Optimal design of a sensorless magnetic suspension system using a tuned LC circuit

Robert M. Krause, Alok Sinha

    Research output: Contribution to journalArticle

    Abstract

    In the existing literature, a sensorless AC magnetic suspension system which does not require direct damping of the suspended object for stability has been proposed. This is accomplished by suspending the electromagnet with a spring and damper. First, using a linearized transfer function model for the overall suspension system developed by Jin and Higuchi (1994), a study of the system's stability is presented in this paper. A root locus is then used in order to see how the damping applied to the electromagnet affects stability. Next, optimization methods and results are proposed to determine values for indirect spring stiffness and damping to most effectively stabilize the system. Lastly, results from linearized analyses are compared to those from numerical integration of the nonlinear system of differential equations.

    Original languageEnglish (US)
    Pages (from-to)113-120
    Number of pages8
    JournalAmerican Society of Mechanical Engineers, Design Engineering Division (Publication) DE
    Volume97
    StatePublished - 1998

    Fingerprint

    Electromagnets
    Damping
    Networks (circuits)
    Root loci
    System stability
    Transfer functions
    Nonlinear systems
    Differential equations
    Stiffness
    Optimal design

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering

    Cite this

    @article{2613f55713e54acca7418345b4d335d4,
    title = "Optimal design of a sensorless magnetic suspension system using a tuned LC circuit",
    abstract = "In the existing literature, a sensorless AC magnetic suspension system which does not require direct damping of the suspended object for stability has been proposed. This is accomplished by suspending the electromagnet with a spring and damper. First, using a linearized transfer function model for the overall suspension system developed by Jin and Higuchi (1994), a study of the system's stability is presented in this paper. A root locus is then used in order to see how the damping applied to the electromagnet affects stability. Next, optimization methods and results are proposed to determine values for indirect spring stiffness and damping to most effectively stabilize the system. Lastly, results from linearized analyses are compared to those from numerical integration of the nonlinear system of differential equations.",
    author = "Krause, {Robert M.} and Alok Sinha",
    year = "1998",
    language = "English (US)",
    volume = "97",
    pages = "113--120",
    journal = "American Society of Mechanical Engineers, Design Engineering Division (Publication) DE",
    issn = "1521-4613",

    }

    TY - JOUR

    T1 - Optimal design of a sensorless magnetic suspension system using a tuned LC circuit

    AU - Krause, Robert M.

    AU - Sinha, Alok

    PY - 1998

    Y1 - 1998

    N2 - In the existing literature, a sensorless AC magnetic suspension system which does not require direct damping of the suspended object for stability has been proposed. This is accomplished by suspending the electromagnet with a spring and damper. First, using a linearized transfer function model for the overall suspension system developed by Jin and Higuchi (1994), a study of the system's stability is presented in this paper. A root locus is then used in order to see how the damping applied to the electromagnet affects stability. Next, optimization methods and results are proposed to determine values for indirect spring stiffness and damping to most effectively stabilize the system. Lastly, results from linearized analyses are compared to those from numerical integration of the nonlinear system of differential equations.

    AB - In the existing literature, a sensorless AC magnetic suspension system which does not require direct damping of the suspended object for stability has been proposed. This is accomplished by suspending the electromagnet with a spring and damper. First, using a linearized transfer function model for the overall suspension system developed by Jin and Higuchi (1994), a study of the system's stability is presented in this paper. A root locus is then used in order to see how the damping applied to the electromagnet affects stability. Next, optimization methods and results are proposed to determine values for indirect spring stiffness and damping to most effectively stabilize the system. Lastly, results from linearized analyses are compared to those from numerical integration of the nonlinear system of differential equations.

    UR - http://www.scopus.com/inward/record.url?scp=11744374287&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=11744374287&partnerID=8YFLogxK

    M3 - Article

    AN - SCOPUS:11744374287

    VL - 97

    SP - 113

    EP - 120

    JO - American Society of Mechanical Engineers, Design Engineering Division (Publication) DE

    JF - American Society of Mechanical Engineers, Design Engineering Division (Publication) DE

    SN - 1521-4613

    ER -