2022年信号与系统习题答案1-4章部分 .pdf
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1、第一章,第二章,第三章,第四章,第一章:1 找两个表示信号的例子,并指出信号表示的信息(消息)。1.1(1),1.1(5),1.1(9);1.2(4),1.2(6);1.3(a);1()(1)0.5*()2.5*(1)(3)f ttttt1.4(6),(1)6()jtfte,周期信号,周期为22T1.5(10);1.6(4);1.11(3),00000()()()()1jtjtjtjtjtetttdtet dtettdteee1.11(7)2221(1)()(1)()21/22(1)()2()2tttdtttt dtttt dtt dt1.11(8)221()21 2()2()2()tttxx
2、xdxxxx dxx dxt1.17(a)解:设左边加法器的输出为()x t,则积分器的输出为()x t。根据两个加法器的输入输出关系,可以得到()()3()()()2()x tf tx ty tx tx t因此文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R
3、4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW
4、4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E
5、6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档
6、编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2
7、K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M1
8、0B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY4M7R7R4N9 ZW4A7K1E6N10文档编码:CL2K7A7M10B2 HY
9、4M7R7R4N9 ZW4A7K1E6N10()()3()()()2()()3()2()3()()2()3()2()()2()3()()3()()2()x tfxx ty tx tx tfxx tf tx tfxf tx tx tfxf ty ty ty tftf t117(b)()()3()2()()3()2()()y tf ty ty ty ty ty tf t1.17(c)解:设左边加法器的输出为()x k,则()()(1)x kf kax k(1)()()(1)y kx kbx k(2)由 式(1)和(2)(1)(1)(2)(1)(1)(2)x kf kax ky kx kbx k因此
10、()()(1)(1)(2)()(1)(1)(2)()(1)(1)y kf kax kb f kax kf kbf ka x kbx kf kbf kay k即()(1)()(1)y kay kf kbf k117(d)()4()2(1)3(2)5(1)2(2)3(3)6(1)2(3)3(4)4()5(1)6(1)24(1)5(2)6(3)34(2)5(3)6(4)4()5(1)6(2)2(1)3(2)y kf kx kx kf kx kx kf kx kx kf kf kf kx kx kx kx kx kx kf kf kf ky ky k所以,输入输出方程是()2(1)3(2)4()5(1
11、)6(2)y ky ky kf kf kf k1.18 是否为线性系统(1)否;零输入响应20()xt为非线性响应,零输入响应和零状态响应也不是和的关系。(2)否;零状态响应2()ft为非线性响应。(3)否;零输入响应0()x t为非线性响应。(4)是;1.19 解:文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:C
12、F3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1
13、J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:C
14、F3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1
15、J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:C
16、F3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1
17、J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5(1)线性、时不变、因果、稳定;(2)非线性(零输入响应12(0)(0)xx为非线性响应)、
18、时不变、因果、不稳定(响应中0()tfd,例如信号()()f tt时,随时间增长变为无穷大。);(3)非线性(输出响应sin()f t为非线性响应)、时不变、因果、稳定;(4)线性、时变(响应(2)ft和初始时间有关系)、非因果(响应(1)f t,0t时刻的响应和之后的时刻1t有关系)、稳定;(5)非线性(响应()(2)f k f k为非线性响应)、时不变、因果、稳定;(6)线 性、时 变(响 应11(0)2kx为 和 初 始 时 刻 有 关 系 的 响 应)、非 因 果(响 应(1)(2)kf k,0k时刻的响应和之后的时刻2k有关系)、不稳定(响应中(1)(2)kf k,例如信号()()f
19、 kk时,随k增长变为无穷大。);1.21 解:零输入线性,包括零输入齐次性和零输入可加性。因为激励()0f t,故系统零状态响应()0fyt。对于零输入响应,已知3121(0)1,(0)0()23,0ttxxxyteet3122(0)0,(0)1()42,0ttxxxyteet根据零输入线性,可得12123(0)5,(0)3()5()3()2 29,0 xxxttxxy tytyteet响应;3()()229,0ttxy ty teet1.23 解:设初始状态12(0)1,(0)2xx时,系统的零输入响应为1()xyt;输入()()f tt时,系统的零状态响应为1()fyt,则有112312
20、31()()65()3()87ttxfttxfytyteeytytee联立,解方程组得文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9
21、HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I
22、6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9
23、HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I
24、6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9
25、HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I6W5文档编码:CF3N9L1H9I9 HC2K3E6J1J2 ZK3J8Z2I
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