Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"Nanopositioning"”.
-
Flexure-based nanopositioning systems : integrated design and control
… manufacturing. Such applications necessitate nanopositioning systems that satisfy critical functional requirements, such as load-capacity, bandwidth, resolution, and range. Therefore, a systematic approach for design and control is an important tool for research and development for …
-
Design and fabrication of a multipurpose compliant nanopositioning architecture
… costs. This will allow for low-cost customizable nanopositioning architectures with integrated position sensing to be created for a range of micro-/nano- manufacturing and metrology applications. A Hexflex 6DOF nanopositioner with titanium flexures and integrated siliconpiezoresistive sensing was …
-
Design of a precise X-Y-Theta nanopositioning optical sensor
… absolute and relative position of an x-y-[theta] nanopositioning stage for use in the metrology of microfluidic devices during and after manufacturing. The position sensing system consists of a visible-light high-speed area camera, a target pattern, and image processing software. The target …
-
Design, fabrication and mechanical optimization of a flexural high speed nanopositioning imaging stage
The intent of this research is to generate the knowledge required to design, fabricate and operate a device capable of high speed nano-scale vertical positioning of microscopy samples. The high speed focusing device (HSFD) created during this research utilizes a new combination of technologies for …
-
Nanotechnology: a systems and control approach
… developed by Bogoliubov and Mitropolski. In the nanopositioning front, through the design and implementation of nanopositioning devices, a new paradigm for the systematic design of nanopositioners with specific bandwidth, resolution and robustness requirements is presented. Many tools from modern …
-
Design of a low-cost meso-scale, detachable fixturing system for probe-based nanomanufacturing equipment and instruments
… system will be applied specifically to a nanopositioning system developed for the functionalization of DNA via dip pen nanolithography. A ball and groove kinematic coupling design was modified by the addition of flexural hinges to reduce the offset of friction on the coupling interface, …
-
The Piezoresistive Effect In Microflexures
… sensors, feedback control of microdevices, nanopositioning, and self-sensing microdevices.
-
X-ray microscope performance enhancement through control architecture change
… control algorithms to improve the performance of nanopositioning devices used on the beamline in Advanced Photon Source (APS) at Argonne National Laboratory (ANL). A prototype device, better known as the Early User Instrument (EUI) was the subject of this work. It consists of X-ray optics stage …
-
Harmonic poly-actuator : design and control of a new piezoelectric mechanism
… devices relies on friction and is limited to nanopositioning. In this thesis, we investigate combining a unique mechanical amplification with a frequency amplification device that does not rely on friction to produce an arbitrarily large stroke linear actuator. The first stage of amplification …
-
Application of field programmable analog arrays (FPAAs) to fast scanning probe microscopy
… Therefore AFMs are required to have very fast nanopositioning systems. However, high-bandwidth requirement on the positioning system poses fundamental limitations on the image resolution. The resolution of an image depends on the controller’s capabilities to attenuate the measurement noises. …
-
Dual-stage Thermally Actuated Surface-Micromachined Nanopositioners
… of recent research in micropositioning and nanopositioning is presented to set the background for this work. This research project demonstrates that a dual-stage nanopositioner can be created with microelectromechanical systems technology such that the two stages are integrated on a single …
-
Dynamics and Control of Smart Structures for Space Applications
… and control of piezoelectric actuators for nanopositioning applications. A state feedback integral plus double integral synchronization controller is designed to allow the piezoelectrics to form the basis of an ultra-precise 2-D Fabry-Perot interferometer as the gap spacing of the device …
-
Novel quantum dot and nano-entity photonic structures
… was established comprising computer controlled nanopositioning and laser beam control, as well as various prototype materials synthesis and fabrication devices. QD/polymer computer generated holograms, waveguides and micro-ring structures were simulated, designed and fabricated. Specific …
-
A new dynamic mode for fast imaging in atomic force microscopes
… significant with the advent of high-speed nanopositioning stages and electronics. The design is accomplished by model-based force regulation that utilizes the fast cantilever deflection signal instead of its slower derivative signals used in existing methods. The control design uses the …
-
Analysis and design of rapid prototyped mechanisms using hybrid flexural pivots
… engineering. For an instance, a great number of nanopositioning systems are made out of flexures. Examples of these systems are those used in scanning probe microscopy and many other types of metrology tools. Not having friction is a requirement to achieve nanometer scale motion and thus flexural …
-
Design and implementation of high-bandwidth, high-resolution imaging in atomic force microscopy
Video-rate imaging with subnanometer resolution without compromising on the scan range has been a long-awaited goal in Atomic Force Microscopy (AFM). The past decade saw significant advances in hardware used in atomic force microscopes, which further enable the feasibility of high-speed Atomic …
-
Advanced control of MEMS probing devices
This work is aimed at developing a control-system theoretic approach for addressing certain performance issues that arise in micro-electro-mechanical systems (MEMS). In particular, it focuses on applications such as nano-positioning, where control design becomes necessary to meet high resolution, …
-
A 2 degree-of-freedom SOI-MEMS translation stage with closed loop positioning
This research contains the design, analysis, fabrication, and characterization of a closed loop XY micro positioning stage. The XY micro positioning stage is developed by adapting parallel-kinematic mechanisms, which have been widely used for macro and meso scale positioning systems, to …
-
Sparse Aperture Speckle Interferometry Telescope Active Optics Control System
<p>A conventional large aperture telescope required for binary star research is typically cost prohibitive. A prototype active optics system was created and fitted to a telescope frame using relatively low cost components. The active optics system was capable of tipping, tilting, and elevating the …
-
Control-systems based analysis and design methods for scanning probe microscopy
Recent demonstrations of nanoscience provide ample evidence indicating the feasibility of rational control, manipulation and interrogation of matter at the atomic scale. A class of devices, with micro-sized sensor probes, called Scanning Probe Microscopes (SPMs) are in the forefront of the …
Page 1 of 2