The Experts below are selected from a list of 2640 Experts worldwide ranked by ideXlab platform

Yongchao Wang - One of the best experts on this subject based on the ideXlab platform.

  • Research on Equivalent Material Properties and Modal Analysis Method of Stator System of Permanent Magnet Motor With Concentrated Winding
    IEEE Access, 2019
    Co-Authors: Xueyi Zhang, Cansong Gu, Yongchao Wang
    Abstract:

    Establishing an accurate stator system Modal Analysis model is of great significance for the vibration and noise Analysis of the motor, scholars still have some controversy about how to set the material properties of the stator core and winding in Modal Analysis. First, the equivalent models of the stator core and winding was analyzed, the initial value of equivalent material parameters was determined. Second, the finite element models were used to analyze the influence of the equivalent material parameters on the natural frequency, a correction Method of equivalent material parameters was proposed. Third, the Modal of the stator core and the stator core with winding were tested by the moving force Method. The finite element Analysis results are consistent with the Modal test results. Some influence laws of equivalent material parameters on natural frequency are obtained. The proposed correction Method of equivalent material parameters helps to quickly determine the equivalent material properties of the stator core and windings. Setting the properties of the stator core and the winding material to the orthotropic materials can ensure the accuracy of the Modal Analysis.

Yaobin Chen - One of the best experts on this subject based on the ideXlab platform.

  • Closed-loop stability Analysis of a flexible robot arm using feedback control
    Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207), 1998
    Co-Authors: Rongjun Zhang, Yaobin Chen
    Abstract:

    Presents a strategy for stability Analysis of a feedback controlled flexible arm without truncation. The unconstrained Modal Analysis Method is used to derive a set of infinite dimensional ordinary differential equations (ODEs) with rigidity-flexibility decoupled. Based on this set of ODEs, matrix factorization and its relevant techniques are employed to analyze the closed-loop stability of the system under feedback control. Several common feedback controlled systems were studied. Validation through comparative and experimental studies is presented.

R. Luebbers - One of the best experts on this subject based on the ideXlab platform.

  • Effects of waveguide wall grooves used to hold samples for measurement of permittivity and permeability
    IEEE Transactions on Microwave Theory and Techniques, 1993
    Co-Authors: R. Luebbers
    Abstract:

    The complex permittivity and permeability of a material may be measured at microwave frequencies by placing a sample of the material in a waveguide and measuring the complex reflection and transmission coefficients. Whereas there are various approaches to holding the sample in place, for a thin rigid sample shallow grooves may be cut in the waveguide walls for this purpose. However, such grooves will be a source of error since higher order modes can be excited. In this paper the Modal Analysis Method is used to illustrate the potential for error in measuring constitutive parameters of the sample introduced by the grooves.

Xueyi Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Research on Equivalent Material Properties and Modal Analysis Method of Stator System of Permanent Magnet Motor With Concentrated Winding
    IEEE Access, 2019
    Co-Authors: Xueyi Zhang, Cansong Gu, Yongchao Wang
    Abstract:

    Establishing an accurate stator system Modal Analysis model is of great significance for the vibration and noise Analysis of the motor, scholars still have some controversy about how to set the material properties of the stator core and winding in Modal Analysis. First, the equivalent models of the stator core and winding was analyzed, the initial value of equivalent material parameters was determined. Second, the finite element models were used to analyze the influence of the equivalent material parameters on the natural frequency, a correction Method of equivalent material parameters was proposed. Third, the Modal of the stator core and the stator core with winding were tested by the moving force Method. The finite element Analysis results are consistent with the Modal test results. Some influence laws of equivalent material parameters on natural frequency are obtained. The proposed correction Method of equivalent material parameters helps to quickly determine the equivalent material properties of the stator core and windings. Setting the properties of the stator core and the winding material to the orthotropic materials can ensure the accuracy of the Modal Analysis.

Rongjun Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Closed-loop stability Analysis of a flexible robot arm using feedback control
    Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207), 1998
    Co-Authors: Rongjun Zhang, Yaobin Chen
    Abstract:

    Presents a strategy for stability Analysis of a feedback controlled flexible arm without truncation. The unconstrained Modal Analysis Method is used to derive a set of infinite dimensional ordinary differential equations (ODEs) with rigidity-flexibility decoupled. Based on this set of ODEs, matrix factorization and its relevant techniques are employed to analyze the closed-loop stability of the system under feedback control. Several common feedback controlled systems were studied. Validation through comparative and experimental studies is presented.