{"id":2138,"date":"2023-04-07T21:01:25","date_gmt":"2023-04-07T21:01:25","guid":{"rendered":"https:\/\/vibromera.eu\/?p=2138"},"modified":"2026-07-02T19:45:53","modified_gmt":"2026-07-02T19:45:53","slug":"application-of-the-fourier-transform-to-the-analysis-of-vibration-signals","status":"publish","type":"post","link":"https:\/\/vibromera.eu\/ko\/example\/application-of-the-fourier-transform-to-the-analysis-of-vibration-signals\/","title":{"rendered":"\uc9c4\ub3d9 \uc2e0\ud638 \ubd84\uc11d\uc5d0 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc744 \uc801\uc6a9\ud569\ub2c8\ub2e4."},"content":{"rendered":"

\uc9c4\ub3d9 \uc2e0\ud638 \ubd84\uc11d\uc5d0 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc758 \uc801\uc6a9<\/h1>\n

\uc548\ub4dc\ub808\uc774 \uc178\ucf54\ubca4\ucf54. \ubc14\uc774\ube0c\ub85c\uba54\ub77c\uc758 \uac1c\ubc1c\uc790\uc774\uc790 \ucc3d\ub9bd\uc790 \uc911 \ud55c \uba85\uc785\ub2c8\ub2e4.
\n\uc774 \uae00\uc758 \ubc88\uc5ed\uc5d0\ub294 \ubd80\uc815\ud655\ud55c \ub0b4\uc6a9\uc774 \ud3ec\ud568\ub418\uc5b4 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\ud478\ub9ac\uc5d0 \ubcc0\ud658 \ubc0f \uc2e0\ud638 \uc2a4\ud399\ud2b8\ub7fc<\/h2>\n

\ub300\ubd80\ubd84\uc758 \uacbd\uc6b0, (\uacc4\uc0b0\ud558\uc5ec) \uc2a4\ud399\ud2b8\ub7fc<\/a> \uc2e0\ud638\uc758 \ucc98\ub9ac\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uc0d8\ud50c\ub9c1\uc744 \ud1b5\ud574 \uc791\ub3d9\ud558\ub294 ADC\uac00 \uc788\uc73c\uba70 \uc8fc\ud30c\uc218<\/a> Fd\ub294 \uc2dc\uac04 T \ub3d9\uc548 \uc785\ub825\uc73c\ub85c \ub4e4\uc5b4\uc624\ub294 \uc5f0\uc18d \uc2e0\ud638\ub97c N\uac1c\uc758 \ub514\uc9c0\ud138 \uc0d8\ud50c\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4. \uadf8\ub7f0 \ub2e4\uc74c \uc774 \uc0d8\ud50c \ubc30\uc5f4\uc740 \uc5b4\ub5a4 \ud504\ub85c\uadf8\ub7a8(\uc608\ub97c \ub4e4\uc5b4 \ud478\ub9ac\uc5d0\uc2a4\ucf54\ud504<\/a><\/span>) N\/2\uac1c\uc758 \uc22b\uc790 \uac12\uc744 \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/p>\n

\ud504\ub85c\uadf8\ub7a8\uc774 \uc62c\ubc14\ub974\uac8c \uc791\ub3d9\ud558\ub294\uc9c0 \ud655\uc778\ud558\uae30 \uc704\ud574 \ub450 \uac1c\uc758 sin(10*2*pi*x)+0.5*sin(5*2*pi*x)\uc758 \ud569\uc73c\ub85c \uc0d8\ud50c \ubc30\uc5f4\uc744 \uad6c\uc131\ud558\uace0 \ud504\ub85c\uadf8\ub7a8\uc5d0 \uc785\ub825\ud569\ub2c8\ub2e4. \ud504\ub85c\uadf8\ub7a8\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uacb0\uacfc\ub97c \ub3c4\ucd9c\ud588\uc2b5\ub2c8\ub2e4:
\n

