The Experts below are selected from a list of 9441 Experts worldwide ranked by ideXlab platform
Zhiyi Zhang - One of the best experts on this subject based on the ideXlab platform.
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simulation and experiment on Lateral Vibration transmission control of a shafting system with active stern support
International Journal of Mechanical Sciences, 2020Co-Authors: Xiling Xie, Mingke Ren, Yueyue Zhu, Zhiyi ZhangAbstract:Abstract An active stern support is proposed to suppress Lateral Vibration transmission in the shaft-hull system of underwater vehicles subjected to the excitation of propeller forces. The active stern support uses six active struts instead of a common bearing support to suppress Vibration transmission from the shaft to the hull. The dynamic model of a shaft-hull system embedded with the active stern support is established on the Timoshenko beam theory and the FRF (frequency response function)-based synthesis method. Based on this model, the characteristics of Vibration transmission in the system and the feasibility of active control are analyzed. An adaptive control algorithm is constructed and the performance of Vibration suppression is evaluated. An experimental system is built as well to verify the effectiveness of the control method. Numerical and experimental results show that the active stern support is able to suppress the transmission of Lateral Vibration induced by the propeller forces, and the attenuation of the normal Vibration of the hull structure can be achieved.
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Lateral Vibration transmission suppression of a shaft hull system with active stern support
Ocean Engineering, 2019Co-Authors: Xiling Xie, Hui Qin, Zhiyi ZhangAbstract:Abstract This paper presents an active control method for reducing the Lateral Vibration transmission in a shaft-hull coupled system of submerged vehicles under the excitation of propeller forces. In this method, a 6-DOF (degree of freedom) active stern support and the local velocity feedback control strategy are employed to suppress Vibration transmission from the shaft to the hull. The dynamic model of the shaft-hull system embedded with the active stern support is established with the FRF (frequency response function)-based synthesis method and the FEM/BEM (finite element method/boundary element method). The six-channel local velocity feedback control strategy is employed to suppress Vibrations of the strut-hull interface. Numerical results indicate that a noticeable attenuation of Vibration and sound radiation can be achieved by the active stern support. In addition, the combination control at the stern support and the thrust bearing is able to obtain better attenuation at some critical frequencies. Suppression of the mean square velocity and radiated sound power of the hull surface are observed.
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Lateral Vibration control of a shafting-hull coupled system with electromagnetic bearings:
Journal of Low Frequency Noise Vibration and Active Control, 2018Co-Authors: Hui Qin, Hongbo Zheng, Wenyuan Qin, Zhiyi ZhangAbstract:In order to suppress Lateral Vibration transmission and reduce acoustic radiation of a shafting-hull coupled system, a new approach using electromagnetic bearings in the shafting system is proposed...
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Active Control of the Longitudinal-Lateral Vibration of a Shaft-Plate Coupled System
Journal of Vibration and Acoustics, 2012Co-Authors: Zhiyi Zhang, Emiliano Rustighi, Yong Chen, Hongxing HuaAbstract:The coupled longitudinal-Lateral Vibration of a shaft-plate system and its suppression by means of a feedback control scheme are discussed. A simplified model of the system is established through synthesis of frequency response functions (FRFs) and verified with the finite element method (FEM). This analytical model describes the coupled longitudinal-Lateral Vibration of the system induced by longitudinal periodic excitation at the free end of the shaft. Based on this model, Vibration control via longitudinal actuation on the shaft and active Vibration cancellation are studied. The active control scheme is based on an adaptive feedback scenario and a novel mechanism of adaptation of the controller’s gain, which is proposed for time-varying dynamics induced by the variation of the axial spring stiffness. Simulation results have demonstrated that the control scheme is effective in attenuating Vibration of the system. Furthermore, axial actuation on the shaft is able to cancel the effect of the longitudinal disturbance acting at the free end of the shaft and consequently reduces the internal forces as well as the Vibration in the plate. However, deviation of the actuation force from the shaft axis will deteriorate control of the Lateral Vibration and sufficiently small deviation needs to be guaranteed
Xianwu Yang - One of the best experts on this subject based on the ideXlab platform.
