Method for deciding radial rotation stability of magnetic suspension rotor system

A magnetic levitation rotor, radial rotation technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve the problem of not having the intuitiveness and robustness of classical control theory, inconvenient for practical applications, and not suitable for strong gyro coupling Effects of magnetic levitation rotor system, etc.

Inactive Publication Date: 2006-10-25
BEIHANG UNIV
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Problems solved by technology

However, the state-space method relies too much on the system model and mathematical analysis, does not have the intuitiveness and robustness of classical control theory, and is not convenient for practical application
For the maglev rotor system with ...

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  • Method for deciding radial rotation stability of magnetic suspension rotor system
  • Method for deciding radial rotation stability of magnetic suspension rotor system
  • Method for deciding radial rotation stability of magnetic suspension rotor system

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Embodiment Construction

[0043] The content of the present invention is introduced in conjunction with a magnetic suspension high-speed rotor system used in a magnetic suspension control moment gyroscope.

[0044] The flow chart of stability determination is as follows: figure 1 As shown, the differential equation model of the radial rotation motion dynamics of the maglev rotor system is established first, and the real coefficient two-variable equation is transformed into the complex coefficient single-variable form by complex number transformation, and the complex coefficient single-variable equivalent system is obtained, and then the equivalent complex coefficient is drawn. The dual-frequency Bode diagram of the open-loop transfer function of the coefficient system uses the stability criterion in the frequency domain to determine the stability of the radial rotation motion. If it is stable, the precession and nutation of the rotor are both stable. Nutation is unstable.

[0045] Maglev rotor system ...

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Abstract

A method for judging magnetic suspension rotor system stability, includes through establishing magnetic suspension rotor system radial rotational motion dynamics differential equation model, adopting plurality conversion converting real coefficient two variable equation to complex system monovariant form, to obtain monovariant equivalent system, then drawing open loop transfer function dual frequency Bode chart of equifinality complex system, utilizing generalized classic frequency field stability criteria judging rotor precession and nutation stability, providing require condition for designing raising system stability correction link. The present invention converts multivariable system to equifinality monovariant system, thereby capable of using classical monovariant control theory to proceed stability analysis, relative usual multivariable method such as state space analysis method etc, not only very visual but also having good robustness, thus more fitting real system application.

Description

technical field [0001] The invention relates to a method for judging the stability of a magnetic suspension rotor system, which can be used for the stability analysis of the radial rotation mode of the magnetic suspension rotor system, and to judge whether the precession and nutation of the magnetic suspension rotor are stable. Background technique [0002] Compared with traditional mechanical ball bearings, magnetic bearings have outstanding advantages such as non-contact, active controllability of stiffness and damping, so there is no friction and wear, and no lubrication is required, allowing the rotor to rotate at high speed, with small vibration and high support accuracy, especially suitable for ultra- Clean environment equipment, high speed equipment and aerospace equipment requiring low vibration, high precision and long life. At present, the magnetic levitation rotor system based on magnetic bearings has been increasingly widely used in spacecraft attitude control ac...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/00
Inventor 房建成魏彤陈冬王鹏张峰
Owner BEIHANG UNIV
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