\"\ud478\ub9ac\uc5d0

\uadf8\ub9bc 1 \uc2e0\ud638\uc758 \uc2dc\uac04 \ud568\uc218 \uadf8\ub798\ud504<\/span><\/i><\/em><\/p><\/div><\/p>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 2 \uc2e0\ud638 \uc2a4\ud399\ud2b8\ub7fc \uadf8\ub798\ud504<\/p><\/div>\n

 <\/p>\n

There are two \ubc30\uc74c<\/a> \uc2a4\ud399\ud2b8\ub7fc \uadf8\ub798\ud504\ub97c \ubcf4\uba74 \u2013 \uc9c4\ud3ed 0.5V\uc758 5Hz\uc640 \uc9c4\ud3ed 1V\uc758 10Hz\uac00 \ub098\ud0c0\ub098\uba70, \ubaa8\ub4e0 \uac83\uc774 \uc6d0\ubcf8 \uc2e0\ud638\uc758 \uacf5\uc2dd\uacfc \uc77c\uce58\ud569\ub2c8\ub2e4. \uc544\ubb34 \ubb38\uc81c \uc5c6\uace0, \ud504\ub85c\uadf8\ub7a8\uc774 \uc815\uc0c1\uc801\uc73c\ub85c \uc791\ub3d9\ud569\ub2c8\ub2e4.<\/p>\n

\uc989, \ub450 \uac1c\uc758 \uc815\ud604\ud30c\uac00 \ud63c\ud569\ub41c \uc2e4\uc81c \uc2e0\ud638\ub97c ADC \uc785\ub825\uc5d0 \uacf5\uae09\ud558\uba74 \ub450 \uac1c\uc758 \uace0\uc870\ud30c\ub85c \uad6c\uc131\ub41c \uc720\uc0ac\ud55c \uc2a4\ud399\ud2b8\ub7fc\uc744 \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\ub530\ub77c\uc11c \uc9c4\uc9dc <\/span><\/b><\/strong>\uce21\uc815\ub41c \uc2e0\ud638 \uc758 5\ucd08 \uc9c0\uc18d \uc2dc\uac04<\/span><\/b><\/strong>\ub85c \ub514\uc9c0\ud138\ud654\ub41c, \uc989 ADC\ub85c \ud45c\uc2dc\ub418\ub294 \ubd88\uc5f0\uc18d <\/span><\/b><\/strong>\uc0d8\ud50c\uc5d0\ub294 \ubd88\uc5f0\uc18d \ube44\uc8fc\uae30\uc801 <\/span><\/b><\/strong>\uc2a4\ud399\ud2b8\ub7fc.
\n\uc218\ud559\uc801 \uad00\uc810\uc5d0\uc11c \ubcfc \ub54c \uc774 \ubb38\uad6c\uc5d0\ub294 \uba87 \uac1c\uc758 \uc624\ub958\uac00 \uc788\uc744\uae4c\uc694? <\/span><\/i><\/em><\/p>\n

\uc774\uc81c \ub3d9\uc77c\ud55c \uc2e0\ud638\ub97c 0.5\ucd08 \ub3d9\uc548 \uce21\uc815\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 3 0.5\ucd08\uc758 \uce21\uc815 \uae30\uac04\uc5d0 \ub300\ud55c sin(10*2*pi*x)+0.5*sin(5*2*pi*x) \ud568\uc218\uc758 \uadf8\ub798\ud504.<\/p><\/div>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 4 \uae30\ub2a5\uc758 \uc2a4\ud399\ud2b8\ub7fc<\/p><\/div>\n

 <\/p>\n

\uc5ec\uae30 \ubb54\uac00 \uc798\ubabb\ub418\uc5c8\uc2b5\ub2c8\ub2e4! 10Hz\uc758 \uace0\uc870\ud30c\ub294 \uc815\uc0c1\uc801\uc73c\ub85c \uadf8\ub824\uc9c0\uace0 5Hz\uc758 \uace0\uc870\ud30c \ub300\uc2e0 \ubd88\ubd84\uba85\ud55c \uace0\uc870\ud30c\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc778\ud130\ub137\uc5d0\uc11c \uadf8\ub4e4\uc740 \uc0d8\ud50c \ub05d\uc5d0 0\uc744 \ucd94\uac00\ud574\uc57c \uc2a4\ud399\ud2b8\ub7fc\uc774 \uc815\uc0c1\uc801\uc73c\ub85c \uadf8\ub824\uc9c4\ub2e4\uace0 \ub9d0\ud569\ub2c8\ub2e4.<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 5 \uc0d8\ud50c\uc5d0 \ucd5c\ub300 5\ucd08\uae4c\uc9c0 0\uc744 \ucd94\uac00\ud588\uc2b5\ub2c8\ub2e4.<\/p><\/div>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 6. \ud68d\ub4dd\ud55c \uc2a4\ud399\ud2b8\ub7fc.<\/p><\/div>\n

