Results 11 to 20 of about 31,408 (262)
Relaxation in Population Dynamics Models with Hysteresis [PDF]
SIAM Journal on Control and Optimization, 2021 The present paper is concerned with a nonlinear partial differential control system subject to a state-dependent and nonconvex control constraint. This system models the dynamics of populations in the vegetation--prey--predator framework and takes account of diffusive and hysteresis effects appearing in the process.
Sergey A. Timoshin, Toyohiko Aiki
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A dynamic model for magnetostrictive hysteresis [PDF]
Proceedings of the 2003 American Control Conference, 2003., 2004 The rate-dependent hysteresis present in thin magnetostrictive actuators can be captured by a dynamic model, consisting of a Preisach operator coupled to an ordinary differential equation in an unusual way. The model presents interesting problems in analysis and computation due to its special structure. In this paper we first transform the model into a
Tan, Xiaobo +2 more
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Dynamic hysteresis in finemet thin films [PDF]
IEEE Transactions on Magnetics, 2003 We performed a series of dynamic hysteresis measurements on three series of Finemet films with composition Fe$_{73.5}$Cu$_1$Nb$_3$Si$_13.5$B$_9$, using both the longitudinal magneto-optical Kerr effect (MOKE) and the inductive fluxometric method. The MOKE dynamic hysteresis loops show a more marked variability with the frequency than the inductive ones,
S. ZAPPERI +5 more
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Frontiers in Materials, 2019 Magnetorheological elastomer (MRE) is one of the most promising smart materials with excellent magnetic-control mechanical properties. This work focuses on the study of the dynamic mechanical properties of MRE under cyclic loadings and periodic magnetic ...
Yunfei Zhang +6 more
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Model Reference Adaptive Control of Cross-Coupling Hysteresis in Piezoceramics With Dynamic Loads
IEEE Access, 2022 During the ultraprecise cutting of micro-structure surface with fast tool servo (FTS), the hysteresis of piezoelectric actuators (PEAs) are affected by dynamic voltage excitations and real-time cutting force, which declines the servo accuracy and cutting
Lue Zhang +3 more
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Drones, 2023 The fast piezo-driven scanner (FPDS) compensates for vibrations in the unmanned aerial vehicle (UAV) image stabilization system. However, the hysteresis nonlinearity reduces the positioning accuracy of the FPDS.
Jinlei Lu +3 more
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Micromachines, 2023 To improve the machining quality of the non-resonant elliptical vibration cutting (EVC) device, a compound control method for trajectory error compensation is proposed in this paper.
Chen Zhang +4 more
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Dynamic transitions and hysteresis [PDF]
Reviews of Modern Physics, 1999 When an interacting many-body system, such as a magnet, is driven in time by an external perturbation, such as a magnetic field,the system cannot respond instantaneously due to relaxational delay. The response of such a system under a time-dependent field leads to many novel physical phenomena with intriguing physics and important technological ...
Chakrabarti, Bikas K., Acharyya, Muktish
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Dynamical Hysteresis without Static Hysteresis: Scaling Laws and Asymptotic Expansions [PDF]
SIAM Journal on Applied Mathematics, 1997 Summary: We study dynamical hysteresis in a simple class of nonlinear ordinary differential equations, namely first-order equations subject to sinusoidal forcing. The assumed nonlinearities are such that the area of the hysteresis loop vanishes as the forcing frequency tends to zero; in other words, there is no static hysteresis.
Fernando Broner +2 more
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Scaling dynamic response and destructive metabolism in an immunosurveillant anti-tumor system modulated by different external periodic interventions. [PDF]
PLoS ONE, 2011 On the basis of two universal power-law scaling laws, i.e. the scaling dynamic hysteresis in physics and the allometric scaling metabolism in biosystem, we studied the dynamic response and the evolution of an immunosurveillant anti-tumor system subjected
Yuanzhi Shao +3 more
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