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1、第31卷第7期計算機仿真2014年7月文章編號:1006—9348(2014)07-0274-04人體搖擺步態(tài)動力學(xué)圖像建模與仿真陳非,黃山,張洪斌(1.四川大學(xué)電氣信息學(xué)院,四川成都610065;2.四JII大學(xué)計算機學(xué)院,四川成都610065)摘要:研究下肢疾病人體搖擺步態(tài)的準確建模問題。搖擺步態(tài)是下肢疾病患者行走時重要的步態(tài)特征,這種步態(tài)特征雖然帶有一定的規(guī)律性,但是這種規(guī)律導(dǎo)致特征對應(yīng)呈現(xiàn)凌亂性。傳統(tǒng)的基于視覺圖像建立的搖擺步態(tài)模型,沒有考慮這種疾病人體步態(tài)特征的凌亂問題,以犧牲誤差為代價,導(dǎo)致?lián)u擺步態(tài)識別度較低。為此,提出一種考慮病態(tài)人體動力學(xué)的凌亂搖擺步態(tài)建模方法,將病態(tài)
2、患者的步態(tài)特征視作多剛體連接系統(tǒng),利用人體動力學(xué)原理建立動力學(xué)模型,得到搖擺步態(tài)的肢體特征;對搖擺步態(tài)的周期性進行分析,建立病態(tài)腳步模型并確定行走時的腳步方位,得到搖擺步態(tài)的腳步特征。實驗結(jié)果表明,該方法建立的模型能夠快速準確地識別搖擺步態(tài)特征,誤差較小,識別率更高。關(guān)鍵詞:搖擺步態(tài);下肢疾?。粍恿W(xué)模型;步態(tài)特性中圖分類號:TP242文獻標識碼:BModelingandSimulationontheSwayingGaitDynamicsImageofHumanBodyCHENFei,HUANGShan.一.ZHANGHong—bin(1.SchoolofElectricalEngi
3、neeringandInformation,SiehuanUniversity,ChengduSichuan610065,China;2.CollegeofComputerScience,SichuanUniversity,ChengduSichuan610065,China)ABSTRACT:Theaccuratemodelingforswayinggaitofthehumanbodywithdiseaseoflowerlimbsisstudied.Swa—yinggaitisanimportantgaitcharacteristicwhenthepatientwalkswithd
4、iseasedlowerlimbs.Thegaitcharacteristichassomerules,however,theserulesmayleadtomessyofcorrespondingcharacteristics.Traditionalestablishedswa—yinggaitmodelbasedonvisualimagedidnotconsiderthemessyproblemofthiskindofpatient'sgait,whichistoex—penseoftheerrorandleadstoalowerrecognitiondegreeofswayin
5、ggait.Tothisend,amodelingmethodformessswayinggaitwithconsideringofmorbidityhumandynamicsisproposed.Thegaitcharacteristicofthepatientsislookedasamulti—rigid—bodyconnectionsystem.Thetheoryofhumanbodydynamicsisusedtoestablishthedynamicmodeltogetthecharacteristicsoflimbsandtrunkofswayinggait.Theper
6、iodicityofswayinggaitisanalyzed,themodelofmorbidityfootstepisestablished,and·theorientationofthemorbidityfootstepisdetermined,SOastothefootstepcharacteristicsofswayinggaitareobtained.TheexperimentalresuhsshowthattheestablishedmodelbyusingthismethodCanaccuratelyidentifytheswayinggaitcharacterist
7、ics,theerorislessandtherecognitionrateishigherthanthetraditionalmode1.KEYWORDS:Swayinggait;Lowerlimbdiseases;Dynamicmodel;Gaitcharacteristics1引言查提供可靠的技術(shù)支持”。因此,搖擺步態(tài)成為醫(yī)學(xué)領(lǐng)域搖擺步態(tài)是下肢疾病患者的重要體征。對搖擺步態(tài)進重要的研究對象,與正常人的步態(tài)相比,患者的搖擺步態(tài)對行建模分析,就是通過對患