拉式变换公式:式中:s=σ+jωZ变换公式式中,σ为实变数,ω为实变量,所以Z是一个幅度为,相位为ω的复变量。变换速查表序号拉氏变换E(s)时间函数e(t)Z变换E(z)11δ(t)12Tse110)()(nTnTtt1zz3s1)(1t1zz421st2)1(zTz531s22t32)1(2)1(zzzT611ns!ntn)(!)1(lim0aTnnnaezzan7as1ateaTezz82)(1asatte2)(aTaTezTze9)(assaate1))(1()1(aTaTezzze10))((bsasabbtateebTaTezzezz1122stsin1cos2sin2TzzTz1222sstcos1cos2)cos(2TzzTzz1322)(asteatsinaTaTaTeTzezTze22cos2sin1422)(asasteatcosaTaTaTeTzezTzez222cos2cos15aTsln)/1(1Tta/azz