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《基于硬件在環(huán)車輛半主動(dòng)懸架模糊混合控制策略開發(fā)與驗(yàn)證》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要半主動(dòng)懸架可以通過調(diào)節(jié)彈性元件剛度或阻尼器阻尼系數(shù)來適應(yīng)不同的路面,達(dá)到最優(yōu)減振效果。半主動(dòng)懸架系統(tǒng)涉及的關(guān)鍵技術(shù)是阻尼器的研制和控制策略的設(shè)計(jì),控制策略的設(shè)計(jì)直接影響半主動(dòng)懸架性能。傳統(tǒng)控制策略難以兼顧平順性與道路友好性,模糊控制作為一種新型智能控制方法,不需要建立被控對(duì)象精確數(shù)學(xué)模型,并且可以用仿人類智能的語(yǔ)言變量來建立控制規(guī)則,特別適合路面輸入為隨機(jī)激勵(lì)的車輛控制系統(tǒng)。硬件在環(huán)仿真技術(shù)是隨著計(jì)算機(jī)性能的不斷提高和軟件技術(shù)的快速發(fā)展而產(chǎn)生,由于仿真時(shí)引入部分硬件并且可以模擬極限工況,因而可以提高開發(fā)效率和仿真試驗(yàn)結(jié)果可信度,
2、降低控制系統(tǒng)開發(fā)成本。本文在建立四自由度1/2車輛半主動(dòng)懸架系統(tǒng)模型基礎(chǔ)上,開發(fā)了兼顧車輛平順性與道路友好性的新型模糊混合控制策略。為深入驗(yàn)證新型模糊混合控制策略的實(shí)車應(yīng)用可行性,自行開發(fā)了以FreescaleMC9S12XDP512為核心處理器的電子控制單元,結(jié)合MATLAB/Real.timeWindowsTarget模塊構(gòu)建了半主動(dòng)懸架系統(tǒng)硬件在環(huán)仿真平臺(tái),并利用上述平臺(tái)開展了新型模糊混合控制策略硬件在壞仿真試驗(yàn)。試驗(yàn)結(jié)果表明,與天棚控制、地棚控制相比,模糊混合控制策略可以有效兼顧車輛平順性與道路友好性。與軟件仿真相比,基于硬
3、件在環(huán)仿真方式仿真模型前輪輪胎動(dòng)態(tài)載荷系數(shù)、后輪輪胎動(dòng)態(tài)載荷系數(shù)和車身垂向加速度加權(quán)均方根值變化很小,仿真結(jié)果較為吻合,證明新型模糊混合控制策略具有較好的實(shí)車應(yīng)用可行性。關(guān)鍵詞:半主動(dòng)懸架系統(tǒng);硬件在環(huán)仿真;模糊混合控制策略;平順性;道路友好性AbstractInordertoachievethedesiredeffect,thesemi-activesuspensionadapttodifferentkindsofloadbyadjustingthedampingorspringstiffness.Thekeytechnologi
4、esofsemi-activesuspensionarethedevelopmentofthedamperandtheselectionofthecontrolstrategy.Thecontrolstrategywillaffecttheperformanceofsemi—activesuspension.TraditionalcontrolstrategyCalla’tkeepbalancebetweenridecomfortandroad—friendliness.Asanewintelligentcontrolmethod,
5、fuzzycontroldoesnotneedtoestablishanaccuratemodelofthecontrolledobjectandCanestablishcontrolrulesinthewayofimitatinghumanintelligence,SOthiscontrolstrategyisparticularlysuitableforthesemi-activesuspensionwhichroadinputisrandom.Withthedevelopmentofcomputerperformanceand
6、softwaretechnology,thehardwareinloopsimulationemerges.BecausethismodeintroducessomephysicalmodelsandCansimulatesinextremeconditions,itCanimprovedevelopmentefficiency,enhancethecredibilityofsimulationresultsandreducethecostsofcontrolsystemdevelopment.Inthisstudy,ahalf-c
7、armodelofsemi-activesuspensionsystemsvvitll4degreesoffreedomwasestablished.a(chǎn)ndthenaninnovativefuzzyhybridcontrolstrategyconsideringbothridequalityandroad-friendlinesswasdeveloped.Fordeeplyverifyingtheapplicationoftheproposedcontrolstrategyinrealvehicles,aplatformofhard
8、ware--in··the·-loopforevaluatingtheproposedcontrolstrategyofsemi--activesuspensionsystemsusingaself-designedelectroni