数字图像去噪盲复原算法改进研究(4)

第1期 钟义长:基于电流控制环的参数自适应永磁同步电机研究13

ASelf adaptiveCurrentControlMethodforPMSMBased

onParameterIdentification

ZHONGYi chang

(CollegeofAppliedTechnical,HunanInstituteofEngineering,Xiangtan411101,China)

Abstract:Forthepermanentmagneticsynchronousmotorservosystem,theperformanceofcurrentloopcontrollerturnsbadwiththeparametersofstatorresistanceandrotorfluxchanging,soanadaptivemeth odisproposedtoidentifyresistance,inductanceandPMfluxinapresentedmodel.Themotorinductanceisfirstlyidentifiedbystatisticalaverage.BasedonPopovsuper stabletheory,themodelreferenceidentifi cationisdesignedtoidentifystatorresistanceandrotorfluxandadjustthecoefficientsofPIDcontroller.ThesimulationresultsshowthatthesystemofPMSMbasedonparameteridentificationtracksquicklythechangingparametersandhavelessovershoot,morequicklydynamicresponse,goodrobustnessandhighsteady stateperformance.

Keywords:permanentmagnetsynchronousmotor(PMSM);currentloop;parameteridentification;mod elreference;adaptive

(上接第3页)

人民邮电出版社,2001:513-514.

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4 结 论

本章在介绍了NAS-RIF图像盲复原算法的基础上,针对该算法对噪声敏感这一不足,利用高阶累积量来抑制噪声,同时采用图像分割技术确定图

像的目标支持域,最后对新算法进行了仿真.实验结果表明新算法取得了比较好的复原效果.

参 考 文 献

ResearchonTechnologyofImageRestoration

QUZhen feng,LIXiao guang

(DepartmentofElectricalEngineeringandAutomation,LuoyangInstituteofScienceandTechnology,Luoyang471023,china)

Abstract:Withtherapiddevelopmentofmultimediaandcomputertechnology,imageprocessingtechnolo gyhasalreadybeenwidelyappliedtoalotoffields.ThispaperstudiestheNAS-RIFmethod,butitsper formanceispoorwhentheSNRislow.Animprovedmethodofusinghigherorderstatisticsandimageseg mentationtechnologyisproposed.Thesimulationshowsthatthenewmethodcanbringagoodperforman ceevenundertheexistingnoise.

Keywords:digitalimageprocessing;imagerestoration;non negativityandsupportconstraintsrecursive

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