Large-stiffness specimen test device for double-array system based on electro-hydraulic servo

A technology of electro-hydraulic servo and test piece test, which is applied in the direction of measuring device, machine/structural component test, vibration test, etc. It can solve the problems of reducing the use efficiency and damage of test piece, so as to eliminate additional internal force and avoid damage to test piece , The effect of improving the efficiency of system testing

Active Publication Date: 2021-12-21
BBK TEST SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3.1. When the stiffness of the test piece is very high, the small displacement error between the two tables will cause additional internal force of the test piece, resulting in unexpected damage to the test piece. The existing technology does not fully consider the influence of this factor
[0010] 3.3. In the prior art, one controller is generally used to control multiple vibrating tables that form a table array. When used as a single table, only one single table can be controlled for testing at the same time, and other single tables are in an idle state, which reduces the use efficiency.

Method used

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  • Large-stiffness specimen test device for double-array system based on electro-hydraulic servo
  • Large-stiffness specimen test device for double-array system based on electro-hydraulic servo
  • Large-stiffness specimen test device for double-array system based on electro-hydraulic servo

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Such as figure 2 As shown, the electro-hydraulic servo-based dual-stage array system large-stiffness specimen test device includes two three-direction six-degree-of-freedom vibration tables, and the A-table control unit used to control the movement of the first three-direction six-degree-of-freedom vibration table. A device, a B-table controller used to control the movement of the second three-way six-degree-of-freedom vibration table, the three-way six-degree-of-freedom vibration table includes a vibration table surface, an X-direction base, and is installed between the vibration table surface and the X-direction base. The X-direction actuator used to load the X-direction of the vibrating table, the Y-direction base, the Y-direction actuator installed between the vibrating table and the Y-direction base and used to load the Y-direction of the vibrating table, Z The Z-direction actuator installed between the vibrating table surface and the Z-direction base and used to ...

Embodiment 2

[0060] When two three-direction six-degree-of-freedom vibrating tables work alone, no rigid specimen is installed between the two vibrating tables, and the controllers of A and B work independently without communication.

[0061] Such as Figure 2-4 As shown, there is no connection between the two three-direction six-degree-of-freedom vibration tables, and each vibration table is controlled by its own A controller or B controller without affecting each other. Figure 4 The command signal of station A is corresponding to the three-direction six-degree-of-freedom vibration table of A station. Two three-direction six-degree-of-freedom vibration tables. Figure 4 The drive signal A, servo valve A, actuator A, table A (the table of A three-way six-degree-of-freedom vibration table), acceleration signal A, displacement signal A, and pressure signal A are all matched with A three-way six-degree-of-freedom vibration table. degrees of freedom shaker. Similarly, drive signal B, servo v...

Embodiment 3

[0067] Such as Figure 5 , 6 As shown, when two three-direction six-degree-of-freedom vibrating tables work as an array, a rigid specimen is fixed between the two vibrating tables, and the controllers of A and B communicate through real-time shared memory cards. ; The calculation information is obtained by real-time calculation of the displacement signal, pressure signal, and acceleration signal to obtain the corresponding position, thrust signal, and acceleration information of the vibrating table; the command signal of the table array is input by the A controller and synchronously output to B At the same time, the two three-direction six-degree-of-freedom vibration tables send the thrust signals of each degree of freedom to each other in real time. The additional internal forces exerted on the specimen by the two three-direction six-degree-of-freedom vibration tables are obtained after the signals are differentiated. In order to eliminate the internal force, it is processe...

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Abstract

The invention relates to a large stiffness test piece test device of a dual-stage array system based on electro-hydraulic servo, which uses independent controllers for the dual-stage three-direction six-degree-of-freedom vibration table, and uses a real-time shared memory card for communication between the controllers, thereby realizing In the single working mode, each single three-direction six-degree-of-freedom shaking table does not affect each other, and can run simultaneously to improve the efficiency of the system test. In the dual-stage array working mode, the dual-stage three-direction six-degree-of-freedom vibration table sends the thrust signals of each degree of freedom to the other party in real time, and the two controllers make a difference between the thrust signals of themselves and the other party's respective degrees of freedom to obtain two additional internal force applied to the specimen. After the controller processes and calculates the internal force, the results are superimposed on the respective output driving signals, so that the actuator pushes the surface of the vibrating table to move relative to the direction opposite to the internal force generated. Thereby eliminating the additional internal force exerted on the test piece by the double stage, avoiding damage to the test piece and instability of system control.

Description

technical field [0001] The invention relates to an electro-hydraulic servo-based double-stage array system large-rigidity specimen test device, and belongs to the technical field of electro-hydraulic servo-array system control. Background technique [0002] Shaking table test is the most realistic method to evaluate the nonlinear dynamic response of structural system, and can reproduce the earthquake process more realistically. It is mainly used to verify the correctness of the seismic design theory, method and calculation model of the structure. At present, the electro-hydraulic servo shaking table test is an important means of structural seismic research, and has been widely used. [0003] At present, the more advanced vibrating table generally has three directions and six degrees of freedom, and its typical structure is as follows: figure 1 As shown, four actuators (numbers: Z1, Z2, Z3, Z4) are installed along the vertical direction Z on the vibration table, and two actu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/06
CPCG01M7/022G01M7/025G01M7/06
Inventor 田金王展柴伟超陈明华
Owner BBK TEST SYST CO LTD
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