In some systems with hysteresis behavior like Shape Memory Alloy (SMA) actuators and Piezo actuators, we essentially need an accurate modeling of hysteresis either for controller design or performance evaluation. One of the most interesting Hysteresis non-linearity identification methods is Preisach model in which hysteresis is modeled by linear combination of elemental operators. Despite good ...

The present paper will describe an approach for the simultaneous real-time compensation of hysteresis, creep and force-dependence effects of a piezoelectric stack actuator by a feed-forward controller. The basis of the feed-forward controller is given by so-called complex creep and hysteresis operators, which when adequately implemented, lead to a precise model of the creep and hysteresis chara...

Unsaturated soils exhibit water retention hysteresis, with different behaviour during drying and wetting paths. Water hysteresis has often been modelled using expressions for the main curves that are unsatisfactory at low values of degree saturation. In addition, effect on unsaturated hydraulic conductivity typically not explicitly considered. This paper presents a new hysteretic constitutive m...

Although the preferred transition speed (PTS) reported by various researchers is relatively consistent, the amount of observed hysteresis (difference between the walk-run and the run-walk transition speed) varies considerably. Variations in reported hysteresis appear to be related to the protocol used to determine the transition speeds. This investigation compared the PTS, and the amount of hys...

Large changes in hysteresis are reported as a function of applied stress under thermal cycling experiments in NiTi single crystals. In the low Ni alloy the thermal hysteresis expanded with increasing stress while in the high Ni alloy the thermal hysteresis contracted with increasing stress. The results in both cases meet the limit obtained from Differential Scanning Calorimetry at zero stress. ...

Abstract This contribution aims at introducing first steps to develop hysteresis operator type inelastic constitutive laws for Cosserat rods the simulation of cables composed complex interior components. Motivated by basic elements rod theory, we a specific approach modelling adapted this application. Afterwards, describe hysteretical behaviour arising from cyclic bending experiments on means P...

The haemolymph of larvae of Tenebrio molitor contains a factor which produces a thermal hysteresis (a difference between the freezing and melting points) of approximately 0-75 °C. When larvae were acclimated to low temperatures or short photoperiod the thermal hysteresis increased more than twofold. Coincident with the increase in thermal hysteresis the supercooling points and lower lethal temp...

1 NAKAGAWA, s., and SAITO,T.: ‘An RC OTA hysteresis chaos generator’, IEEE Trans. Circuits Syst. I, 1996, CAS-43, (12), pp. 10 19-1 02 1 2 STORACE, M., PARODI, M., and ROBATTO, D.: ‘A hysteresis-based chaotic circuit: dynamics and applications’, Int. J. Circuit Theory Appl., 1999, 27, (6), pp. 527-542 ELWAKIL, A s . , and KENNEDY, M.P.: ‘Systematic realization of a class of hysteresis chaotic o...

In this paper, how structure-sensitive parameters derived from the hysteresis loop, like coercive field, remanent induction, and hysteresis losses, can be used to characterise recovery and recrystallization in cold rolled Ti-Nb stabilised interstitial free ultra low carbon steel is shown. The effect on hysteresis measurements of isothermal annealing treatments applied to industrially cold rolle...

Ion migration has been proposed as a possible cause of photovoltaic current-voltage hysteresis in hybrid perovskite solar cells. A major objection to this hypothesis is that hysteresis can be reduced by changing the interfacial contact materials; however, this is unlikely to significantly influence the behaviour of mobile ionic charge within the perovskite phase. Here, we show that the primary ...