Results 1 - 10 of 11798
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[en] The dynamic Takács model is used for the description of hysteresis loops in a thick non-oriented steel sheet. The extended description is achieved by a modification of the relationship for the effective field. The proposed model extension is equivalent to the famous Chua description.
[en] A generalized Prandtl–Ishlinskii (PI) model has been proposed in Al Janaideh et al (2009 Smart Mater. Struct. 18 045001) to describe the asymmetric hysteresis in smart actuators. Because the wiping out and congruency properties are essential for the validity of hysteresis models and have not been mentioned in Al Janaideh et al (2009 Smart Mater. Struct. 18 045001), in this note these properties for this generalized model are investigated and confirmed in detail. (technical note)
[en] This paper presents a novel type of magneto-rheological (MR) actuator called a bi-directional magneto-rheological (BMR) actuator and accurate torque control results considering both hysteresis and friction compensation. The induced torque of this actuator varies from negative to positive values. As a result, it can work as either a brake or a clutch depending on the scheme of current input. In our work, the configuration of the actuator as well as its driving system is presented first. Subsequently, a congruency hysteresis based (CBH) model to take account of the effect of the hysteresis is proposed. After that, a compensator based on this model is developed. In addition, the effect of dry friction, which exists inherently with MR actuators in general, is also considered. In order to assess the effectiveness of the hysteresis compensator, several experiments on modeling and control of the actuator with different waveforms are carried out. (paper)
[en] A simple experiment for determining the nonlinear stress–strain relation of duct tape is described. After weights are added and subsequently removed, the tape does not return to its original state and is no longer taut. The tape exhibits hysteresis, which implies the loss of work during the cyclical process. The exponent describing the nonlinearity is related to the fractional work loss. (paper)
[en] This work points out the origin of the convergence problem when the Jiles-Atherton hysteresis model is associated with the finite elements method (FEM) to analyze electromagnetic devices. To overcome this problem, a restriction is proposed and applied in the classical approach for the determination of the Jiles-Atherton hysteresis model parameters process. The presented methodology considers the inverse model, where the magnetic induction is the input variable and the magnetic field is the output variable.