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Real-time hybrid test method based on actuator and vibration table

A hybrid test and shaking table technology, which is applied in the field of civil engineering, can solve problems such as the lack of effective and reliable solutions, the difficulty of ensuring high-precision reproduction of boundary conditions, and the difficulty of ensuring stable force control accuracy, so as to achieve the best displacement goals , Simplify the difficulty of dynamic force control and reduce the effect of test difficulty

Active Publication Date: 2020-08-07
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, due to the difficulty of force control, the accuracy of force control is difficult to guarantee stably, which makes it difficult to ensure the high-precision reproduction of boundary conditions. So far, no effective and reliable solution has been obtained.

Method used

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  • Real-time hybrid test method based on actuator and vibration table
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  • Real-time hybrid test method based on actuator and vibration table

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specific Embodiment approach 1

[0057] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 To illustrate this embodiment, the real-time mixed test method described in this embodiment is to establish the numerical substructure dynamic equation and the experimental substructure dynamic equation respectively after the numerical substructure and experimental substructure of the structural model are divided, and logarithmically The numerical calculation of the structural dynamics equation is carried out using the numerical integration algorithm, and the loading of the test substructure is carried out by the loading equipment, so that the calculation results of the numerical integration algorithm can be used as the loading command of the loading equipment in real time and the relevant quantities collected by the acquisition equipment can be used as the numerical substructure. Numerical calculations of the inputs to the mixed test procedure.

[0058] ...

specific Embodiment approach 2

[0061] Specific embodiment two: this embodiment is a further limitation of specific embodiment one, such as figure 2 As shown, after the numerical substructure and test substructure of the structural model are divided, the test substructure is loaded by displacement-controlled loading.

[0062] In this embodiment, the division method of the structural model is a new division method. Taking the three-layer shear structure as an example, the new substructure division form is given. When the displacement control loading method is used to load the test substructure, figure 2 In the shown structure, from left to right are the original structure, experimental substructure and numerical substructure. The position of the dotted line in the figure indicates the division position of the first division method. Different from the first division method, the new substructure division affects the The division method of numerical substructure and experimental substructure is that the first ...

specific Embodiment approach 3

[0065] Specific embodiment three: this embodiment is a further limitation of specific embodiment one or two, such as figure 1 As shown, after the numerical substructure and test substructure of the structural model are divided, when the test substructure uses the force-controlled loading method to load the loading equipment, a controller is added to the outer ring of the model, which is specifically divided into the following two steps :

[0066] Step 1: Use the least squares algorithm to identify the model parameters of the specimen or the least mean square algorithm to identify the linear velocity feedback compensation parameters to achieve preliminary control;

[0067] Step 2: The minimum control synthesis algorithm is used to adapt to redundant nonlinearity and parameter changes, so as to realize the dynamic force uniaxial loading control strategy.

[0068] When the test substructure is loaded by the force-controlled actuator, it means that the test substructure is loaded...

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Abstract

The invention discloses a real-time hybrid test method based on an actuator and a vibration table. The method is applied to a vibration table hybrid test with a lower structure as a test piece and a hybrid test in a force control mode. Aiming at the application range, the invention provides an actuator-vibration table real-time hybrid test method. The real-time hybrid test method comprises the following steps: (1) two dynamic force loading strategies, namely (a) a dynamic force loading strategy based on a linear natural speed feedback compensation and minimum control synthesis method; (b) a dynamic force loading strategy based on an online test piece model updating and minimum control synthesis method; (2) a new substructure division form is given by taking a three-layer shearing type structure as an example, and boundary conditions can be realized by adopting a displacement control actuator. According to the invention, a new dynamic force loading strategy is adopted, the force controldifficulty is simplified, and the test difficulty is reduced; loading in a displacement mode is convenient, control is stable, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a real-time mixing test method, which belongs to the field of civil engineering. Background technique [0002] In recent years, building structures have been becoming larger and more complex. For the tests of this kind of buildings, the use of scale models will bring large scale errors. With the in-depth research of real-time test technology and calculation and communication With the rapid development of technology, the shaking table hybrid test method has gradually formed and developed to a certain extent. The conventional shaking table hybrid test can be divided into superstructure or substructure as the specimen. The shaking table hybrid test with the upper structure as the specimen includes a relatively complex shear force test system at the bottom of the specimen, and the absolute acceleration of the top layer of the numerical substructure is loaded on the shaking table. The shaking table hybrid test with the substructur...

Claims

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Application Information

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IPC IPC(8): G06F30/13G01M7/04G01M7/06G06F119/14
CPCG06F30/13G01M7/022G01M7/04G01M7/06G06F2119/14
Inventor 王贞石阿明
Owner WUHAN UNIV OF TECH
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