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Method for executing layout optimization on model analysis measurable nodes of numerical control machining equipment

A technology of mechanical processing and experimental modal analysis, applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problem that the optimization of measuring point layout cannot be fully and effectively realized, and the measuring point cannot meet the requirements of identifying the mode shape To optimize the number of measuring points and the location of measuring points, improve test efficiency, and overcome low efficiency

Active Publication Date: 2012-07-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the measuring points obtained by the effective independent method cannot meet the requirements of identifying the mode shape, so the arrangement optimization of the measuring points cannot be fully and effectively realized in terms of the number of measuring points and the location of the measuring points

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  • Method for executing layout optimization on model analysis measurable nodes of numerical control machining equipment
  • Method for executing layout optimization on model analysis measurable nodes of numerical control machining equipment
  • Method for executing layout optimization on model analysis measurable nodes of numerical control machining equipment

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Embodiment Construction

[0026] The present invention will be specifically described below in conjunction with the accompanying drawings.

[0027] figure 1 It is a flow block diagram of a method for performing layout optimization on experimental modal analysis measurement points of a numerically controlled machine tool according to the present invention. Such as figure 1 As shown in, the following will take the analysis of the structural experimental modal analysis of the XHK5140 vertical CNC machining center as an example to specifically illustrate the process steps of the present invention:

[0028] Firstly, through finite element simulation, the overall structural mode shape and corresponding mode shape matrix are obtained. The specific process is as follows: the size of the XHK5140 CNC machining center is obtained through actual measurement, and then the 3D modeling is carried out by the computer in the finite element analysis software MSC Patran, and finally the mesh division and modal analysis...

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Abstract

The invention discloses a method for executing layout optimization on experimental model analysis measurable nodes of numerical control machining equipment, which comprises the following steps: (1) obtaining the overall structure modal shape of the equipment and a corresponding modal shape matrix through finite element simulation; (2) determining and selecting a modal shape sensitive component of the equipment and a corresponding shape matrix by utilizing the overall structure modal shape; (3) selecting surface measurable nodes from the modal shape sensitive component, wherein the surface measurable nodes are used as objects to be optimized in layout; (4) performing iteration elimination on the surface measurable nodes by using an effective independence method; and (5) executing linear even node distribution on the modal shape sensitive component by adopting the Shannon's sampling theorem. Through the method for executing the layout optimization on the experimental model analysis measurable nodes of the numerical control machining equipment, the defects in the aspects that the traditional modal testing efficiency is low, the time is long and the like can be overcome, and the number of the measurable nodes and the positions of the measurable nodes can be optimized, and the testing efficiency can be increased on the premise of ensuring natural frequency and shape identification in numerical control machine structure modal testing.

Description

technical field [0001] The invention belongs to the field of structural modal testing of numerically controlled machining equipment, and in particular relates to a method for performing layout optimization on experimental modal measuring points of numerically controlled machining equipment. Background technique [0002] In recent years, measurement point optimization has attracted more and more attention. Measuring point selection is the basic problem of response signal picking in modal test analysis. In the modal experiment test of CNC machine tools, the selection of measuring points plays an important role in the structural modal identification. The so-called experimental modal analysis method is to implement artificial excitation through hammer, exciter or excitation table, and analyze the modal properties of the structure by measuring the input and output signals, so as to provide a reference for structural optimization and structural condition analysis. With the conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 李斌毛新勇刘红奇毛宽民彭芳瑜白向贺蔡辉
Owner HUAZHONG UNIV OF SCI & TECH
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