Disturbance force compensation method for two-degree-of-freedom electro-hydraulic vibration table

A technology of electro-hydraulic vibration and compensation method, which is applied in the direction of vibration testing, machine/structural component testing, measuring devices, etc. It can solve the problems of limited compensation effect of interference force and achieve the effect of improving control accuracy

Active Publication Date: 2021-10-01
DALIAN MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When an accurate model of the system cannot be obtained, the method described in the patent has a limited effect on compensating for disturbing forces

Method used

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  • Disturbance force compensation method for two-degree-of-freedom electro-hydraulic vibration table
  • Disturbance force compensation method for two-degree-of-freedom electro-hydraulic vibration table
  • Disturbance force compensation method for two-degree-of-freedom electro-hydraulic vibration table

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings. Such as Figure 1-3As shown, a method for compensating interference force of a two-degree-of-freedom electro-hydraulic vibration table, the two-degree-of-freedom electro-hydraulic vibration table includes two vertical valve control cylinder mechanisms, a large Hooke hinge 4, a support 3, and an upper platform 5 and lower platform 6; the two vertical valve-controlled cylinder mechanisms are No. 1 valve-controlled cylinder mechanism 1 and No. 2 valve-controlled cylinder mechanism 2; the No. 1 valve-controlled cylinder mechanism 1 and No. 2 valve-controlled cylinder mechanism The lower end of the cylinder mechanism 2 is connected to the lower platform 6 through respective ball joints, and the upper end is connected to the upper platform 5 through respective ball joints respectively, and the upper platform 5 is connected to the support 3 through a large Hooke hinge 4. The l...

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Abstract

The invention discloses a disturbance force compensation method for a two-degree-of-freedom electro-hydraulic vibration table. The disturbance force compensation method comprises the following steps that a two-degree-of-freedom acceleration reference signal is left multiplied by a matrix J and then serves as an input signal of a reference signal generator module; an output signal ra is obtained through the reference signal generator module; the ra is used as an input signal of an integrator 1 module, and an output signal rv is obtained; the rv is taken as an input signal of an integrator 2 module to obtain an output signal rx; a displacement signal x, a speed signal v and an acceleration signal a of a hydraulic cylinder piston rod of each valve control cylinder mechanism and a pressure difference signal PL of two cavities of a hydraulic cylinder are collected; the signals rx, rv, ra, x, v, a and PL serve as input signals of a disturbing force compensation controller module, and an output signal u of the disturbing force compensation controller module is calculated; and an output signal u of the disturbing force compensation controller module serves as a driving signal of the two valve-controlled cylinder mechanisms and is input into the two valve-controlled cylinder mechanisms to drive the two-degree-of-freedom electro-hydraulic vibration table to move. According to the invention, the control precision of the two-degree-of-freedom electro-hydraulic vibration table is obviously improved.

Description

technical field [0001] The invention relates to a two-degree-of-freedom electro-hydraulic vibration table, in particular to a method for compensating disturbance force of a two-degree-of-freedom electro-hydraulic vibration table Background technique [0002] The two-degree-of-freedom electro-hydraulic vibration table is the key equipment for large-scale structure or equipment vibration environment simulation. By reproducing the acceleration signal measured in the environment, the anti-vibration performance of the structure or equipment in the vibration environment is assessed. It is widely used in aerospace, bridge construction, and shipbuilding. , vehicles and other fields. The control system is the core technology of the electro-hydraulic vibration table. [0003] The two-degree-of-freedom electro-hydraulic vibration table is driven by two sets of valve-controlled cylinder mechanisms, and has two degrees of freedom of motion, roll and pitch. The controller design of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/06G01M7/02
CPCG01M7/06G01M7/022
Inventor 关广丰范大莽熊伟王海涛马文琦
Owner DALIAN MARITIME UNIVERSITY
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