由传递函数导出状态空间描述(ObtainingStateSpace Description from Transfer Function)直接分解法(Direct Decomposition) 并行分解法(Parallel Decomposition)·研究对象是SISO的常系数系统,且它的传递函数为:bos" +b,sm-1 +b,sm-2 +L +bm-1s+b,Y(s)G(s)(1. 50)U(s)s"+a,sn-1 +L +an-1s+an定义:当mf时,系统(1.50)是真有理系统(proper rationalsystem);当m<n时,系统(1.50)是严真系统(strictlypropersystem)实现问题
由传递函数导出状态空间描述(Obtaining State Space Description from Transfer Function) • 直接分解法(Direct Decomposition) • 并行分解法(Parallel Decomposition) (1.50) 定义:当 时,系统(1.50)是真有理系统(proper rational system);当m<n时,系统(1.50)是严真系统(strictly proper system) •研究对象是SISO的常系数系统,且它的传递函数为: 实现问题
·直接分解法(Direct Decomposition)b,s"-1 +b,sn-2 +L +bn-1s +b,Y(s)结论1G(s)(1. 51)m<nU(s)s" +aisn-1 +L +an-is+a,State space 严真系统(strictly proper systerdescription of010Lél0uéueOuuéx,<eereuueucou000L1ier,<euueueMMM0u=éMMueMu+éndu(1. 58)im克<euue0000L<euexn-luuu<eeuuL- attex. anan-2an-1Uéx,euet2u(1. 60)b, leMub.y=brb.lLéuexn-i uuuSx,(1.58)and(1.60)给出的状态空间描述,称为能控规范型/能实现问题控标准型(controllable canonical form)
(1.58) and (1.60)给出的状态空间描述, 称为能控规范型/能 控标准型(controllable canonical form) (1.58) (1.60) State space description of 严真系统(strictly proper system) : 结论 (1.51) 1 : •直接分解法(Direct Decomposition) 实现问题
·直接分解法(Direct Decomposition)Y(s)mfn结论2G(s) :U(s)(1. 61)+ (b - boadl)s"-1 +(b, - boa2)s"-2 +L +(br- - boan-1)s +(b, - boan)Eh.s" +a,sn-1 +L +an-is+anThen, the state space description of proper rationalsystem(真有理系统)can be represented as:i&= AX+bu(1. 69)cX+duy1couL00o i1éCoueu福00L10ueeub=éMMM0MiuA=éMWheree.ueu00L00u1eu<ee@l HLata,αn-1an-2c=b,-boa, bn1-boan- L b, -boa2 b -ba] d = [b。实现问题
Then, the state space description of proper rational system (真有理系统)can be represented as: (1.69) Where •直接分解法(Direct Decomposition) (1.61) 结论2 : 实现问题
Method 2:Parallel Decomposition(并行分解)结论1:(约当规范型)l,is the characteristic root of multiplicity r,lr,L ,lare the other distinct characteristic roots of D(s).1000LLLel,&O ué x,eueOuUeeteuüüSN&00110Muex2 u0000MMiéoendMie Mueuuuee.uuM010eMMi0uie2&O tuei=éo0,0u+éjtuLLLLXaeuueuéu(1. 79)L00L/O uexr+1telu1+eeeee3MMiMieM"eMM000ueUeuMu0M0MeMO ueMueM20u311u&L000LxteJordancanonical form实现问题
(1.79) Jordan canonical form is the characteristic root of multiplicity r, are the other distinct characteristic roots of D(s). Method 2: Parallel Decomposition(并行分解) 结论1:(约当规范型) 实现问题
üéx,<euex2ueMueiMiexü+kouy=[ku k2 L Lk.kue(1. 80)ex,+1ueMu<etiMue:UXnk,,i=r+l,L,nwhere.Yqi1limkk。= limG(s)= b[(s - 1,)"G(s)](j - 1)! s@/i ds j-S??Note that, k0=0, if m<n or b0=0k, = lim[(s - l ,)G(s)]sl实现问题
where , can be computed by (1.80) Note that, k0=0, if m<n or b0=0. 实现问题