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characteristics analysis of Lateral Vibration of tire tread
Journal of Vibration and Control, 2011Co-Authors: Shuguang Zuo, Lei Lei, Xianwu YangAbstract:Starting from the analysis of tire ground contact characteristics, the formulas of ground contact patch of tires are obtained, which are verified by tests, and the calculation formula of Lateral stiffness of tread element is determined using the energy method. On this basis, a dynamic model of tread's Lateral Vibration is established, and the effects of vehicle speed, vertical load and tire pressure are analyzed. The results show that: the Lateral self-excited Vibration will occur under certain conditions, and vehicle speed, vertical load and tire pressure have great influence on the Vibration characteristics; the Lateral self-excited Vibration of tread is a kind of stable periodic Vibration caused by Hopf bifurcation of system.
Xiling Xie - One of the best experts on this subject based on the ideXlab platform.
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simulation and experiment on Lateral Vibration transmission control of a shafting system with active stern support
International Journal of Mechanical Sciences, 2020Co-Authors: Xiling Xie, Mingke Ren, Yueyue Zhu, Zhiyi ZhangAbstract:Abstract An active stern support is proposed to suppress Lateral Vibration transmission in the shaft-hull system of underwater vehicles subjected to the excitation of propeller forces. The active stern support uses six active struts instead of a common bearing support to suppress Vibration transmission from the shaft to the hull. The dynamic model of a shaft-hull system embedded with the active stern support is established on the Timoshenko beam theory and the FRF (frequency response function)-based synthesis method. Based on this model, the characteristics of Vibration transmission in the system and the feasibility of active control are analyzed. An adaptive control algorithm is constructed and the performance of Vibration suppression is evaluated. An experimental system is built as well to verify the effectiveness of the control method. Numerical and experimental results show that the active stern support is able to suppress the transmission of Lateral Vibration induced by the propeller forces, and the attenuation of the normal Vibration of the hull structure can be achieved.
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Lateral Vibration transmission suppression of a shaft hull system with active stern support
Ocean Engineering, 2019Co-Authors: Xiling Xie, Hui Qin, Zhiyi ZhangAbstract:Abstract This paper presents an active control method for reducing the Lateral Vibration transmission in a shaft-hull coupled system of submerged vehicles under the excitation of propeller forces. In this method, a 6-DOF (degree of freedom) active stern support and the local velocity feedback control strategy are employed to suppress Vibration transmission from the shaft to the hull. The dynamic model of the shaft-hull system embedded with the active stern support is established with the FRF (frequency response function)-based synthesis method and the FEM/BEM (finite element method/boundary element method). The six-channel local velocity feedback control strategy is employed to suppress Vibrations of the strut-hull interface. Numerical results indicate that a noticeable attenuation of Vibration and sound radiation can be achieved by the active stern support. In addition, the combination control at the stern support and the thrust bearing is able to obtain better attenuation at some critical frequencies. Suppression of the mean square velocity and radiated sound power of the hull surface are observed.
Shuguang Zuo - One of the best experts on this subject based on the ideXlab platform.
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Electromechanical coupling dynamic modeling and analysis of vertical electrodynamic shaker considering low frequency Lateral Vibration
Advances in Mechanical Engineering, 2020Co-Authors: Shuguang Zuo, Zhaoyang Feng, Jian PanAbstract:For the problem of relatively severe Lateral Vibration found in the vertical electrodynamic shaker experiment, an electromechanical coupling dynamic model of the electrodynamic shaker considering low-frequency Lateral Vibration is proposed. The reason and mechanism of the Lateral Vibration is explained and analyzed through this model. To establish this model, an electromagnetic force model of overall conditions is firstly built by fitting force samples with neural network method. The force samples are obtained by orthogonal test of finite element simulation, in which five factors of the moving coil including current, vertical position, flipping eccentricity angle, radial translational eccentric direction and distance are considered. Secondly, a 7-dof dynamic model of the electrodynamic shaker is developed with the consideration of the Lateral Vibration of the moving system. To obtain the transfer function accurately, the stiffness and damping parameters are identified. Finally, an electromechanical dynamic model is established by coupling the force model and the 7-dof dynamic model, and it is verified by experiments. The coupling model proposed can be further used for the control and optimization of the electrodynamic shaker.
