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Low-frequency standard vibration table based on full state feedback

A vibrating table, full-state technology, applied in the testing/calibration of speed/acceleration/shock measuring equipment, measuring devices, instruments, etc., can solve the problems of large distortion and displacement, and achieve strong harmonic suppression ability, good effect, The effect of convenient parameter setting

Active Publication Date: 2019-09-10
嘉兴亿恒测试技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the acceleration waveform distortion is much larger than the displacement in the prior art, and to provide a low-frequency standard vibration table based on full state feedback that can suppress the nonlinear waveform distortion in the low-frequency band

Method used

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  • Low-frequency standard vibration table based on full state feedback
  • Low-frequency standard vibration table based on full state feedback
  • Low-frequency standard vibration table based on full state feedback

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 The illustrated embodiment is a low-frequency standard vibration table based on full state feedback, including a low-frequency standard vibration table 1, a grating displacement sensor 2, a current sensor 3, a power amplifier 4, and a controller 5; the controller output channel sends a voltage drive signal u, after being amplified by the power amplifier, it is added to both ends of the driving coil 6 of the low-frequency standard vibrating table. At the bottom, the current sensor measures the current flowing into the driving coil of the vibrating table, and the displacement signal s and current signal i are connected to the input channel of the controller for collection.

[0032] Firstly, the state-space model of the low-frequency standard shaking table is established:

[0033]

[0034]

[0035] in, is the time...

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PUM

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Abstract

The invention discloses a low-frequency standard vibration table based on full state feedback. The low-frequency standard vibration table based on the full state feedback comprises a low-frequency standard vibration table, a grating displacement sensor, a current sensor, a power amplifier and a controller; the output channel of the controller sends a voltage driving signal, which is amplified by the power amplifier and added to the two ends of a driving coil of the low-frequency standard vibration table; the energized driving coil bears an ampere force under the action of a magnetic field anddrives the moving parts of the vibration table to generate vibration; and the grating displacement sensor is mounted on the bottom of the moving parts of the low-frequency standard vibration table. The low-frequency standard vibration table based on the full state feedback has the characteristics that the convergence process of state variables is adjustable and the suppression effect of low-frequency harmonic distortion is better.

Description

technical field [0001] The invention relates to the technical field of low-frequency standard vibrating table control, in particular to a low-frequency standard vibrating table based on full state feedback that can suppress nonlinear waveform distortion in low-frequency bands. Background technique [0002] The low-frequency standard vibration table is used to calibrate the low-frequency acceleration sensor, and the control goal of the low-frequency standard vibration table is to generate high-precision sinusoidal vibration excitation. However, due to the influence of factors such as the nonlinear stiffness of the spring and the uneven magnetic field, the waveform distortion of the low-frequency standard shaking table is often large in the low-frequency range, which has a serious impact on the calibration accuracy of the acceleration sensor. The existing low-frequency station control technologies mainly include displacement feedback, velocity feedback, and PID control. The ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/00
CPCG01P21/00
Inventor 贺惠农李潮
Owner 嘉兴亿恒测试技术有限公司
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