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Method for controlling structural modal vibration of dual-frame magnetic levitation control moment gyroscope

A technology for controlling moment gyro and structural mode, applied in the field of aerospace control

Inactive Publication Date: 2010-06-30
BEIHANG UNIV
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Problems solved by technology

[0005] The technical solution of the present invention: In order to overcome the deficiency of the prior art in solving the modal vibration of the double-frame magnetically suspended CMG structure, a method for controlling the modal vibration of the double-frame magnetically suspended CMG structure is proposed, which effectively suppresses the modal vibration caused by the complex frame structure. Structural Modal Vibration of Rotor System

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  • Method for controlling structural modal vibration of dual-frame magnetic levitation control moment gyroscope
  • Method for controlling structural modal vibration of dual-frame magnetic levitation control moment gyroscope
  • Method for controlling structural modal vibration of dual-frame magnetic levitation control moment gyroscope

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[0037] specific implementation plan

[0038] The double-frame magnetic levitation control moment gyro magnetic bearing control system is composed of a magnetic bearing controller, a power amplifier, an electromagnet rotor, and a displacement sensor. The displacement sensor detects the displacement of the electromagnet rotor from the reference point, and the controller calculates the control signal according to the deviation, and then The power amplifier converts the control signal into a control current, drives the electromagnet to generate electromagnetic force, and makes the electromagnet rotor suspend at a given position. The double-frame magnetic levitation CMG rotor achieves suspension control through five-degree-of-freedom magnetic bearings. The four radial channels ax, ay, bx, and by provide two radial translational and two rotational degrees of freedom, and the axial channel provides one translational degree of freedom. The rotational degree of freedom is driven by a m...

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Abstract

The invention relates to a method for controlling the structural modal vibration of a dual-frame magnetic levitation control moment gyroscope (CMG). On the basis of establishing a nominal model of an electromagnet rotor system, a sine-swept excitation mode is adopted to perform the identification of frequency domains on an electromagnet rotor and measure the disturbance of system parameters, the properties of structural vibration modality and the high-frequency unmodeled dynamics of an electromagnet rotor model; and a comprehensive robust control method of a structural singular value mu is utilized to select a weighting function and inhibit the structural modal vibration. The method belongs to the technical field of aerospace control, and can be used for inhibiting the structural modal vibration of the dual-frame magnetic levitation CMG.

Description

technical field [0001] The invention relates to a method for controlling the structural mode vibration of a double-frame magnetic suspension control moment gyroscope (Control Moment Gyroscope-CMG), which belongs to the technical field of aerospace control and can be used for suppressing the structural mode vibration of a double-frame magnetic suspension CMG. Background technique [0002] Control moment gyroscope (CMG) is an important actuator for attitude control of large spacecraft. According to the degree of freedom of the frame, CMG is divided into single-frame CMG and double-frame CMG, and according to the supporting method of the rotor, it can be divided into mechanical support and magnetic suspension support. Because the double-frame CMG can effectively reduce the volume and weight of the attitude control system, improve the redundancy of the system, and the high-speed rotor and the support bearing have the advantages of no contact and no friction, so the double-frame ...

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Application Information

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IPC IPC(8): G05B13/04
Inventor 房建成郑世强王英广谢进进马纪军
Owner BEIHANG UNIV
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