發(fā)布時(shí)間：2018-03-12 10:41

  本文選題：網(wǎng)絡(luò)控制系統(tǒng)　切入點(diǎn)：相空間重構(gòu)　出處：《電子學(xué)報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：針對(duì)網(wǎng)絡(luò)控制系統(tǒng)的時(shí)延預(yù)測(cè)問題,提出一種基于相空間重構(gòu)與最小二乘支持向量機(jī)的時(shí)延預(yù)測(cè)方法.首先利用0-1測(cè)試法確定時(shí)延序列具有混沌特性,引入相空間重構(gòu)技術(shù)提高預(yù)測(cè)精度.對(duì)實(shí)際采集的時(shí)延序列進(jìn)行Hurst指數(shù)分析,選擇最小二乘支持向量機(jī)作為預(yù)測(cè)模型.然后利用C-C方法確定時(shí)延序列相空間重構(gòu)參數(shù),通過遞歸圖確定時(shí)延序列的局部可預(yù)測(cè)性,利用遺傳算法對(duì)最小二乘支持向量機(jī)的參數(shù)進(jìn)行離線優(yōu)化.最后通過優(yōu)化后的最小二乘支持向量機(jī)并結(jié)合相空間重構(gòu)對(duì)時(shí)延序列進(jìn)行在線預(yù)測(cè).與其它預(yù)測(cè)方法進(jìn)行了仿真對(duì)比,結(jié)果表明本文方法具有更高的預(yù)測(cè)精度與更小的預(yù)測(cè)誤差,同時(shí)并未降低預(yù)測(cè)算法的實(shí)時(shí)性.
[Abstract]:For the networked control system with time delay prediction problems, put forward a prediction method of phase space reconstruction and least squares support vector machine based on the time delay. First determine the delay time series has chaotic characteristics by using the 0-1 test method, the phase space reconstruction technique to improve the prediction accuracy. The Hurst index analysis of the actual delay sequence collection, selection of the least squares support vector machine as the prediction model. Then use the C-C method to determine the parameters of phase space reconstruction delay sequence through recursive delay sequence diagram to determine local predictability, off-line optimization of the parameters of least squares support vector machine using genetic algorithm. Finally, the optimized least square support vector machine combined with phase space reconstruction is applied to the online prediction of the delay time series. Compared with other forecast methods, the results show that this method has higher prediction accuracy and smaller The prediction error does not reduce the real-time performance of the prediction algorithm.

【作者單位】： 沈陽工業(yè)大學(xué)信息科學(xué)與工程學(xué)院;東北大學(xué)計(jì)算機(jī)科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金(No.11273001) 遼寧省博士啟動(dòng)基金(No.20141070)
【分類號(hào)】：TP18;TP273

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬東玲;;相空間重構(gòu)中時(shí)間延遲的確定方法[J];硅谷;2013年19期

2 韓中合;朱霄s，

本文編號(hào)：1601201