基于空地數(shù)據(jù)鏈的航空發(fā)動機剩余壽命預(yù)測研究
[Abstract]:In order to adapt to the rapid development of large aircraft industry in our country, ensure the safety of aircraft, control the maintenance cost of aircraft, and realize the win-win situation of safety and benefit, Accurate prediction of the remaining life of aero-engine has become the core work in engine health management. In this paper, the engine health monitoring parameters are obtained based on the air-to-ground data link, the performance decline trend of the engine is analyzed, the recession model is established, the prediction algorithm is designed, and the prediction of the residual life of the engine is realized. Firstly, the standards and protocols of air-to-ground data link transmission monitoring data are introduced, the decoding and preprocessing of monitoring data are realized, and several key monitoring parameters are selected, which provides accurate data for subsequent prediction work. Secondly, a residual life prediction algorithm based on Kalman filter estimation is designed. In this algorithm, the multi-monitoring parameters are integrated in stages, the performance decline trend model of the engine is established based on the state space method, and the estimation of the model parameters is realized by Kalman filter. The Kalman filter prediction based on single-stage linear fusion and the Kalman filter prediction based on phased linear fusion are compared. The example analysis shows that the prediction based on phased linear Kalman filter has more accurate life distribution and better prediction evolution process. Thirdly, in view of the nonlinear mapping relationship between the health state of the engine and several monitoring parameters, an algorithm for predicting the residual life of the engine based on particle filter is designed. The algorithm combines phased processing with nonlinear processing to integrate multiple monitoring parameters. Based on the state space method, the engine performance decay model is established, and the parameter estimation of the model is realized by particle filter. Three prediction algorithms, particle filter prediction based on single-stage linear fusion, particle filter prediction based on phased linear fusion and particle filter prediction based on phased nonlinear fusion, are compared. The example analysis shows that the particle filter prediction based on phased nonlinear has more accurate life distribution and better prediction evolution process. Finally, based on MATLAB, an engine residual life prediction system is designed, which can realize data fusion, performance degradation modeling and prediction implementation function.
【學(xué)位授予單位】:南京航空航天大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:V23
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