Modal Parameter Identification Method Programming And Application Based On MFC

On the market,most of the existing modal parameter identification software are based on MATLAB,uneven and expensive.In terms of interactivity and integration with the operating system,the software based on MATLAB are worse than those based on MFC.And the operation speed is slower.So the software are not suitable for the actual project with a lot of data analysis.To solve these problems,Based on MFC,this paper develops a high-precise and high efficiency modal parameter identification system by using improved frequency domain principal component analysis.Finally,compared with commercial software,the effectiveness and correctness of the system are proved.The software has many advantages: clear and simple interface,easy operation,sensitive response.This paper provides a great support for multi-document multi-view programming based on MFC.The main contents of this paper are as follows:(1)Aiming at the shortcomings of MFC,such as the low efficiency of graph display,and the drawback of curve drawing in time domain signal,spectrum analysis and curve fitting,a detailed solution is proposed and a customized drawing control is developed.(2)Principal Component Analysis is combined with Frequency Domain Poly-Refernce to reduce the dimensions,noise and redundancy of the signal matrix effectively.The theoretical basis of the algorithm is explained in detail.The theory of the algorithm is explained in details.The formula of modal frequency,modal damping and the steps of algorithm are given.Then the main steps or parameters in the algorithm.(3)The overall design of the interface and the functions are determined in consideration of the purpose and requirements of the software.In addition,the function modules and the using steps of the software are introduced in detail.Then the GARTEUR model is used as a simulation example to verify the correctness and reliability of the algorithm.(4)The experimental data are collected by semicircular arch structure and experimental crane structure.The veracity and validity of the algorithm and the rapidity of the program are verified.