The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform
Fanrang Kong - One of the best experts on this subject based on the ideXlab platform.
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stochastic resonance in an Underdamped System with pinning potential for weak signal detection
Sensors, 2015Co-Authors: Haibin Zhang, Qingbo He, Fanrang KongAbstract:Stochastic resonance (SR) has been proved to be an effective approach for weak sensor signal detection. This study presents a new weak signal detection method based on a SR in an Underdamped System, which consists of a pinning potential model. The model was firstly discovered from magnetic domain wall (DW) in ferromagnetic strips. We analyze the principle of the proposed Underdamped pinning SR (UPSR) System, the detailed numerical simulation and System performance. We also propose the strategy of selecting the proper damping factor and other System parameters to match a weak signal, input noise and to generate the highest output signal-to-noise ratio (SNR). Finally, we have verified its effectiveness with both simulated and experimental input signals. Results indicate that the UPSR performs better in weak signal detection than the conventional SR (CSR) with merits of higher output SNR, better anti-noise and frequency response capability. Besides, the System can be designed accurately and efficiently owing to the sensibility of parameters and potential diversity. The features also weaken the limitation of small parameters on SR System.
Haibin Zhang - One of the best experts on this subject based on the ideXlab platform.
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stochastic resonance in an Underdamped System with pinning potential for weak signal detection
Sensors, 2015Co-Authors: Haibin Zhang, Qingbo He, Fanrang KongAbstract:Stochastic resonance (SR) has been proved to be an effective approach for weak sensor signal detection. This study presents a new weak signal detection method based on a SR in an Underdamped System, which consists of a pinning potential model. The model was firstly discovered from magnetic domain wall (DW) in ferromagnetic strips. We analyze the principle of the proposed Underdamped pinning SR (UPSR) System, the detailed numerical simulation and System performance. We also propose the strategy of selecting the proper damping factor and other System parameters to match a weak signal, input noise and to generate the highest output signal-to-noise ratio (SNR). Finally, we have verified its effectiveness with both simulated and experimental input signals. Results indicate that the UPSR performs better in weak signal detection than the conventional SR (CSR) with merits of higher output SNR, better anti-noise and frequency response capability. Besides, the System can be designed accurately and efficiently owing to the sensibility of parameters and potential diversity. The features also weaken the limitation of small parameters on SR System.
Qingbo He - One of the best experts on this subject based on the ideXlab platform.
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stochastic resonance in an Underdamped System with pinning potential for weak signal detection
Sensors, 2015Co-Authors: Haibin Zhang, Qingbo He, Fanrang KongAbstract:Stochastic resonance (SR) has been proved to be an effective approach for weak sensor signal detection. This study presents a new weak signal detection method based on a SR in an Underdamped System, which consists of a pinning potential model. The model was firstly discovered from magnetic domain wall (DW) in ferromagnetic strips. We analyze the principle of the proposed Underdamped pinning SR (UPSR) System, the detailed numerical simulation and System performance. We also propose the strategy of selecting the proper damping factor and other System parameters to match a weak signal, input noise and to generate the highest output signal-to-noise ratio (SNR). Finally, we have verified its effectiveness with both simulated and experimental input signals. Results indicate that the UPSR performs better in weak signal detection than the conventional SR (CSR) with merits of higher output SNR, better anti-noise and frequency response capability. Besides, the System can be designed accurately and efficiently owing to the sensibility of parameters and potential diversity. The features also weaken the limitation of small parameters on SR System.
Jiao Xiao - One of the best experts on this subject based on the ideXlab platform.
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stochastic resonance in second order Underdamped System with exponential bistable potential for bearing fault diagnosis
IEEE Access, 2018Co-Authors: Gang Zhang, Yijun Zhang, Tianqi Zhang, Jiao XiaoAbstract:Stochastic resonance (SR) as effective approach for weak signal detection has been widely used in bearing fault signal diagnosis. In this paper, a new method was proposed to detect fault signals, which consists of an exponential bistable potential model generalized by using a harmonic Potential (HP) model, a Gaussian potential (GP) model and second-order Underdamped System. As the classical bistable SR (CBSR) has the disadvantage of output saturation, which will suppress the optimal signal-to-noise ratio (SNR) of the System, therefore, Underdamped SR with exponential potential (UESR) and Underdamped SR with classical bistable potential (UCSR) are applied to detect fault signal, respectively. Under the adiabatic condition, the analytical expression of the SNR is calculated for the UESR System driven by Gaussian white noise and periodic signal. Then, the effects of System parameters and the damping factor on analytical expression of SNR as a function of noise intensity for different parameters are studied, respectively. Finally, the proposed method is applied to detect simulated fault signals and actual bearing fault signals. The experimental results show that the proposed UESR method is superior to the UCSR method in fault signal diagnosis, such as larger output SNR and higher spectrum peaks at fault characteristic frequencies.
A R Bishop - One of the best experts on this subject based on the ideXlab platform.
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Locked-to-running transition in the two-dimensional Underdamped driven Frenkel-Kontorova model.
Physical review. E Statistical nonlinear and soft matter physics, 2001Co-Authors: Oleg M. Braun, M V Paliy, J Röder, A R BishopAbstract:We study the nonlinear dc response of a two-dimensional Underdamped System of interacting atoms subject to an isotropic periodic external potential with triangular symmetry. We consider various values of the effective elastic constant of the System, two different atomic interaction potentials, and different concentrations of atoms. In the case of a closely packed layer, when its structure is commensurate with the substrate, there is a locked-to-running transition as a function of the driving force, whose mechanism depends on the effective elastic constant. For a low elastic constant, where the layer is weakly coupled, the transition is achieved via the creation of an avalanche of moving particles that leaves a depleted region in its wake. On increasing the effective elastic constant the depleted region becomes less marked and there is a crossover to a scenario in which an island of moving particles nucleates the transition. In the case of a partially filled atomic layer, several dynamical phase transitions between states with different atomic mobility are observed. The mobility of atoms as a function of the external force can vary nonmonotonically with increasing force. For the case of a small external damping, the System can be trapped at a large force in an immobile metastable state, thus demonstrating a "fuse-safety device" on an atomic scale.
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Locked-to-running transition in the two-dimensional Underdamped driven Frenkel-Kontorova model.
Physical Review E, 2001Co-Authors: Oleg M. Braun, M V Paliy, J Röder, A R BishopAbstract:We study the nonlinear dc response of a two-dimensional Underdamped System of interacting atoms subject to an isotropic periodic external potential with triangular symmetry. We consider various values of the effective elastic constant of the System, two different atomic interaction potentials, and different concentrations of atoms. In the case of a closely packed layer, when its structure is commensurate with the substrate, there is a locked-to-running transition as a function of the driving force, whose mechanism depends on the effective elastic constant. For a low elastic constant, where the layer is weakly coupled, the transition is achieved via the creation of an avalanche of moving particles that leaves a depleted region in its wake. On increasing the effective elastic constant the depleted region becomes less marked and there is a crossover to a scenario in which an island of moving particles nucleates the transition. In the case of a partially filled atomic layer, several dynamical phase transitions between states with different atomic mobility are observed. The mobility of atoms as a function of the external force can vary nonmonotonically with increasing force. For the case of a small external damping, the System can be trapped at a large force inmore » an immobile metastable state, thus demonstrating a ''fuse-safety device'' on an atomic scale.« less
