振动与冲击
振動與遲擊
진동여충격
JOURNAL OF VIBRATION AND SHOCK
2014年
4期
7-10
,共4页
核递推最小二乘%自适应均衡%故障诊断%冲击故障
覈遞推最小二乘%自適應均衡%故障診斷%遲擊故障
핵체추최소이승%자괄응균형%고장진단%충격고장
kernel recursive least square (KRLS)%adaptive equalization%fault diagnosis%impact fault
针对传统的自适应均衡方法存在的不足,提出了一种基于核递推最小二乘(KRLS )的非线性系统自适应均衡方法。该方法通过引入核函数,将原始的非线性数据映射到高维特征空间,然后在高维特征空间中实施标准最小二乘算法。提出的方法并与传统的非线性系统均衡方法进行了对比分析,仿真研究表明,提出的方法优于传统的均衡方法,能很好的消除传递通道的影响,有效地提取出弱冲击性成分。最后,将提出的方法应用到转子系统的弱冲击性故障提取中,实验结果进一步验证了提出的方法的有效性。
針對傳統的自適應均衡方法存在的不足,提齣瞭一種基于覈遞推最小二乘(KRLS )的非線性繫統自適應均衡方法。該方法通過引入覈函數,將原始的非線性數據映射到高維特徵空間,然後在高維特徵空間中實施標準最小二乘算法。提齣的方法併與傳統的非線性繫統均衡方法進行瞭對比分析,倣真研究錶明,提齣的方法優于傳統的均衡方法,能很好的消除傳遞通道的影響,有效地提取齣弱遲擊性成分。最後,將提齣的方法應用到轉子繫統的弱遲擊性故障提取中,實驗結果進一步驗證瞭提齣的方法的有效性。
침대전통적자괄응균형방법존재적불족,제출료일충기우핵체추최소이승(KRLS )적비선성계통자괄응균형방법。해방법통과인입핵함수,장원시적비선성수거영사도고유특정공간,연후재고유특정공간중실시표준최소이승산법。제출적방법병여전통적비선성계통균형방법진행료대비분석,방진연구표명,제출적방법우우전통적균형방법,능흔호적소제전체통도적영향,유효지제취출약충격성성분。최후,장제출적방법응용도전자계통적약충격성고장제취중,실험결과진일보험증료제출적방법적유효성。
Aiming at defects of the traditional self-adaptive equalization,a new self-adaptive equalization method based on kernel recursive least-square(KRLS)was proposed.With the proposed method,the original nonlinear data were mapped to a high-dimensional feature space by introducing a kernel function.Then,the standard least-square algorithm was implemented in the high-dimensional feature space.the proposed method was compared with the traditional self-adaptive equalization one.The simulation results showed that the proposed method is supiror to the raditional self-adaptive equalization one;the new method can effectively eliminate the influence of transfer channels.Finally,the proposed method was applied to extraction of weak impact faults in a rotor system,the test results verified the validity of the proposed method.