self-Retracting Fully-Compliant Bistable Micromechanism
… a class of Self-Retracting Fully-compliant Bistable Micromechanisms (SRFBM). Fully-compliant mechanisms are needed to overcome the inherent limitations of microfabricated pin joints, especially in bistable mechanisms. The elimination of the clearances associated with pin joints will allow …
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Phase Plane Theory of Transistor Bistable Circuits
Made available in DSpace on 2014-12-04T21:03:40Z (GMT). No. of bitstreams: 1 6402950.pdf: 6378440 bytes, checksum: fa53b1c894f16dde7259b81b699830f1 (MD5) Previous issue date: 1963
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β-Globin Enhancers Regulate Bistable Gene Expression States
… enhancers. Thus, β-globin enhancers regulate bistable gene expression states, supporting the failure rate model of enhancer redundancy in human cells.
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BISTABLE STRUCTURES ENABLE PASSIVE TRANSITIONS IN MOBILE ROBOTS
… thesis, we investigate robotic applications of bistable mechanisms, mechanical structures that exhibit two stable static equilibria, to enable passive actuation and locking for systems with discrete task modes. More specifically, the main theoretical contribution of this thesis is a method for …
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Mathematical models for bistable nematic liquid crystal displays
Bistable Liquid Crystal Displays (LCDs) offer the potential for considerable power savings, compared with conventional (monostable) LCDs. The existence of two (or more) stable field-free states that are optically-distinct means that contrast can be maintained in a display without an …
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Characterizing the Three-Dimensional Behavior of Bistable Micromechanisms
Compliant bistable micromechanisms have been proposed for use in applications such as switches, relays, shutters, and sensing arrays. Unpublished laboratory testing suggests that off-axis forces may affect the bistable nature of fully compliant bistable micromechanisms (FCBMs). The actuation forces …
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On-Chip Actuation of Compliant Bistable Micro-Mechanisms
Two compliant bistable micro-mechanisms have been developed which can be switched in either direction using on-chip thermal actuation. The energy storage and bistable behavior of the mechanisms are achieved through the elastic deflection of compliant segments. The pseudo-rigid-body model was used …
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Characterizing chaos in a hybrid optically bistable device.
… oscillations are easily seen with an optically bistable device with a delay in the feedback. The device is a hybrid, having both optical and electronic components. The details of the time-dependent output are investigated. In particular, as the input intensity is increased, the device output …
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Bistable Auxetic System -- Programming synclastic curvature into 2D Patterning
This research aims to provide a new way of thinking about the ever-expanding quest in architecture to deliver free-form geometry. Rather than relying on complex formwork, the proposed reconfigurable system can translate free form synclastic surfaces to pre-programmed 2D configuration, providing an …
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An electrothermally-actuated bistable MEMS relay for power applications
This thesis first develops a bistable mechanism that does not rely on internal stress or hinges for its bistability, which is then combined with transient electrothermal actuation and contact structure to develop a MEMS relay for power switching. The relay components, fabricated by a through etch …
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Bistable prestressed spring steel grippers for aerial perching and grasping
… location for a desired amount of time. Compliant bistable mechanisms are well-suited for this application because of their adaptability in a wide range of environments while utilizing bistability to reduce energy consumption and complexity. Current research into aerial perching with compliant …
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Design of repeating projectile toy based on bistable spring propulsion
Recently, bistable springs have been proven as a viable propulsion method for the standard 1.75" foam balls used in Nerf® projectile toys. This technology was developed at M.I.T. by William Fienup and Barry Kudrowitz, who designed a single-shot hand-popper that utilized a large bistable spring. The …
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Fully Compliant Tensural Bistable Mechanisms (FTBM) with On-Chip Thermal Actuation
<p>The Fully compliant Tensural Bistable Mechanism (FTBM) class is introduced. The class consists of fully compliant linear bistable mechanisms that achieve much of their displacement and bistable behavior through tension loading of compliant segments. Multiple topologies of designs arising from …
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A Capacitively Coupled Bistable Gas Discharge Cell for Computer Controlled Displays
Made available in DSpace on 2014-12-08T22:24:08Z (GMT). No. of bitstreams: 1 6706776.pdf: 1900223 bytes, checksum: 2dca6b85997171a4b182751293c77f4c (MD5) Previous issue date: 1966
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Studies on hybrid optical bistable devices using an acousto-optic modulator
Acousto-optic hybrid bistable devices have been studied previously. However, previous studies are limited only to the first-Bragg regime involving two diffracted orders. No actual comparison has been made between experimental results and theoretical predictions. A model including both acousto-optic …
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Identification of Macro- and Micro-Compliant Mechanism Configurations Resulting in Bistable Behavior
… of several mechanism classes which result in bistable behavior. Bistable mechanisms have use in many applications, such as switches, clasps, closures, hinges, and so on. A powerful method for the design of such mechanisms would allow the realization of working designs much more easily than has …
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