机械工程测试技术基础课后习题答案(7)
时间:2025-04-03
时间:2025-04-03
机械工程测试技术基础课后习题答案
且 Td= ∴ 2
=6.28
12
d
d
= n
=
2
1 6.281
n
=
2
=
(0.13)
2
1.01
系统的传递函数 H(s)=
Y(s)=kXsS
22 S
2+
n
+1
n
=
3
S
2
(1.01)2+2 0.13×S1.01
+1
该装置在无阻尼固有频率处的频率响应 由H(j
)=Y( K)X =
2
j
÷2÷ (j )1
+ +n
n =
K
1
2÷
+2j n÷ n ∴ H(j
Kn)=
2
=3
0.26j 1 ÷n÷ +2j
n
d
为有阻尼固有频率
M=0.5, 2
d
=
T
=1 ÷ M=e
2
÷
=
1 2
=0.215 lnM÷
+1
d
=
n
2
,∴ n
=
d
1.02
2
= S=3