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1、遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)第33頁(yè)基于遺傳算法的PID參數(shù)優(yōu)化設(shè)計(jì)摘要PID調(diào)節(jié)器是最早發(fā)展起來(lái)的控制策略之一,遺傳算法是一種借鑒生物界自然選擇和自然遺傳學(xué)機(jī)理上的迭代自適應(yīng)概率性搜索算法。本文提出了一種基于遺傳算法的PID控制器參數(shù)優(yōu)化設(shè)計(jì)。遺傳算法模仿生物進(jìn)化的步驟,在優(yōu)化過(guò)程中引入了選擇,交叉,變異等算子,選擇是從父代種群中將適應(yīng)度較高的個(gè)體選擇出來(lái),以?xún)?yōu)化種群;交叉是從種群中隨機(jī)地抽取一對(duì)個(gè)體,并隨機(jī)地選擇多位進(jìn)行交叉,生成新樣本,達(dá)到增大搜索空間的目的;變異是為了防止選擇和交叉丟
2、失重要的遺傳信息,它對(duì)個(gè)體按位進(jìn)行操作,以提高GA的搜索效率和全局搜索能力。通過(guò)適應(yīng)度函數(shù)來(lái)確定尋優(yōu)方向,與其他一些常規(guī)整定方法相比,遺傳算法比較簡(jiǎn)便,整定精度較高。本文用遺傳算法對(duì)柴油機(jī)調(diào)速系統(tǒng)的PID參數(shù)進(jìn)行了優(yōu)化,對(duì)該系統(tǒng)進(jìn)行了仿真,實(shí)驗(yàn)結(jié)果表明該種算法的有效性,也表明遺傳算法是一種簡(jiǎn)單高效的尋優(yōu)算法,與傳統(tǒng)的尋優(yōu)方法相比明顯地改善了控制系統(tǒng)的動(dòng)態(tài)性能。關(guān)鍵詞:遺傳算法;PID控制器;參數(shù)優(yōu)化遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)第33頁(yè)Basedongeneticalgorithmoptimi
3、zationofPIDparametersAbstractPIDregulatorisoneofthefirstdevelopedoneofthecontrolstrategy,geneticalgorithmisakindofnaturalselectionfrombiologicalgeneticsandnaturalmechanismoftheiterativeadaptiveprobabilisticsearchalgorithm.Inthispaper,ageneticalgorithm
4、basedontheOptimalDesignofPIDcontrollerparameters.Geneticalgorithmstoimitatethestepsofbiologicalevolution,intheoptimizationprocessoftheintroductionofselection,crossoverandmutationoperators,etc.,choosefromtheparentpopulationwilladapttoahigherdegreeofind
5、ividualchoiceinordertooptimizethepopulation;crossrandomlyfromthepopulationtocollectapairofindividuals,andanumberofrandomlyselectedcross,generatenewsamples,toachievethepurposeofincreasingsearchspace;variationistopreventthelossofchoiceandcross-important
6、geneticinformation,carriedoutbyitsindividualoperations,inordertoenhanceGA'ssearchefficiencyandglobalsearchability.Throughthefitnessfunctiontodeterminetheoptimaldirection,andsettinganumberofotherconventionalmethods,geneticalgorithmissimple,accuratetuni
7、ng.Inthispaper,geneticalgorithmofthePIDspeedcontrolsystemofdieselengineparametersareoptimized,thesystemsimulation,experimentalresultsshowthatthealgorithmalsoshowsthatthegeneticalgorithmisasimpleandefficientoptimizationalgorithm,withthetraditionaloptim
8、izationmethodssignificantlyimprovedthecontrolsystemdynamicperformance.Keywords:geneticalgorithm;PIDcontroller;parameteroptimization遼寧科技大學(xué)本科生畢業(yè)設(shè)計(jì)(論文)第33頁(yè)目錄摘要IAbstractII1綜述11.1選題背景11.2PID參數(shù)優(yōu)化方法綜述21.3本論文主要工作92遺傳算法112.1遺傳算法的簡(jiǎn)介112.1.1遺傳算法的歷史和發(fā)展112.