延边大学学报(自然科学版)
延邊大學學報(自然科學版)
연변대학학보(자연과학판)
JOURNAL OF YANBIAN UNIVERSITY(NATURAL SCIENCE EDITION)
2013年
4期
294-297
,共4页
船舶电网%随机子空间%最小二乘法%谐波
船舶電網%隨機子空間%最小二乘法%諧波
선박전망%수궤자공간%최소이승법%해파
marine power system%stochastic subspace identification%least square method%harmonic
船舶电网的谐波源密集,产生的谐波直接影响船舶通信和导航设备的正常工作.针对强噪声背景下,谐波参数不易准确检测的问题,将随机子空间理论(SSI)和最小二乘法运用于船舶电网的谐波检测.首先将采集到的电网电流信号构成 Hankel矩阵,然后经矩阵 QR分解和奇异值分解(SVD),得到谐波频率,进而求出谐波幅值和相位.在 Matlab7.1/Simulink环境下搭建船舶电网谐波源模型,仿真结果表明该方法检测精度高、抗干扰能力强、简便易行,具有良好的工程应用前景.
船舶電網的諧波源密集,產生的諧波直接影響船舶通信和導航設備的正常工作.針對彊譟聲揹景下,諧波參數不易準確檢測的問題,將隨機子空間理論(SSI)和最小二乘法運用于船舶電網的諧波檢測.首先將採集到的電網電流信號構成 Hankel矩陣,然後經矩陣 QR分解和奇異值分解(SVD),得到諧波頻率,進而求齣諧波幅值和相位.在 Matlab7.1/Simulink環境下搭建船舶電網諧波源模型,倣真結果錶明該方法檢測精度高、抗榦擾能力彊、簡便易行,具有良好的工程應用前景.
선박전망적해파원밀집,산생적해파직접영향선박통신화도항설비적정상공작.침대강조성배경하,해파삼수불역준학검측적문제,장수궤자공간이론(SSI)화최소이승법운용우선박전망적해파검측.수선장채집도적전망전류신호구성 Hankel구진,연후경구진 QR분해화기이치분해(SVD),득도해파빈솔,진이구출해파폭치화상위.재 Matlab7.1/Simulink배경하탑건선박전망해파원모형,방진결과표명해방법검측정도고、항간우능력강、간편역행,구유량호적공정응용전경.
Marine power system harmonics source is crowded,the resulting harmonics directly affect the ma-rine Communication and navigation equipment to work properly.For the strong background noise,harmonic parameters difficult to accurately detect the problem,stochastic subspace identification theory (SSI)and the least squares method used in the marine power grid harmonics detection.Gather grid current signal form Han-kel matrix,the QR decomposition and singular value decompostion (SVD),get harmonic frequency,and then obtained the harmonic amplitude and phase.Environment to build the ship in Matlab7.1/Simulink harmonic source model,simulation results show that the method detects with high precision,strong anti-interference, simple,with good prospects for engineering applications.