The Experts below are selected from a list of 8148 Experts worldwide ranked by ideXlab platform

Noboru Morita - One of the best experts on this subject based on the ideXlab platform.

  • study on online analysis of transfer function of variable Speed rolling mill motor with shaft torsional vibration systems
    Ieej Transactions on Industry Applications, 2011
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Masanori Kimoto, Noboru Morita, Takeo Hoshino, Kenji Hashizume
    Abstract:

    The torsional vibration between metal rolling rolls and a rolling mill motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in “G” (Relative acceleration value on the basis of Gravity) can be plotted on “Bode-Diagram”, which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. As the amplitude of the white noise decreases, the analysis error increases because of the reduction in the resolution when the amplitude of the white noise Signal is small.

  • a study for on line transfer function analysis in realizing higher Speed response adjustment in association with variable Speed rolling mill motor drive system
    The International Power Electronics Conference - ECCE ASIA, 2010
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Siming Xiao, Masanori Kimoto, Noboru Morita
    Abstract:

    Torsional Vibration between Metal Rolling Rolls and a Rolling Mill Motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Therefore online transfer function analysis, in which white noise Signal is superposed to Speed Reference Signal in between real rolling operation, is applied to the variable Speed rolling mill motor drive system, in order to realize both higher response adjustment and avoiding the motor shaft torsional resonance, at the same time. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in "G" (Relative acceleration value on the basis of Gravity) can be plotted on "Bode-Diagram", which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. The smaller the white noise amplitude be, the larger the analysis error will be, due to resolution reduction by the smaller white noise Signal amplitude.

Toshifumi Tamaoki - One of the best experts on this subject based on the ideXlab platform.

  • study on online analysis of transfer function of variable Speed rolling mill motor with shaft torsional vibration systems
    Ieej Transactions on Industry Applications, 2011
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Masanori Kimoto, Noboru Morita, Takeo Hoshino, Kenji Hashizume
    Abstract:

    The torsional vibration between metal rolling rolls and a rolling mill motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in “G” (Relative acceleration value on the basis of Gravity) can be plotted on “Bode-Diagram”, which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. As the amplitude of the white noise decreases, the analysis error increases because of the reduction in the resolution when the amplitude of the white noise Signal is small.

  • a study for on line transfer function analysis in realizing higher Speed response adjustment in association with variable Speed rolling mill motor drive system
    The International Power Electronics Conference - ECCE ASIA, 2010
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Siming Xiao, Masanori Kimoto, Noboru Morita
    Abstract:

    Torsional Vibration between Metal Rolling Rolls and a Rolling Mill Motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Therefore online transfer function analysis, in which white noise Signal is superposed to Speed Reference Signal in between real rolling operation, is applied to the variable Speed rolling mill motor drive system, in order to realize both higher response adjustment and avoiding the motor shaft torsional resonance, at the same time. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in "G" (Relative acceleration value on the basis of Gravity) can be plotted on "Bode-Diagram", which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. The smaller the white noise amplitude be, the larger the analysis error will be, due to resolution reduction by the smaller white noise Signal amplitude.

German Castellanosdominguez - One of the best experts on this subject based on the ideXlab platform.

  • nonlinear model for condition monitoring of non stationary vibration Signals in ship driveline application
    Mechanical Systems and Signal Processing, 2014
    Co-Authors: O Cardonamorales, L D Avendano, German Castellanosdominguez
    Abstract:

    Abstract Condition monitoring of mechanical systems is an important topic for industry since it improves machine maintenance and reduce the total associated operational cost. In this sense, vibration analysis is a useful tool for failure prevention in rotating machines, and its main challenge is to perform on-line estimation of dynamic behavior, due to non-stationary operating conditions. To this, estimation of both, amplitude and instantaneous frequency, holding most of process information should be carried out. Nevertheless, approaches for estimating those parameters require to have the shaft Speed Reference Signal, which is not always provided in several industrial applications. In this paper, a novel Order Tracking (OT) scheme of estimation is proposed that is based on the state space model that avoids the shaft Speed Reference Signal. The nonlinear oscillatory model designed as frequency tracker is adapted for estimating the phase and the amplitude of each particular harmonic component. Specifically, nonlinear filtering (namely, the Square-Root Cubature Kalman Filter) is used to estimate the spectral components from the vibration Signal. The proposed approach is tested and compared with baseline Vold–Kalman Filtering over four different datasets. The obtained results show that proposed approach is robust and it performs with high accuracy estimation of the order component and the instantaneous frequency under different operating conditions; both allow capturing machine dynamic behavior.

