第一章作業(yè)解答

1、.1).8sin()sin(1 )2();8sin()sin(211 ) 1 (:6138ttttP繪出下列各信號(hào)的波形習(xí)題.2.3.4.5dttttedtttdtttuttdtttutttj)()()7()6()sint()6()2()()4()2()() 3(000000t0,0t1,)t(u0002166sin601tje0001)2(000tttu.6dttdetr)()() 1 (dttdebdttdeatbrtartrdttdebdttdeatrtbetae)()()()()()()()()()(21212121)()()()()()()()()()(00000ttdttdettr

2、dttdetrtedtttdetrttete.7)1 ()()4(tetr)1 ()1 ()()()1 ()1 ()()(21212121tbetaetbrtartbetaetbetae)1 ()(1 )1 ()()1 ()()(0000ttettetetettettete) 1 ()01 ()0(eer.8)()()6(2tetr)()()()()()()()(22212122121tbetaetbrtartbetaetbetae)()()()()()(022020ttetetettettete.9tdetr5)()()8(tttdebdeatbrtardbeaetbetae52512152

3、121)()()()()()()()()(555000)()()()()()(ttttdedetedtettete05)(ttde5)() 1 (der.10tdetr)()()3()()(tedtdtr)2()()4(tetr)2()(tetr.11).()(,)()(),()(,)()(,2312211能假定起始時(shí)刻系統(tǒng)無儲(chǔ)的表達(dá)式響應(yīng)時(shí)試求當(dāng)激勵(lì)響應(yīng)時(shí)當(dāng)激勵(lì)有一線性時(shí)不變系統(tǒng)trttetuetrtutet)()()()()()(1212trdtdtrtedtdtetudtdt)()()()()()(2tuettetuetuedtdtrtttt)()()(2tuettrt.1222)()1

4、 (dttt02) 1(4dtttdttt)2(2dtttt)(2sin37)4(dtett)2()(ttet) 1()(ttu)()5(ttu)1()(tutudtd二計(jì)算或化簡(jiǎn)下列各式（每題二計(jì)算或化簡(jiǎn)下列各式（每題2 2分，共分，共2020分）分）tdttt)4)(1(211)-5u(t04202)(t2)e (2) 1t ( 0) 1t ( .13)(tf)121(tf三做圖題（共三做圖題（共1515分）分）1 1(5(5分分) )已知信號(hào)已知信號(hào)的波形如下圖所示，繪出的波形如下圖所示，繪出的圖形的圖形；一、一、5 5已知系統(tǒng)的輸入輸出關(guān)系為：已知系統(tǒng)的輸入輸出關(guān)系為：)()()(tutetr則該系統(tǒng)為（則該系統(tǒng)為（ ）系統(tǒng)。）系統(tǒng)。A. A. 線性、時(shí)變、因果線性、時(shí)變、因果 B. B. 線性、時(shí)不變