Results 121 to 130 of about 762 (173)
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Nanopositioning for Polarimetric Characterization
Journal of Nanoscience and Nanotechnology, 2008A positioning system with approximately nanometer resolution has been developed based on a new implementation of a motor-driven screw scheme. In contrast to conventional positioning systems based on piezoelectric elements, this system shows remarkably low levels of drift and vibration, and eliminates the need for position feedback during typical data ...
Naser, Qureshi +3 more
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Nanopositioning for probe storage
Proceedings of the 2005, American Control Conference, 2005., 2005Scanning-probe data-storage devices are currently being explored as alternatives to conventional data storage. Ultra-high density, small form factor, and low cost are thought to be the primary advantages of probe storage. The ultra-high a real density makes nanopositioning a significant challenge in probe storage.
Abu Sebastian +5 more
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Impulsive control for nanopositioning
Proceedings of the 14th international conference on Hybrid systems: computation and control, 2011In this paper, impulsive control is applied to a class of linear feedback systems and studied both theoretically and experimentally, with a particular focus on the usage in nanopositioning. By using impulsive control, improvements in tracking performance and tolerance to measurement noise can be achieved which are beyond the limits of conventional ...
Tomas Tuma +3 more
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Impulsive control for fast nanopositioning
Nanotechnology, 2011In this paper we present a non-linear control scheme for high-speed nanopositioning based on impulsive control. Unlike in the case of a linear feedback controller, the controller states are altered in a discontinuous manner at specific instances in time.
Tomas, Tuma +4 more
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Nanopositioning performance of MIMO MPC
2015 10th Asian Control Conference (ASCC), 2015Model predictive control (MPC) refers to a class of computer control algorithms which is commonly used when tracking a reference trajectory is the primary goal. It minimizes the steady-state tracking error, increases the closed-loop bandwidth, and enables the controller to track a reference signal, the major requirements for nanopositioning ...
M. S. Rana 0001 +2 more
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Friction compensation for Nanopositioning and Nanomeasuring Machines
2010 11th IEEE International Workshop on Advanced Motion Control (AMC), 2010The presented work concerns the modeling and experimental verification of the highly nonlinear behavior in positioning on the nanometer scale. The main goal of this work is to identify and extend a simple dynamic friction model, which allows a model-based estimation of the friction force including the system inertia only based on a displacement input ...
Amthor, A. +2 more
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Nanopositioning for storage applications
Annual Reviews in Control, 2011Abstract In nanotechnology applications, nanopositioning, i.e., nanometer-scale precision control at dimensions of less than 100 nm, plays a central role. One can view nanopositioners as precision mechatronics systems aiming at moving objects over a certain distance with a resolution that could be as low as a fraction of an Angstrom.
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A MEMS Stage for 3-Axis Nanopositioning
2007 IEEE International Conference on Automation Science and Engineering, 2007Applications in micro and nanotechnologies require millimeter-sized devices that are capable of 3-axis positioning with motion ranges of micrometers and resolutions of nanometers. This paper reports on the design, fabrication, and testing of a MEMS-based 3-axis positioning stage.
Xinyu Liu 0002 +2 more
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Nanomeasuring and nanopositioning engineering
SPIE Proceedings, 2006Abstract The paper describes traceable nanometrology based on a nanopositioning machine with integrated nanoprobes. The operation of a high-precision long range three-dimensional nanopositioning and nanomeasuring machine (NPM-Machine) having a resolution of 0.1 nm over the positioning and measuring range of 25 mm × 25 mm × 5 mm is explained.
G. Jäger +6 more
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NanoPositioning – extreme calibration
Assembly Automation, 1996NanoPositioning is a combination of piezoelectric ceramics, capacitance sensors and flexure hinges, and is the art of positioning in space with resolutions of one nanometre and less. Describes the technologies involved and how they are applied to the growing demand for precision mechanisms.
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