 <\/p>\n

\uc804\ud600 \uadf8\ub807\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774\ub860\uc744 \uc0b4\ud3b4\ubd10\uc57c \ud560 \uac83 \uac19\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc73c\ub85c \uac00 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4 \uc704\ud0a4\ubc31\uacfc<\/b><\/strong><\/a><\/span>\u00a0- \uc9c0\uc2dd\uc758 \uc6d0\ucc9c\uc785\ub2c8\ub2e4.<\/p>\n

\uc5f0\uc18d \ud568\uc218\uc640 \ud478\ub9ac\uc5d0 \uae09\uc218 \ud45c\ud604<\/h2>\n

\uc218\ud559\uc801\uc73c\ub85c \uc9c0\uc18d \uc2dc\uac04\uc774 T\ucd08\uc778 \uc2e0\ud638\ub294 {0, T} \uac04\uaca9\uc5d0 \uc8fc\uc5b4\uc9c4 \ud568\uc218 f(x)\uc785\ub2c8\ub2e4(\uc774 \uacbd\uc6b0 X\ub294 \uc2dc\uac04\uc785\ub2c8\ub2e4). \uc774\ub7ec\ud55c \ud568\uc218\ub294 \ud56d\uc0c1 \uc0ac\uc778 \ub610\ub294 \ucf54\uc0ac\uc778 \ud615\ud0dc\uc758 \uc870\ud654 \ud568\uc218(\uc0ac\uc778 \ub610\ub294 \ucf54\uc0ac\uc778)\uc758 \ud569\uc73c\ub85c \ub098\ud0c0\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\"\uc5f0\uc18d

\u00a0(1), \uc5ec\uae30\uc11c:<\/p>\n

<\/p><\/div>\n

k\ub294 \uc0bc\uac01\ud568\uc218\uc758 \uc218(\uace0\uc870\ud30c \uc131\ubd84\uc758 \uc218, \uace0\uc870\ud30c\uc758 \uc218)\uc785\ub2c8\ub2e4.
\nT - \ud568\uc218\uac00 \uc815\uc758\ub41c \uc138\uadf8\uba3c\ud2b8(\uc2e0\ud638\uc758 \uc9c0\uc18d \uc2dc\uac04)
\nAk - k-th \uace0\uc870\ud30c \uc131\ubd84\uc758 \uc9c4\ud3ed\uc785\ub2c8\ub2e4,
\n\u03b8k - k\ubc88\uc9f8 \uace0\uc870\ud30c \uc131\ubd84\uc758 \ucd08\uae30 \uc704\uc0c1
\n\"\ud568\uc218\ub97c \uae09\uc218\uc758 \ud569\uc73c\ub85c \ud45c\ud604\ud55c\ub2e4\"\ub294 \uac83\uc740 \ubb34\uc5c7\uc744 \uc758\ubbf8\ud560\uae4c\uc694? \uac01 \uc9c0\uc810\uc5d0\uc11c \ud478\ub9ac\uc5d0 \uae09\uc218\uc758 \uace0\uc870\ud30c \uc131\ubd84\uc758 \uac12\uc744 \ub354\ud558\uba74 \ud574\ub2f9 \uc9c0\uc810\uc5d0\uc11c \ud568\uc218\uc758 \uac12\uc744 \uad6c\ud560 \uc218 \uc788\ub2e4\ub294 \ub73b\uc785\ub2c8\ub2e4.
\n(\ubcf4\ub2e4 \uc5c4\ubc00\ud788 \ub9d0\ud558\uba74 \ud568\uc218 f(x)\ub85c\ubd80\ud130\uc758 \uae09\uc218\uc758 \ud3c9\uade0 \uc81c\uacf1 \ud3b8\ucc28\ub294 0\uc774 \ub418\ub294 \uacbd\ud5a5\uc774 \uc788\uc9c0\ub9cc, \ud3c9\uade0 \uc81c\uacf1 \uc218\ub834\uc5d0\ub3c4 \ubd88\uad6c\ud558\uace0 \ud568\uc218\uc758 \ud478\ub9ac\uc5d0 \uae09\uc218\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \uc810 \ub2e8\uc704\ub85c \uc218\ub834\ud560 \ud544\uc694\ub294 \uc5c6\uc2b5\ub2c8\ub2e4. )
\n\uc774 \uc2dc\ub9ac\uc988\ub294 \uc591\uc2dd\uc73c\ub85c\ub3c4 \uc791\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\"(2),\"

