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1
锛?/p>
1
锛夌敤鏁板�兼硶姹傞棬鍑芥暟
4
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t
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锛?/p>
2
锛夌敤绗﹀彿娉曠粰鍑哄嚱鏁?/p>
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t
f
t
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鐨勫倕閲屽彾鍙樻崲銆?/p>
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3
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3
4
2
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s
H
s
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s
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飥?/p>
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锛岀敾鍑鸿绯荤粺鐨勯浂鏋佺偣鍥俱�?/p>
2
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1
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f
t
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t
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飥?/p>
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骞呴鐗规�ф洸绾垮拰鐩搁鐗规�ф洸绾裤�?/p>
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2
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3
t
f
t
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杩涜閲囨牱锛岄噰鏍烽棿闅斾负
0.01
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3
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(
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f
t
t
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锛?/p>
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1000Hz
锛?/p>
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涓?/p>
5000 Hz
锛?/p>
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3
锛?/p>
1
锛夌敤绗﹀彿娉曞疄鐜板嚱鏁?/p>
4
(
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G
t
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鐩搁鐗规�ф洸绾裤�?/p>
锛?/p>
2
锛夊凡鐭ョ郴缁熷嚱鏁颁负
3
4
2
1
(
)
3
s
s
H
s
s
s
飥?/p>
飥?/p>
飥?
飥?/p>
飥?/p>
锛岃緭鍏ヤ俊鍙蜂负
(
)
sin(100
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f
t
t
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锛屾眰璇ョ郴缁熺殑
绋虫�佸搷搴斻�?/p>
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3
锛夊凡鐭ヨ緭鍏ヤ俊鍙蜂负
(
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sin(100
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f
t
t
飥?/p>
锛岃浇娉㈤鐜囦负
100Hz
锛岄噰鏍烽鐜囦负
400 Hz
锛?/p>
璇曚骇鐢熻緭鍏ヤ俊鍙风殑璋冮淇″彿銆?/p>
4
锛?/p>
1
锛夊凡鐭ョ郴缁熷嚱鏁颁负
2
3
1
(
)
3
s
s
H
s
s
s
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飥?/p>
飥?
飥?/p>
飥?/p>
锛岀敾鍑鸿绯荤粺鐨勯浂鏋佺偣鍥俱�?/p>
锛?/p>
2
锛夊凡鐭ュ嚱鏁?/p>
5(
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2
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(
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3
t
f
t
e
u
t
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飥?/p>
鐢ㄦ暟鍊兼硶缁欏嚭鍑芥暟
(3
)
f
t
鐨勫箙棰戠壒鎬ф洸绾垮拰鐩搁鐗?/p>
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3
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3
4
2
1
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3
s
s
H
s
s
s
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飥?/p>
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飥?/p>
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鐨勯鐜囧搷搴斻�?/p>
锛?/p>
4
锛夊凡鐭ヨ緭鍏ヤ俊鍙蜂负
(
)
cos(100
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f
t
t
飥?/p>
锛岃浇娉㈤鐜囦负
100Hz
锛岄噰鏍烽鐜囦负
400 Hz
锛?
璇曚骇鐢熻緭鍏ヤ俊鍙风殑璋冪浉淇″彿銆?/p>
5
锛?/p>
1
锛夌敤鏁板�兼硶缁欏嚭鍑芥暟
5(
2)
2
(
)
(
2)
3
t
f
t
e
u
t
飥?/p>
飥?/p>
飥?/p>
飥?/p>
骞呴鐗规�ф洸绾垮拰鐩搁鐗规�ф洸绾裤�?/p>
锛?/p>
2
锛夌敤绗﹀彿娉曞疄鐜板嚱鏁?
2
2
i
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飥?/p>
鐨勫倕閲屽彾閫嗗彉鎹€�?/p>
锛?/p>
3
锛?/p>
宸茬煡杈撳叆淇″彿涓?/p>
(
)
5sin(200
)
f
t
t
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锛?/p>
杞芥尝棰戠巼涓?/p>
1000Hz
锛?/p>
閲囨牱棰戠巼涓?/p>
5000 Hz
锛?
璇曚骇鐢熻緭鍏ヤ俊鍙风殑璋冮淇″彿銆?/p>