نتایج جستجو برای: hysteresis

تعداد نتایج: 13062  

2016
Vojko Matko Miro Milanovic

A new method for the automated measurement of the hysteresis of the temperature-compensated inductance-to-frequency converter with a single quartz crystal is proposed. The new idea behind this method is a converter with two programmable analog switches enabling the automated measurement of the converter hysteresis, as well as the temperature compensation of the quartz crystal and any other circ...

2009
M Zareinejad S M Rezaei H H Najafabadi M Saadat

In this article, a novel control method is proposed for feedforward compensation of hysteresis non-linearity in various frequency ranges. By integrating a multirate hysteresis compensator controller with PID feedback control, a combined controller is developed and experimentally validated for a piezoelectric micro-positioning system. Piezoelectric materials show non-linear hysteresis behaviour ...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2016
O Gutfleisch T Gottschall M Fries D Benke I Radulov K P Skokov H Wende M Gruner M Acet P Entel M Farle

Hysteresis is more than just an interesting oddity that occurs in materials with a first-order transition. It is a real obstacle on the path from existing laboratory-scale prototypes of magnetic refrigerators towards commercialization of this potentially disruptive cooling technology. Indeed, the reversibility of the magnetocaloric effect, being essential for magnetic heat pumps, strongly depen...

2009
Roel Merry Mustafa Uyanik René van de Molengraft Richard Koops Marijn van Veghel Maarten Steinbuch

Atomic Force Microscopes (AFMs) are widely used for the investigation of samples at the nanometer scale. The metrological AFM used in this work uses a 3 degrees-of-freedom (DOFs) stage, driven by piezo-stack actuators, for sample manipulation in combination with a fixed cantilever. The piezostack actuators suffer from hysteresis, which acts as a nonlinear disturbance on the system and/or can ch...

2009
Kenton Kirkpatrick John Valasek

The ability to actively control the shape of aerospace structures has led to the implementation of Shape Memory Alloy actuators. These actuators can be used for morphing or shape control by modulating their temperature, which is effectively done by applying a voltage difference across their length. Characterization of this temperaturestrain relationship is currently done using constitutive mode...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Wei Sha Jonathan Moore Katherine Chen Antonio D Lassaletta Chung-Seon Yi John J Tyson Jill C Sible

Cells progressing through the cell cycle must commit irreversibly to mitosis without slipping back to interphase before properly segregating their chromosomes. A mathematical model of cell-cycle progression in cell-free egg extracts from frog predicts that irreversible transitions into and out of mitosis are driven by hysteresis in the molecular control system. Hysteresis refers to toggle-like ...

Journal: :Circulation Research 2004

Journal: :Finance and economics discussion series 2021

In this paper we identify demand shocks that can have a permanent effect on output through hysteresis effects. We call these shocks. They are found to be quantitatively important in the United States, particular when Great Recession is included sample. Recessions driven by lead decline employment and investment, while per worker largely unaffected. find strong evidence transmits rise lon...

2017
Jun Zhang Michael C. Yip

Being inherently compliant, the robotic artificial muscles are increasingly popular in applications such as safe human-robot interaction, legged robotics, prostheses and orthoses, and soft robotics. Their full utilization is often challenged by the coupled hysteresis among input, strain, and tension force. Although conventional two-dimensional hysteresis models are available, no prior studies o...

Journal: :JACIC 2009
Kenton Conrad Kirkpatrick John Valasek

The ability to actively control the shape of aerospace structures has spawned the use of shape memory alloy actuators. These actuators can be used for morphing or shape control by modulating their temperature, which is effectively done by applying a voltage difference across their length. Characterization of this temperature–strain relationship is currently done using constitutive models, which...

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