Inertia exciter and its design method based on halbach permanent magnet array
A technology of permanent magnet array and vibrator, which is applied in the direction of fluid using vibration, etc., and can solve problems such as not having the function of exciting vibration
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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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