نتایج جستجو برای: hysteresis

تعداد نتایج: 13062  

2013
Peter Iványi

Preliminary notes The Preisach hysteresis model is widely used in different engineering disciplines, for example: electrical engineering, mechanical engineering and so on. The Preisach model is a unique tool to describe in a mathematical consistent way the hysteresis phenomenon with non-linearities and memories. The Preisach hysteresis model is discrete, however this paper presents a continuous...

2006
Ashutosh Shastry Aziel Epilepsia Marianne J. Case Shaghayegh Abbasi Karl F. Böhringer

This paper presents the fabrication of rough super-hydrophobic surfaces, dynamic measurements of sliding angles of water droplets, and a modeling approach to estimate bounds on contact angle hysteresis—the major dissipative mechanism in droplet based microfluidic systems. We investigate the dependence of hysteresis on texture parameters, evaluate the current model, propose a modification, and s...

2013
Sining Liu

Motion Control of Smart Material Based Actuators: Modeling, Controller Design and Experimental Evaluation Sining Liu, Ph.D. Concordia University, 2013 Smart material based actuators, such as piezoelectric, magnetostrictive, and shape memory alloy actuators, are known to exhibit hysteresis e ects. When the smart actuators are preceded with plants, such non-smooth nonlinearities usually lead to p...

2012
J. H. Park

We propose an integral tracking control method for a piezoelectric actuator system. The proposed method achieves the output tracking without requiring any hysteresis observer or schemes to compensate the hysteresis effect. With the proposed control law, the system is converted into the standard singularly perturbed model. Using Tikhonov’s theorem, we guarantee that the tracking error can be red...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2011
Prabodh Shukla R S Kharwanlang

We study zero-temperature hysteresis in random-field XY and Heisenberg models in the zero-frequency limit of a cyclic driving field. We consider three distributions of the random field and present exact solutions in the mean-field limit. The results show a strong effect of the form of disorder on critical hysteresis as well as the shape of hysteresis loops. A discrepancy with an earlier study b...

Journal: :international journal of civil engineering 0
h. bahrampoor iran-tehran s. sabouri-ghomi k. n. toosi university

from the time that civil engineers have used steel in building structures, they tried to increase its strength so as to produce more economic and lighter structures by using more elegant sections. increase of steel strength is not always useful for all members of a steel structure. in some members under certain conditions, it is needed to reduce the strength as much as possible to improve the b...

Journal: :تحقیقات مهندسی کشاورزی 0
فوژان بدیعی استادیار پژوهش مؤسسه تحقیقات فنی و مهندسی کشاورز عسگر فرحناکی استادیار بخش علوم و صنایع غذایی دانشکده کشاورزی دانشگاه شیراز هما بهمدی عضو هیأت علمی مؤسسه تحقیقات فنی و مهندسی کشاورزی

gaz-angubin is a sweet exudate naturally produced by an insect from the gavan-e-gaz-angubin plant. adsorption and desorption isotherms for a gaz-angubin sample were determined at 15° and 25°c over a range of relative humidity from 0 to 90% using a dynamic vapor sorption system. at different levels of relative humidity, changes in sample mass were continuously measured versus time and described ...

Journal: :journal of current ophthalmology 0
هادی استادی مقدم hadi ostadimoghaddam محمدرضا صداقت mohammad reza sedaghat سیدحسین حسینی یزدی seyyed hosein hoseini yazdi حامد نیازمند hamed niyazmand

purpose : to investigate the correlation between corneal biomechanical properties and tomographic parameters of pentacam methods : corneal biomechanical properties and tomographic results of 36 normal subjects were measured by ocular response analyzer (ora) and pentacam and the correlation between these two measurements were analyzed with pearson correlation test with spss version16. results : ...

Journal: :Journal of Economic Perspectives 1992

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