資源描述:
《魯棒自適應(yīng)航向控制器的設(shè)計》由會員上傳分享,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。
1、摘要本文對基于逆推(Backstepping)方法的不確定非線性系統(tǒng)的控制理論及其在船舶運(yùn)動控制中的應(yīng)用進(jìn)行了研究。船舶航向控制器的設(shè)計是船舶運(yùn)動控制領(lǐng)域內(nèi)的重要研究課題之一,許多專家學(xué)者一直在致力于該方向的研究工作。但是當(dāng)今大部分船舶航向控制器的設(shè)計仍然采用Nomoto線性模型,忽略了船舶操縱運(yùn)動的非線性因素,未能徹底解決船舶的航向控制非線性問題。針對這一問題,本文基于逆推方法設(shè)計了自適應(yīng)控制器,通過仿真檢驗,結(jié)果表明,所設(shè)計的自適應(yīng)航向控制器可以較好的解決這一問題。本文首先概述了自動舵、非線性控制理
2、論和逆推方法的發(fā)展。介紹了逆推算法的設(shè)計原理,進(jìn)而總結(jié)出方法的優(yōu)越性和局限性。船舶運(yùn)動模型是研究船舶運(yùn)動控制的基礎(chǔ),針對船舶模型的非線性、時變性和不確定性的特點(diǎn),建立了非線性數(shù)學(xué)模型?;谀嫱圃O(shè)計方法,首先設(shè)計了一種參數(shù)已知的船舶航向控制器;然后對含有不確定參數(shù)和外界干擾的船舶運(yùn)動模型進(jìn)行自適應(yīng)控制器的設(shè)計,同時對虛擬控制增益參數(shù)進(jìn)行了反奇異值設(shè)計,不僅保證了閉環(huán)系統(tǒng)是全局一致最終有界,并且可以通過適當(dāng)?shù)恼{(diào)整參數(shù)來獲得更好的控制性能,在自適應(yīng)律中引入了“泄露項”,以防止參數(shù)漂移。最后,在Matlab的S
3、imulink下,對所設(shè)計的自適應(yīng)航向控制器進(jìn)行仿真檢驗,仿真結(jié)果表明,所設(shè)計的自適應(yīng)航向控制器具有良好的控制能力。關(guān)鍵詞:船舶航向控制;逆推設(shè)計;自適應(yīng)控制;非線性;參數(shù)估計RobustAdaptiveNonlinearDesignofShipCourseControllerAbstractInthispaper,thecontrolproblemofuncertainnonlinearsystembasedontheBacksteppingdesignmethodisdiscussed,andits
4、applicationtoshipcoursecontrollerisstudied.Theshipcoursecontrollerisoneofthemostimportantresearchtopicsofshipmotioncontrol,soalotofexpertsandscholarsareworkedhardonit.Nowadays,mostdesignsforshipcoursecontrollerbaseonlinearNomotomodel,whichneglectthenonli
5、nearfactorsofshipmotioncontrol,sotheproblemoftheshipmotioncontrolcan’tbesolvedcompletely.Aimatthisproblem,basedonBacksteppingdesignmethod,aadaptiveshipcoursecontrollerisdesigned.Thesimulationresultsshowthattheadaptivecoursecontrollerhasgoodperformance.Th
6、eshipmotionmodelsarethebasisofresearchingshipmotionmaneuvering.Aimedatthecharacteristicsofships,nonlinearmathematicalmodelofshipmotionisestablishedjnthepaper.Backsteppingdesignmethodisintroduced,anditsadvantagesanddisadvantagesaresummarized.BasedonBackst
7、eppingdesignmethod,ashipcoursecontrollerisdevelopedfortheshipmotionmodelwhichhasknownparameter.Then,anadaptivecontrollerisdevelopedfortheshipmotionmodelwhichhasunknownparameteranddisturbance,suchthattheresultingclosed—loopsystemisgloballyuniformlyultimat
8、elybounded(GUUB)andabettertransientperformancecanbeachievedbyanappropriateparametertuning.Thesimulationresultsshowthattheadaptivecoursecontrollerhasgoodperformance.Keywords:Shipcoursecontrol,Baeksteppingdesign,Adaptivecont