(2),<\/p><\/div>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\uc5b4\ub514 \"\uc9c4\ub3d9 kth \ubcf5\uc18c \uc9c4\ud3ed\uc785\ub2c8\ub2e4.<\/p>\n

 <\/p>\n

\ub610\ub294<\/p>\n

\"

(3)<\/p><\/div>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\uacc4\uc218 (1)\uacfc (3)\uc758 \uad00\uacc4\ub294 \ub2e4\uc74c \uacf5\uc2dd\uc73c\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4:<\/p>\n

\"\ud478\ub9ac\uc5d0<\/p>\n

 <\/p>\n

 <\/p>\n

\"\ud478\ub9ac\uc5d0<\/p>\n

 <\/p>\n

 <\/p>\n

\ud478\ub9ac\uc5d0 \uae09\uc218\uc758 \uc774 \uc138 \uac00\uc9c0 \ud45c\ud604\uc740 \ubaa8\ub450 \uc644\uc804\ud788 \ub3d9\ub4f1\ud558\ub2e4\ub294 \uc810\uc5d0 \uc720\uc758\ud558\uc2ed\uc2dc\uc624. \ub54c\ub85c\ub294 \ud478\ub9ac\uc5d0 \uae09\uc218\ub97c \ub2e4\ub8f0 \ub54c \uc0ac\uc778\uacfc \ucf54\uc0ac\uc778 \ub300\uc2e0 \ud5c8\uc218 \uc9c0\uc218 \ud615\ud0dc, \uc989 \ubcf5\uc18c\uc218 \ud615\ud0dc\uc758 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \ub354 \ud3b8\ub9ac\ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc5ec\uae30\uc11c\ub294 \ud478\ub9ac\uc5d0 \uae09\uc218\ub97c \ud574\ub2f9 \uc9c4\ud3ed\uacfc \uc704\uc0c1\uc744 \uac00\uc9c4 \ucf54\uc0ac\uc778\uc758 \ud569\uc73c\ub85c \ub098\ud0c0\ub0b4\ub294 \uacf5\uc2dd (1)\uc744 \uc0ac\uc6a9\ud558\ub294 \ud3b8\uc774 \ub354 \ud3b8\ub9ac\ud569\ub2c8\ub2e4. \uc5c4\ubc00\ud788 \ub9d0\ud558\uba74 \uc2e4\uc218 \uc2e0\ud638\uc758 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc740 \uc2e4\uc81c\ub85c \ubcf5\uc18c \uacc4\uc218(\ud615\uc2dd (3))\ub97c \uc0dd\uc131\ud558\uba70, \uac01 \uacc4\uc218\ub294 \ud574\ub2f9 \uace0\uc870\ud30c\uc758 \uc9c4\ud3ed\uacfc \uc704\uc0c1\uc744 \ubaa8\ub450 \ub2f4\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc2e4\uc218 \uc2e0\ud638\uc758 \uacbd\uc6b0 \uc774\ub7ec\ud55c \ubcf5\uc18c \uacc4\uc218\ub294 \ucf24\ub808(\uc5d0\ub974\ubbf8\ud2b8) \ub300\uce6d\uc744 \uac00\uc9c0\ubbc0\ub85c, \uc74c\uc218 \uc8fc\ud30c\uc218 \uc808\ubc18\uc740 \uc591\uc218 \uc8fc\ud30c\uc218 \uc808\ubc18\uc744 \ub2e8\uc21c\ud788 \ubc18\uc601\ud560 \ubfd0 \ucd94\uac00 \uc815\ubcf4\ub97c \ub2f4\uace0 \uc788\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uadf8\ub798\uc11c \ubcf5\uc18c \uacc4\uc218\ub85c\ubd80\ud130 \uc5b8\uc81c\ub098 \uacf5\uc2dd (1)\uc758 \uc2e4\uc218 \ube44\uc74c\uc218 \uc9c4\ud3ed Ak\uc640 \uc704\uc0c1 \u03b8k\ub85c \ub118\uc5b4\uac08 \uc218 \uc788\uc73c\uba70, \ubd84\uc11d \ud504\ub85c\uadf8\ub7a8\uc774 \ud45c\uc2dc\ud558\ub294 \uac83\ub3c4 \ubc14\ub85c \uc774 \uc9c4\ud3ed \uc2a4\ud399\ud2b8\ub7fc\uc785\ub2c8\ub2e4.<\/p>\n

