نتایج جستجو برای: hysteresis cycle

تعداد نتایج: 286050  

Hysteresis motor is self-starting synchronous motor that uses the hysteresis characteristics of magnetic materials to make torque. There are different methods to model this kind of motor and take into account the magnetic hysteresis characteristic of the rotor hysteresis ring. In this investigation the application of complex permeability concept is implemented to model the hysteresis loop and t...

Journal: :The Journal of the Acoustical Society of America 2014
Kevin J Parker

Hysteresis is a phenomenon that has been observed across many different materials and situations. Under small-amplitude cyclical motion, classical hysteresis designates a constant loss per cycle over a wide range of frequencies. This is also consistent with an increase in losses or attenuation with frequency that is strictly proportional to the first power of frequency. Unfortunately, the class...

Journal: :Biophysical journal 2008
Stephen Whitelam Sander Pronk Phillip L Geissler

When pulled along its axis, double-stranded DNA elongates abruptly at a force of approximately 65 pN. Two physical pictures have been developed to describe this overstretched state. The first proposes that strong forces induce a phase transition to a molten state consisting of unhybridized single strands. The second picture introduces an elongated hybridized phase called S-DNA. Little thermodyn...

2017
Longbiao Li

In this paper, the fatigue damage and lifetime of 2D SiC/SiC ceramic-matrix composites (CMCs) under cyclic fatigue loading at 750, 1000, 1100, 1200 and 1300 °C in air and in steam atmosphere have been investigated. The damage evolution versus applied cycles of 2D SiC/SiC composites were analyzed using fatigue hysteresis dissipated energy, fatigue hysteresis modulus, fatigue peak strain and inte...

2012
Manfred Lange Dennis van Vörden Rolf Möller

Measurements of the frequency shift versus distance in noncontact atomic force microscopy (NC-AFM) allow measurements of the force gradient between the oscillating tip and a surface (force-spectroscopy measurements). When nonconservative forces act between the tip apex and the surface the oscillation amplitude is damped. The dissipation is caused by bistabilities in the potential energy surface...

2009
DENNIS S. BERNSTEIN

ysteresis arises in diverse applications, including structural mechanics, aerodynamics, and electromagnetics [1]–[4]. The word “hysteresis” connotes lag, although this nomenclature is misleading since delay per se is not the mechanism that gives rise to hysteresis. As discussed in [5], hysteresis is a quasi-static phenomenon in which a sequence of periodic inputs produces a nontrivial input-out...

2004
Mamoru Tanaka

We propose a hysteresis neural network system solving NPHard optimization problems, the N-Queens Problem. The continuous system with binary outputs searches a solution of the problem without energy function. The output vector corresponds to a complete solution when the output vector becomes stable. That is, this system does never become stable without satisfying the constrains of the problem. T...

2016
Patricio E. Carrion Nima Shamsaei

This article presents the experimental data supporting the study to obtain the mean strain/stress effects on the fatigue behavior of Ti-6Al-4V ELI. A series of strain-controlled fatigue experiments on Ti-6Al-4V ELI were performed at four strain ratios (-1, -0.5, 0, and 0.5). Two types of data are included for each specimen. These are the hysteresis stress-strain responses for the cycle in a log...

2008
Rafael Wisniewski Lars F. S. Larsen

Synchronisation arises in dynamical systems that are composed of a number of interconnected subsystems. In the paper synchronization in a particular application a supermarket refrigeration system is studied. The temperature control in supermarket display cases is typically maintained by a number of distributed hysteresis controllers. Synchronization is then manifested by the opening and closing...

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