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1、第39卷第2期廣西大學(xué)學(xué)報(bào):自然科學(xué)版Vo1.39No.22014年4月JournalofGuangxiUniversity:NatSciEdApr.2014文章編號(hào):1001_7445(2014)02-0300-08基于阻尼多模式切換的主動(dòng)懸架最優(yōu)控制研究唐詩晨,陳龍,汪若塵,孫曉強(qiáng),施德華(江蘇大學(xué)汽車與交通工程學(xué)院,江蘇鎮(zhèn)江212013)摘要:針對(duì)傳統(tǒng)主動(dòng)懸架所需動(dòng)力源的功率較大,進(jìn)而導(dǎo)致其成本昂貴、結(jié)構(gòu)復(fù)雜等問題,以并聯(lián)三檔阻尼可調(diào)減振器的車輛全主動(dòng)懸架系統(tǒng)作為研究對(duì)象,分別設(shè)計(jì)了“軟”、“中”、“硬”三種阻尼工作模式,根據(jù)車輛實(shí)際行駛工況,確定了
2、阻尼工作模式間切換控制規(guī)則?;赟imulink/Stateflow進(jìn)行了阻尼多模式切換控制系統(tǒng)的設(shè)計(jì)及性能仿真,在有效的阻尼切換控制系統(tǒng)基礎(chǔ)上,根據(jù)不同阻尼工作模式下所側(cè)重的懸架性能指標(biāo),分別設(shè)計(jì)了針對(duì)性的主動(dòng)懸架作動(dòng)力最優(yōu)控制器?;趦煞N典型的道路行駛工況,對(duì)系統(tǒng)全局控制能力以及作動(dòng)力最優(yōu)控制器的局部有效性進(jìn)行了仿真分析,仿真結(jié)果表明,所設(shè)計(jì)的控制系統(tǒng)能夠有效提高車輛在不同道路行駛工況的綜合性能,其中,車身垂直加速度降幅最高可達(dá)10.45%,車輪動(dòng)載荷降幅最高可達(dá)9.46%。與此同時(shí),系統(tǒng)所需的主動(dòng)控制力相對(duì)于無阻尼切換控制降低了13.33%,減少了系
3、統(tǒng)能量消耗。關(guān)鍵詞:車輛;主動(dòng)懸架;多模式切換;最優(yōu)控制;綜合性能中圖分類號(hào):U463.33文獻(xiàn)標(biāo)識(shí)碼:AResearchonoptimalcontrolofactive—suspensionbasedondampingmulti-modalswitchingTANGShi—chen,CHENLong,WANGRuo—chen,SUNXiao—qiang,SHIDe—hua(SchoolofAutomobileandTrafficEngineering,JiangsuUniversity,Zhenjiang212013,China)Abstract:Con
4、sideringtheproblemofhighrequiredpowersourceoftraditionalactivesuspension,whichresultsinhighcostandcomplexstructures,theactivesuspensionsystemwithparalleledthreegearadjustabledamperwastakenastheresearchobject.Threeworkingmodes,namely‘soft’,‘medium’and‘hard’dampingmodesweredesignedr
5、espectively.Accordingtotheactualvehicledrivingcondition,switchingcontrolrulesbetweendampingmodesweredetermined.ByusingSimu-link/Stateflow,thedampingmuhi-modalswitchingcontrolsystemwasestablished,andperformancesimulationwasconducted.Onthebasisofeffectivedampingswitchingcontrolsyste
6、m,targetedopti—malcontrollersofactiveforceweredesignedrespectivelyaccordingtothefocusedsuspensionper-~rmanceindicatorsunderdifferentdampingworkingmodes.Onthe~undationoftwotypicalroaddrivingconditions,generalcontrolabilitiesofthesystemandpartialeffectivenessofactiveforceop—timalcon
7、trollersweresimulated.Theresultsshowedthatdesignedcontrolsystemcouldeffectivelyenhancetheoverallperformanceofthevehiclesuspensionunderdifferentdrivingconditions,ofwhichthebodyvenicalaccelerationdropcanbeupto10.45%andthewheeldynamicloaddropcanbeupto9.46%.Atthesametime,comparedtound
8、ampedswitchingcontrol,theneededac