 <\/p>\n

\uacb0\ub860:<\/span><\/b><\/u><\/strong>
\n<\/span><\/b><\/strong>\uc2e0\ud638\uc758 \uc2a4\ud399\ud2b8\ub7fc \ubd84\uc11d\uc758 \uc218\ud559\uc801 \uae30\ucd08\ub294 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc785\ub2c8\ub2e4.<\/span><\/b><\/strong>
\n<\/span><\/b><\/strong>
\n<\/span><\/b><\/strong>\ud478\ub9ac\uc5d0 \ubcc0\ud658\uc744 \uc0ac\uc6a9\ud558\uba74 {0, T} \uad6c\uac04\uc5d0\uc11c \uc815\uc758\ub41c \uc5f0\uc18d \ud568\uc218 f(x)(\uc2e0\ud638)\ub97c {0, T} \uad6c\uac04\uc5d0\uc11c\ub3c4 \uc9c4\ud3ed\uacfc \uc704\uc0c1\uc774 \ud655\uc2e4\ud55c \uc0bc\uac01 \ud568\uc218(\uc0ac\uc778 \ubc0f\/\ub610\ub294 \ucf54\uc0ac\uc778)\uc758 \ubb34\ud55c\ud55c \uc218(\ubb34\ud55c \uae09\uc218)\uc758 \ud569\uc73c\ub85c \ub098\ud0c0\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uae09\uc218\ub97c \ud478\ub9ac\uc5d0 \uae09\uc218\ub77c\uace0 \ud569\ub2c8\ub2e4.<\/span><\/b><\/strong><\/p>\n

\ud478\ub9ac\uc5d0 \ubcc0\ud658\uc744 \uc2e0\ud638 \ubd84\uc11d\uc5d0 \uc62c\ubc14\ub974\uac8c \uc801\uc6a9\ud558\ub824\uba74 \uba87 \uac00\uc9c0 \uc0ac\ud56d\uc744 \ub354 \uc774\ud574\ud574\uc57c \ud569\ub2c8\ub2e4. \uc804\uccb4 X\ucd95\uc5d0\uc11c \ud478\ub9ac\uc5d0 \uae09\uc218(\uc0ac\uc778 \uace1\uc120\uc758 \ud569)\ub97c \uace0\ub824\ud558\uba74 {0, T} \uad6c\uac04 \ubc16\uc5d0\uc11c\ub294 \ud478\ub9ac\uc5d0 \uae09\uc218 \ud568\uc218\uac00 \uc8fc\uae30\uc801\uc73c\ub85c \ubc18\ubcf5\ub41c\ub2e4\ub294 \uac83\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc608\ub97c \ub4e4\uc5b4 \uadf8\ub9bc 7\uc758 \uadf8\ub798\ud504\uc5d0\uc11c \uc6d0\ub798 \ud568\uc218\ub294 {-T\\2, +T\\2} \uac04\uaca9\uc5d0 \uc815\uc758\ub418\uc5b4 \uc788\uace0 \ud478\ub9ac\uc5d0 \uae09\uc218\ub294 \uc804\uccb4 x\ucd95\uc5d0 \uc815\uc758\ub41c \uc8fc\uae30 \ud568\uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n

