机械工程测试技术基础课后习题答案(10)
时间：2025-04-03
机械工程测试技术基础课后习题答案
H( )=
1
10 3
j +1
A( )=1+( )
2
=
1+(10 3
)
( )= arctan( )= arctan(10 3 )
Uy=10A(1000)sin(1000t+ (1000))=10 0.707sin(1000t+450)=7.07sin(1000t+450
)
4.11 解：A( )=
1+( )
2
( )= arctan( )
=10时，
A(10)=
1
+(0.05 10)
=0.816
(10)= arctan(0.05 10)=26.56°
(100)
=100时，
A=
1+(0.05 100)
=0.408
(100)= arctan(0.05 100)=78.69°
y(t)=0.5 0.816cos(10t+26.56°)+0.2 0.408cos(100t 45°+78.69°)=0.408cos(10t+26.56°
)+0.0816cos(100t+33.69°
)
5.1 t)=
e th(;(t 0, >0) 0;(t<0) R+
)
x( )=
h(t)×h(t+ )dt=
+
e te
(t+ dt
=
+
e
e
2 t
dt=
e2
5.2 x(t)=A1sin(
1t+
1
2
+A2sin(
2t+
2
2
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