拉氏變換基本性質(zhì)-資料下載頁(yè)
2025-08-05 06:15本頁(yè)面
【正文】 st esdtetdttedtetfsF???? ? ?????? ?????方法二 :利用線性迭加和時(shí)移定理 2202)1(1)()()]([1)]([)2()2()1()1(2)()(0ssessFtesFtfLsttuLtuttutttutft???????????????112)(tf方法三 :利用微分積分定理將 f(t)微分二次 222)1()]2()1(2)([])([setttLdttfdL???????? ???根據(jù)微分定理 : 22121239。139。222)1(1)()1()(0)0(0)0()0()0()(])([ssessFesFsffsffsFsdttfdL????????????????方法四 :利用卷積定理 f1(t)可以看作是 f1(t)自身的卷積 . 22111111)1(1)()1(1)()()()()(*)()(ssessFessFsFsFsFtftftf????????? )(1 tf? ?)(1 tf*利用所示矩形脈沖的 Laplace 變換式和本章所述拉氏變換的性質(zhì) ,求圖示函數(shù)的拉氏變換 . 1f?2?2?2?2 ?2?2 ?4(a) (b) ( c) (d) (e) (f) 2f4f3f5f 6f： )(1]2[)(21)()()2()()()()()1(1)()2()()()(221212211ssssxxssseeeeeeshxsheessFsFtttfdtdtfbessFtututfa???????????????????????????????????????)1(1/)()()(])([)]([)()()2()()()()()2(2)]2()([)()(221011331/3133sttesssFsdttfssFdfLtfLsFtftututfdftftutututtfc?????????????????????????????????????)]1(21[1)()(21)2()2()]2()([21)()]2()([2)()(224144ssesessFtftttututfdtdtututtfd???????????????????????????????或者由圖 (d)可知： SSStteSeSeSSSFSFtudftutftf???????????2222141341)1(211)(21)()2()(21)2()(21)(0????????????????SSSStteeSeSFSFtftututffeSSFSFtfetutuetfe????????2221616)1(21515)1(1)()()2()]4()2([)()()1(11)1()()()]2()([)()(??????????????????????????????作業(yè) 43 預(yù)習(xí) :
研究報(bào)告相關(guān)推薦
鄂ICP備17016276號(hào)-1