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1、汽車制造技術(shù)現(xiàn)代制造工程(ModernManufacturingEngineering)2011年第6期基于平順性的油氣懸架參數(shù)動態(tài)分析與優(yōu)化+蔡祥文1,谷正氣1’2,李偉平1,梁小波3,彭國譜3(1湖南大學(xué)汽車車身先進設(shè)計制造國家重點實驗室,長沙410082;2湖南工業(yè)大學(xué),株洲412007;3湘潭電機集團重裝分公司,湘潭411100)摘要:以提高汽車行駛平順性為目的,對油氣懸架系統(tǒng)參數(shù)進行優(yōu)化。建立油氣懸架系統(tǒng)的二自由度1/4車輛數(shù)學(xué)模型?;跀?shù)學(xué)模型,在Matlab/Simulink軟件中利用模塊組合的方法建立仿真模型,并構(gòu)建以車身垂直方向的加權(quán)加速度均
2、方根值為目標函數(shù)的優(yōu)化模型。優(yōu)化算法采用遺傳算法,通過編程將仿真模型、優(yōu)化模型結(jié)合起來,實現(xiàn)Simulink、遺傳算法對油氣懸架系統(tǒng)參數(shù)的動態(tài)聯(lián)合優(yōu)化設(shè)計。利用該方法對某礦用自卸車前油氣懸架設(shè)計階段的結(jié)構(gòu)參數(shù)進行優(yōu)化,仿真結(jié)果表明:由該方法確定的油氣懸架結(jié)構(gòu)參數(shù)使車身垂直方向的加權(quán)加速度均方根值下降29.35%,加速度功率譜密度共振峰值降低23.6%,從而明顯改善了汽車的行駛平順性,同時也為其他類型的非線性懸架系統(tǒng)的動態(tài)優(yōu)化設(shè)計提供了借鑒。關(guān)鍵詞:油氣懸架;Simulink軟件;遺傳算法;動態(tài)優(yōu)化中圖分類號:TIB91.9文獻標志碼:A文章編號:167l—31
3、33(2011)06—0053—05Hydro-pneumaticsuspensionparametersdynamicaloptimizationdesignbasedonridecomfortCA[Xiang—wenl,GUZheng—qil’2,LIWei—pin91,HANGXiao—b03,PENGGuo—pu3(1StateKeyLaboratoryofAdvancedDesignandManufactureforVehicleBody,HunanUniversity,Changsha410082,China;2HunanUniversityofT
4、echnology,Zhuzhou412007,Hunan,China;3XiangtanElectricManufacturingGroupHeavy-dutyEquipmentCo.Ltd.,Xiangtan411100,Hunan,China)Abstract:Toimprovevehicleridecomfort,hydro—pneumaticsuspensionsystemparameterswereoptimized.Mathematicmodelofa2-DOFquarter-carmodelwithhydro·pneumaticsuspensi
5、onsystemwasestablishedandthen,thesimulationmodelwasdevelopedbymeansofcombinationmodulesofSimulink,andoptimaldesignmodelUSestherootme.a(chǎn)nsquarevalueofbodyverticalacceler-ationas,theobjectivefunction.Optimizationusinggeneticalgorithms,byprogrammingthesimulationmodelcombinedoptimization
6、model,andtheoptimalhydro—pneumaticsuspensionparameterswereobtainedafterthecombinedoptimizationdesignbetweenSimulinkandGeneticAlgorithm(GA).Thestructuralparametersoffronthydro-pneumaticofaminingdumptruckwereopti-mizedduringdesignstageusingthismethod,thesimulationresultsshowthat:thero
7、otmeansquarevalueofbodyverticalacceler-ationwasbroughtdownby29.35%,powerspectraldensityofbodyverticalaccelerationwasdecreasedby23.6%,SOthevehicleridecomfortcanbesignificantlyimproved,whichalsoprovidedreferencesforthedynamicoptimizationdesignofothertypesofnonlinearsuspensionsystem.Ke
8、ywords:hydro—pneuma