High-precision modeling method for Lorentz force of large-gap electromagnetic actuator

An electromagnetic actuator and Lorentz force high technology, applied in the field of high-precision modeling of Lorentz force for large-gap electromagnetic actuators

Active Publication Date: 2017-02-22
TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision modeling method of the Lorentz force of a large-gap electromagnetic actuator, thereby solving the aforementioned problems in the prior art

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  • High-precision modeling method for Lorentz force of large-gap electromagnetic actuator
  • High-precision modeling method for Lorentz force of large-gap electromagnetic actuator
  • High-precision modeling method for Lorentz force of large-gap electromagnetic actuator

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specific Embodiment

[0090] The specific steps of the high-precision Lorentz force modeling method for a large-gap electromagnetic actuator provided by the embodiment of the present invention are as follows:

[0091] Step 1: Define the electromagnetic actuator coordinate system, referred to as department, such as figure 2 shown. The coordinate origin O is the midpoint of the line connecting the centers of the N and S poles of the permanent magnet, the X-axis is the line connecting the centers of the N and S poles of the permanent magnet and points from the N pole to the S pole, the Z axis points to the positive direction of the current, and the Y axis is vertical On the X-axis and Z-axis, a right-handed coordinate system is formed.

[0092] The magnetic field distribution of the large-gap electromagnetic actuator is uneven, and the equivalent magnetic field strength of the electromagnetic actuator is tested and calibrated by the static thrust measurement experiment method. When the permanent ...

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Abstract

The invention discloses a high-precision modeling method for a Lorentz force of a large-gap electromagnetic actuator, and relates to the technical field of magnetic levitation control. The method is suitable for the electromagnetic actuator with the gap of more than 10mm. The method comprises the following steps of statically calibrating a test system through the electromagnetic actuator, and performing measurement to obtain equivalent magnetic field intensities of different positions; calculating a coefficient of a polynomial model by adopting a least square method based on the polynomial model, about position variables, of data and the equivalent magnetic field intensities obtained by measurement, and building the polynomial model of the equivalent magnetic field intensities; building an output force model of the electromagnetic actuator according to a Lorentz force principle; and calculating an equivalent resultant force action point position of the electromagnetic actuator by adopting a geometric method, and building an output moment model of the electromagnetic actuator based on the equivalent resultant force action point position and the output force model of the electromagnetic actuator. According to the method, high-precision control force and control moment output requirements of a space microgravity active vibration isolation control system can be met.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension control, in particular to a high-precision Lorentz force modeling method for a large-gap electromagnetic actuator. Background technique [0002] The space active vibration isolation device can effectively isolate various disturbances on the spacecraft and provide the required microgravity level for scientific experiment loads. Large-gap electromagnetic actuators are usually selected as actuators for spatial active vibration isolation devices because of their non-mechanical contact characteristics, reduced disturbance transmission paths, and high-precision Lorentz force output capabilities. The working principle of the electromagnetic actuator is that the permanent magnet (or electromagnet) generates a stable magnetic field, and the current-carrying wire is subjected to the Lorentz force in the magnetic field. By changing the size and direction of the current in the energized wire, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘伟高扬李宗峰董文博
Owner TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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