A time-varying linear structure working mode parameter identification method, device and application

A linear structure and working mode technology, applied in the direction of adaptive control, general control system, instrument, etc., can solve the problems of easy identification of false modes, cumbersome determination, large amount of calculation, etc.

A linear structure and working mode technology, applied in the direction of adaptive control, general control system, instrument, etc., can solve the problems of easy identification of false modes, cumbersome determination, large amount of calculation, etc.

CN104698837BActive Publication Date: 2017-10-20HUAQIAO UNIVERSITY
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  • A time-varying linear structure working mode parameter identification method, device and application
  • A time-varying linear structure working mode parameter identification method, device and application
  • A time-varying linear structure working mode parameter identification method, device and application

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Embodiment

[0083] Such as figure 1 As shown, the time-varying structure operating mode parameter identification device based on limited memory principal component analysis of the present invention includes a signal input module, a signal conditioning module, a data collector, an A / D data acquisition conversion module, a DSP, and a control module , storage module, power supply and reset module. In order to achieve high-speed, real-time data collection and processing, the system design adopts ARM+DSP dual-core architecture, DSP unit realizes data collection, analysis and processing, and ARM realizes multi-thread work, responsible for data storage, monitoring management, network transmission and other tasks, fully Give full play to the ability of DSP signal processing and ARM control.

[0084] Data acquisition is completed by signal input module, signal conditioning module, data collector, A / D data acquisition conversion module, DSP, etc. This device filters, amplifies, and samples the col...

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Abstract

The invention relates to a time-varying structure working modal parameter identification method based on limited memory principal component analysis, which can only use non-stationary vibration response signals for dynamic systems with time-varying structural characteristics to identify working modal parameters and identify the structure The working mode parameters can effectively monitor the dynamic characteristics of the system in real time, and can be used for vibration control, equipment fault diagnosis, health monitoring, and system structure analysis and optimization. This method only recognizes the parameter characteristics of the system by the measured response signal, without measuring the load signal, and it is proved from mathematical theory analysis and experiment, giving the method a physical meaning. The present invention also relates to a working mode measurement device based on the above method, which measures the vibration response signal and identifies the working mode parameters, obtains the real-time online dynamic characteristic changes of the system structure, and uses it for large complex engineering structures (bridges, Rails, etc.) in fault diagnosis and health monitoring analysis.

Description

technical field [0001] The present invention relates to a time-varying linear structural working modal parameter identification method based on limited memory principal component analysis, and the application of the method in structural fault diagnosis and health state monitoring, and also relates to a time-varying linear structure based on limited memory principal component analysis. A variable linear structure working mode parameter identification device. Background technique [0002] The analysis of vibration characteristics of structures is highly valued in the fields of aerospace vehicles, submarines, civil engineering, ships, automobiles, etc., especially the modal analysis. Modal analysis provides an effective way to study various vibration characteristics. Accurate identification of modal parameters (modal frequency, mode shape, damping ratio) is an important guarantee for the safety and maintainability of the system structure, and an important method for structural...

Claims

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Application Information

Patent Timeline
20 Oct 2017
Publication
CN104698837B
IPC
G05B13/04
Inventors
王成; 官威