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Inertia vibration exciter based on Halbach permanent magnet array and design method thereof

A technology of permanent magnet array and vibration exciter, applied in the direction of fluid using vibration, can solve the problem of no vibration excitation function, and achieve the effect of expanding the control frequency range, improving the magnetic circuit divergence, and avoiding deformation.

Active Publication Date: 2019-10-25
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actuator is non-contact and does not have the function of exciting vibration

Method used

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  • Inertia vibration exciter based on Halbach permanent magnet array and design method thereof
  • Inertia vibration exciter based on Halbach permanent magnet array and design method thereof
  • Inertia vibration exciter based on Halbach permanent magnet array and design method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] As introduced in the background art, the traditional vibrator is affected by installation and working methods, and has certain limitations in application fields. In order to expand the application range of the exciter, this embodiment proposes a high-force low-stiffness inertial exciter based on the Halbach permanent magnet array. Its structure is as follows figure 1 As shown, including: movable magnet part, fixed winding part, suspension part and gravity compensation part;

[0041] Wherein, the movable magnet part includes a combination of pure iron and Halbach array; refer to figure 2 and Fig. 3 (a) and Fig. 3 (b), the movable magnet part specifically includes: the second annular permanent magnet 2 is arranged on the first annular permanent magnet 3, and the first annular permanent magnet 3 and the second annular permanent magnet The first cylindrical permanent magnet 7 and the second cylindrical permanent magnet 6 are arranged between the annular space formed by 2,...

Embodiment 2

[0059] In one or more embodiments, a kind of design method of the magnetic levitation exciter based on Halbach permanent magnet array is disclosed, the method comprises the following steps:

[0060] Step 1: Use permanent magnets with different magnetization intensities, different geometric dimensions, and different shapes to form a Halbach permanent magnet array, and use finite element software to simulate the combination of different magnets;

[0061] Step 2: According to the finite element simulation results, select the optimal magnetic circuit structure;

[0062] Step 3: Calculate the magnetic field strength between the air gaps formed between the pure irons, and analyze the influence of different air gap lengths on the magnetic field strength;

[0063] Step 4: Analyze the influence of permanent magnets of different geometric sizes on the magnetic field strength at the air gap, and select the appropriate magnet size and structure based on this;

[0064] Step 5: Calculate t...

Embodiment 3

[0076] In some embodiments, a method for using an inertial exciter based on a Halbach permanent magnet array is provided, comprising the following steps:

[0077] (1) Connect the working platform 8 of the inertial vibrator to the object to be excited, and when the object to be excited is working, vibration of a certain frequency and amplitude will be generated, accompanied by noise. Use the sensor to test the vibration level of the excited object, and extract and analyze the test results through the signal acquisition and processing system.

[0078] (2) Establish a mathematical model of the excited object, and propose an active control target model for the excited object. Based on the target model, adopt modern control theory, design H∞ control algorithm or adaptive control algorithm, and establish active control model. Use controller hardware, driver hardware, etc. to control the excited object

[0079] (3) Use the AD board to convert the analog quantity into a digital quan...

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Abstract

The invention discloses an inertia vibration exciter based on a Halbach permanent magnet array and a design method thereof. The inertia vibration exciter comprises a shell, the shell is internally provided with a movable magnet part, a fixed winding part, a suspension part and a gravity compensation part, the movable magnet part comprises a Halbach permanent magnet array and pure iron positioned at the upper part and the lower part of the Halbach permanent magnet array, the fixed winding part comprises a coil, the suspension part comprises a plurality of curled springs connected between the pure iron and the shell, the gravity compensation part comprises a support spring, the fixed winding part is connected to an object to be subjected to vibration excitation, after alternating current isconnected into the coil, under the action of Lorentz force, the movable magnet part vibrates relative to the fixed winding part, and the amplitude and the frequency of vibration can be changed by adjusting the magnitude and the direction of the current. According to the inertia vibration exciter and the design method thereof, a magnetic circuit of the vibration exciter is designed by utilizing theHalbach permanent magnet array and is used for improving the magnetic induction intensity of the vibration exciter, and compared with a traditional magnetic circuit with the same volume, the magneticcircuit has the advantage that the magnetic induction intensity generated by the magnetic circuit can be improved by about 50%.

Description

technical field [0001] The invention relates to the technical field of active vibration isolation, in particular to an inertial vibrator based on a Halbach permanent magnet array and a design method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the rapid development of DSP chips, digital signal processors, high-performance sensors, etc., active control technology has been greatly improved, and it is widely used in vibration and noise suppression in aerospace, marine ships, precision equipment and other fields. For example, on a marine ship, the vibration and noise generated by propeller operation, power equipment operation, hydrodynamic force, and personnel activities in the cabin have a greater impact on the improvement of the combat effectiveness and concealment of the ship. Vibration and noise control in the middle and ...

Claims

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Application Information

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IPC IPC(8): B06B1/04
CPCB06B1/04
Inventor 武倩倩宋金明刘碧龙崔宁安峰岩
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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