A time-dependent stop operator for modeling a class of singular hysteresis loops in a piezoceramic actuator

2013 ◽  
Vol 413 ◽  
pp. 100-104 ◽  
Author(s):  
Mohammad Al Janaideh
Keyword(s):  
Hysteresis Loops ◽  
Time Dependent ◽  
Piezoceramic Actuator ◽  
Stop Operator

A Generalized Inertial-Dependent Prandtl-Ishlinskii Model for Wide-Band Frequency Piezoelectric Actuator

2012 ◽  
Vol 622-623 ◽  
pp. 1357-1361
Author(s):  
Vahid Hassani ◽  
Tegoeh Tjahjowidodo
Keyword(s):  
Smart Materials ◽  
Hysteresis Loops ◽  
Wide Band ◽  
Industrial Applications ◽  
Nonlinear Phenomenon ◽  
Frequency Range ◽  
Band Frequency ◽  
Model Response ◽  
Stop Operator ◽  
Measured Response

Smart materials such as piezoceramics used in industrial applications, are subjected to nonlinear phenomenon of hysteresis which degrades the tracking performance of the actuator in operation. Depending on the operating frequency and input magnitude applied to the piezoelectric actuators (PA), the symmetric and asymmetric hysteresis loops can be observed. A generalized inertial-dependent Prandtl-Ishlinskii (PI) model is proposed in term of the stop operator to compensate the effects of nonlinearity in asymmetric hysteresis loops for PA. A nonlinear envelope function is assigned for the threshold of the stop operator to minimize the error between the model response and the measured response obtained through the experiments at frequency range from 200 Hz to 500 Hz.

scholarly journals Probing dynamics of nanoparticle chains formation during magnetic hyperthermia using time-dependent high-frequency hysteresis loops

2021 ◽  
Vol 119 (2) ◽  
pp. 022407
Author(s):  
N. Mille ◽  
D. De Masi ◽  
S. Faure ◽  
J. M. Asensio ◽  
B. Chaudret ◽  
...  
Keyword(s):  
High Frequency ◽  
Hysteresis Loops ◽  
Magnetic Hyperthermia ◽  
Time Dependent ◽  
Nanoparticle Chains

Time-Dependent Uniaxial Ratchetting of Ultrahigh Molecular Weight Polyethylene Polymer: Viscoelastic–Viscoplastic Constitutive Model

2016 ◽  
Vol 83 (10) ◽  
Author(s):  
Kaijuan Chen ◽  
Guozheng Kang ◽  
Chao Yu ◽  
Fucong Lu ◽  
Han Jiang
Keyword(s):  
Molecular Weight ◽  
Constitutive Model ◽  
Viscoelastic Model ◽  
Hysteresis Loops ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Time Dependent ◽  
Creep Recovery ◽  
Tension Tests ◽  
Proposed Model ◽  
Ultrahigh Molecular Weight

Uniaxial tension–unloading recovery, creep-recovery, and stress-controlled cyclic tests are first performed to investigate the recoverable viscoelasticity and irrecoverable viscoplasticity (including the uniaxial ratchetting) of ultrahigh molecular weight polyethylene (UHMWPE) polymer at room temperature. The results show that obvious time-dependent ratchetting occurs in the asymmetrical stress-controlled cyclic tension–compression and tension–tension tests of the UHMWPE, and total ratchetting strain consists of both recoverable viscoelastic and irrecoverable viscoplastic parts. Based on the experimental observation, a new viscoelastic–viscoplastic constitutive model is proposed to describe the time-dependent ratchetting of the UHMWPE. In the proposed model, the viscoplastic strain is set to be contributed simultaneously by the unified viscoplastic and creep ones. Meanwhile, a memory surface is introduced into the viscoelastic model to improve the description to the shapes of stress–strain hysteresis loops. Finally, the proposed model is verified by comparing the predictions with the corresponding experimental results of the UHMWPE. It is clearly demonstrated that the proposed model predicts the creep, viscoelastic recovery, and uniaxial time-dependent ratchetting of the UHMWPE well.

scholarly journals Insight into dynamic magnetic properties of YMnO3/FM bilayer in a time-dependent magnetic field

2021 ◽  
Author(s):  
Chun-lu Chang ◽  
Wei Wang ◽  
Dan Lv ◽  
Zhen-yu Liu ◽  
Ming Tian
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Dynamic Properties ◽  
Hysteresis Loops ◽  
Time Dependent ◽  
Blocking Temperature ◽  
Physical Parameters ◽  
Present System ◽  
Mixed Spin ◽  
Insight Into

Abstract Based on the Monte Carlo simulation, a mixed-spin (5/2, 2, 3/2) Ising model is constructed to investigate the dynamic magnetic properties of antiferromagnetic/ferromagnetic YMnO 3 /FM bilayer under the existence of a time-dependent magnetic field. The effects of exchange interaction, oscillating magnetic field as well as temperature are involved in this work. Masses of numerical results of the dynamic order parameter, susceptibility, internal energy, and blocking temperature are obtained with diverse physical parameters. Moreover, the phase diagrams and the hysteresis loops of the system are discussed in detail as well for a better understanding of the dynamic properties of the present system.

Compensation of Hystetresis Nonlinearties in Smart Actuators

2008 ◽  
Author(s):  
Mohammad Al Janaideh ◽  
Subash Rkaheja ◽  
Chun-Yi Su
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Hysteresis Loops ◽  
Experimental Results ◽  
Piezoceramic Actuator ◽  
Sma Actuators ◽  
Smart Actuators ◽  
Play Operator

Smart actuators such shape memory alloy (SMA) actuators and piezoceramic actuators exhibit different hysteresis loops. In this paper, a generalized Prandtl-Ishlinskii model is utilized for modeling and compensation of hysteresis effects in smart actuators. In the formulated model, a generalized play operator together with a density is integrated to form the generalized Prandtl-Ishlinskii model. The capability of the formulated model to characterize hysteresis in smart actuators is demonstrated by comparing its outputs with experimental results obtained from different smart actuators. Furthermore, an analytical inverse of the generalized Prandtl-Ishlinskii model is derived for compensations in different smart actuators. Such compensation is experimentally illustrated by piezoceramic actuator.

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