Makoto Takanezawa - One of the best experts on this subject based on the ideXlab platform.

  • study on online analysis of transfer function of variable Speed rolling mill motor with shaft torsional vibration systems
    Ieej Transactions on Industry Applications, 2011
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Masanori Kimoto, Noboru Morita, Takeo Hoshino, Kenji Hashizume
    Abstract:

    The torsional vibration between metal rolling rolls and a rolling mill motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in “G” (Relative acceleration value on the basis of Gravity) can be plotted on “Bode-Diagram”, which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. As the amplitude of the white noise decreases, the analysis error increases because of the reduction in the resolution when the amplitude of the white noise Signal is small.

  • a study for on line transfer function analysis in realizing higher Speed response adjustment in association with variable Speed rolling mill motor drive system
    The International Power Electronics Conference - ECCE ASIA, 2010
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Siming Xiao, Masanori Kimoto, Noboru Morita
    Abstract:

    Torsional Vibration between Metal Rolling Rolls and a Rolling Mill Motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Therefore online transfer function analysis, in which white noise Signal is superposed to Speed Reference Signal in between real rolling operation, is applied to the variable Speed rolling mill motor drive system, in order to realize both higher response adjustment and avoiding the motor shaft torsional resonance, at the same time. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in "G" (Relative acceleration value on the basis of Gravity) can be plotted on "Bode-Diagram", which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. The smaller the white noise amplitude be, the larger the analysis error will be, due to resolution reduction by the smaller white noise Signal amplitude.

Masanori Kimoto - One of the best experts on this subject based on the ideXlab platform.

  • study on online analysis of transfer function of variable Speed rolling mill motor with shaft torsional vibration systems
    Ieej Transactions on Industry Applications, 2011
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Masanori Kimoto, Noboru Morita, Takeo Hoshino, Kenji Hashizume
    Abstract:

    The torsional vibration between metal rolling rolls and a rolling mill motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in “G” (Relative acceleration value on the basis of Gravity) can be plotted on “Bode-Diagram”, which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. As the amplitude of the white noise decreases, the analysis error increases because of the reduction in the resolution when the amplitude of the white noise Signal is small.

  • a study for on line transfer function analysis in realizing higher Speed response adjustment in association with variable Speed rolling mill motor drive system
    The International Power Electronics Conference - ECCE ASIA, 2010
    Co-Authors: Toshifumi Tamaoki, Makoto Takanezawa, Siming Xiao, Masanori Kimoto, Noboru Morita
    Abstract:

    Torsional Vibration between Metal Rolling Rolls and a Rolling Mill Motor, may occur in recent days, as a result of higher Speed response adjustment for variable Speed rolling mill motor drive system. Therefore online transfer function analysis, in which white noise Signal is superposed to Speed Reference Signal in between real rolling operation, is applied to the variable Speed rolling mill motor drive system, in order to realize both higher response adjustment and avoiding the motor shaft torsional resonance, at the same time. Issues in this paper are focused on excess acceleration value, in tangential direction of the mill motor rotor, which is caused by the motor shaft torsional resonance at the white noise Signal superposition to the Speed Reference Signal of the motor drive system for the online transfer function analysis. As a result of the acceleration analysis, the acceleration values in "G" (Relative acceleration value on the basis of Gravity) can be plotted on "Bode-Diagram", which is namely frequency response for the Speed Signal amplitude transmission ratio. In addition, relation between the white noise amplitude reduction and the transfer function analysis accuracy deterioration is also examined, in this paper. The smaller the white noise amplitude be, the larger the analysis error will be, due to resolution reduction by the smaller white noise Signal amplitude.