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characteristics analysis of Lateral Vibration of tire tread
Journal of Vibration and Control, 2011Co-Authors: Shuguang Zuo, Lei Lei, Xianwu YangAbstract:Starting from the analysis of tire ground contact characteristics, the formulas of ground contact patch of tires are obtained, which are verified by tests, and the calculation formula of Lateral stiffness of tread element is determined using the energy method. On this basis, a dynamic model of tread's Lateral Vibration is established, and the effects of vehicle speed, vertical load and tire pressure are analyzed. The results show that: the Lateral self-excited Vibration will occur under certain conditions, and vehicle speed, vertical load and tire pressure have great influence on the Vibration characteristics; the Lateral self-excited Vibration of tread is a kind of stable periodic Vibration caused by Hopf bifurcation of system.
D.f. Cui - One of the best experts on this subject based on the ideXlab platform.
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Primary resonance of Lateral Vibration of a heated beam with an axial stick–slip–stop boundary
Journal of Sound and Vibration, 2015Co-Authors: D.f. CuiAbstract:Abstract As a first endeavor, the present work deals with the primary resonance of Lateral Vibration of an Euler–Bernoulli beam with a sliding end and under both uniformly distributed heating and harmonic loads. The sliding end is subject to a pair of adjustable normal force and frictional force such that it is initially at a stick status, but may be slightly slipping due to the thermal expansion of the beam until it contacts a stop, i.e., the bound of the clearance. Moreover, this sliding end may also be slipping during the Lateral Vibration when the Vibration amplitude is larger than a critical value. Firstly, based on the nonlinear relation between strain and displacement, a set of partial differential equations of the beam and the axial boundary condition for the sliding end are derived by utilizing Hamilton׳s principle, where both frictional force and temperature-dependent properties of material are taken into consideration. Then, Galerkin׳s approach is employed to simplify the partial differential equations to a set of ordinary differential equations. Subsequently, the average approach is used to determine the steady-state primary resonance. Finally, the analytical solutions are well verified through numerical simulations and the influences of system parameters, such as temperature rise and normal force, on the primary resonance of Lateral Vibration of the beam are discussed. The study shows that it is possible to adjust the primary resonance of Lateral Vibration of the heated beam with an axial stick–slip–stop boundary via the analytical solutions, which involve the normal force, the clearance and the temperature rise.
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primary resonance of Lateral Vibration of a heated beam with an axial stick slip stop boundary
Journal of Sound and Vibration, 2015Co-Authors: D.f. CuiAbstract:Abstract As a first endeavor, the present work deals with the primary resonance of Lateral Vibration of an Euler–Bernoulli beam with a sliding end and under both uniformly distributed heating and harmonic loads. The sliding end is subject to a pair of adjustable normal force and frictional force such that it is initially at a stick status, but may be slightly slipping due to the thermal expansion of the beam until it contacts a stop, i.e., the bound of the clearance. Moreover, this sliding end may also be slipping during the Lateral Vibration when the Vibration amplitude is larger than a critical value. Firstly, based on the nonlinear relation between strain and displacement, a set of partial differential equations of the beam and the axial boundary condition for the sliding end are derived by utilizing Hamilton׳s principle, where both frictional force and temperature-dependent properties of material are taken into consideration. Then, Galerkin׳s approach is employed to simplify the partial differential equations to a set of ordinary differential equations. Subsequently, the average approach is used to determine the steady-state primary resonance. Finally, the analytical solutions are well verified through numerical simulations and the influences of system parameters, such as temperature rise and normal force, on the primary resonance of Lateral Vibration of the beam are discussed. The study shows that it is possible to adjust the primary resonance of Lateral Vibration of the heated beam with an axial stick–slip–stop boundary via the analytical solutions, which involve the normal force, the clearance and the temperature rise.
