精品文档序号拉氏变换E(s)时间函数e(t)Z变换E(z)11(t)12nsTe(tnT)nz31su(t)zz141尹tTz(z1)251s^t22!T2z(z1)2(z1)361尹t33!T3z(z24z1)6(z1)471s(1/l)lnaa"Tzza81saeatzalze91(sa)2teatTzeaT(zeaT)2101(sa)31 t2eat2-t-2aT-j-22aTTzeTze2(zeaT)2(zeaT)311as(sa)1eat(1eaT)z(z1)(zeaT)12as2(sa)t丄(1eaT)aTz(1eaT)z(z1)2a(z1)(zeaT)131(sa)(sb)(sc)eatebtzz(ba)(ca)(ab)(cb)ect(ac)(bc)(ba)(ca)(zeaT)(ab)(cb)(zebT)z(ac)(bc)(zecT)14sd(sa)(sb)(sc)(da)eat(db)ebt(ba)(ca)(ab)(cb)_(d-c)-ect(ac)(bc)(da)z(db)z(ba)(ca)(zeaT)(ab)(cb)(zebT)(dc)z(ac)(bc)(zecT)15abc1bceatcaebt(ba)(ca)(cb)(ab)abcte(ac)(bc)zbczcazs(sa)(sb)(sc)z1(ba)(ca)(zeaT)(cb)(ab)(zebT)abz(ac)(bc)(zecT)16s22sintzsinT2z2zcosT117ss22costz(zcosT)2z2zcosT118s22sinhtzsinhT2z2zcoshT119s22coshtz(zcoshT)2z2zcoshT1202s(s22)1costzz(zcoshT)z1z22zcoshT1精品文档21(Sa)22eaTsinTzeaTsinTz22zeaTcos1e2aT22saeaTcosTz2zeaTcosT(Sa)22z22zeaicosTe2ai23ba-atbteezz(Sa)(sb)alblzeze24a2b2b2a2i丄/.xUaTabTabt(ab)eeabTz(ab)zb2za2zs2(sa)(sb)abab(z1)2z1(ab)(zea‘)(ab)(zebT)。