\uc774\ub294 \uc0ac\uc778 \uace1\uc120 \uc790\uccb4\uac00 \uc8fc\uae30 \ud568\uc218\uc774\ubbc0\ub85c \uadf8 \ud569\ub3c4 \uc8fc\uae30 \ud568\uc218\uac00 \ub418\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 7 \ud478\ub9ac\uc5d0 \uae09\uc218\uc5d0 \uc758\ud55c \ube44\uc8fc\uae30\uc801 \uc18c\uc2a4 \ud568\uc218\uc758 \ud45c\ud604<\/p><\/div>\n

\ub530\ub77c\uc11c:<\/p>\n

\uc6d0\ub798 \ud568\uc218\ub294 \uae38\uc774 T\uc758 \uc77c\ubd80 \uc138\uadf8\uba3c\ud2b8\uc5d0 \uc815\uc758\ub41c \uc5f0\uc18d\uc801\uc774\uace0 \ube44\uc8fc\uae30\uc801\uc778 \ud568\uc218\uc785\ub2c8\ub2e4.
\n\uc774 \ud568\uc218\uc758 \uc2a4\ud399\ud2b8\ub7fc\uc740 \ubd88\uc5f0\uc18d\uc801\uc774\uba70, \uc989 \ubb34\ud55c\ud55c \uace0\uc870\ud30c \uc131\ubd84\uc778 \ud478\ub9ac\uc5d0 \uae09\uc218\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4.
\n\uc0ac\uc2e4 \ud478\ub9ac\uc5d0 \uae09\uc218\ub294 {0, T} \uad6c\uac04\uc5d0\uc11c \uc6b0\ub9ac\uc758 \ud568\uc218\uc640 \uc77c\uce58\ud558\ub294 \uc8fc\uae30 \ud568\uc218\ub97c \uc815\uc758\ud558\uc9c0\ub9cc, \uc6b0\ub9ac\uc5d0\uac8c \uc774 \uc8fc\uae30\uc131\uc774 \ud544\uc218\uc801\uc778 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4.<\/p>\n

\ub2e4\uc74c.<\/p>\n

\uace0\uc870\ud30c \uc131\ubd84\uc758 \uc8fc\uae30\ub294 \ucd08\uae30 \ud568\uc218 f(x)\uac00 \uc815\uc758\ub418\ub294 {0, T} \uac04\uaca9\uc758 \ubc30\uc218\uc785\ub2c8\ub2e4. \uc989, \uace0\uc870\ud30c\uc758 \uc8fc\uae30\ub294 \uc2e0\ud638 \uce21\uc815 \uae30\uac04\uc758 \ubc30\uc218\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud478\ub9ac\uc5d0 \uae09\uc218\uc5d0\uc11c \uccab \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uc8fc\uae30\ub294 \ud568\uc218 f(x)\uac00 \uc815\uc758\ub418\ub294 \uac04\uaca9 T\uc640 \uac19\uc2b5\ub2c8\ub2e4. \ud478\ub9ac\uc5d0 \uae09\uc218\uc5d0\uc11c \ub450 \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uc8fc\uae30\ub294 \uac04\uaca9 T\/2\uc640 \uac19\uc2b5\ub2c8\ub2e4. \ub4f1\ub4f1(\uadf8\ub9bc 8 \ucc38\uc870).<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 8 \ud478\ub9ac\uc5d0 \uae09\uc218 \uace0\uc870\ud30c \uc131\ubd84\uc758 \uc8fc\uae30(\uc8fc\ud30c\uc218)(\uc5ec\uae30\uc11c\ub294 T=2\u03c0)<\/p><\/div>\n

\ub530\ub77c\uc11c \uace0\uc870\ud30c \uc131\ubd84\uc758 \uc8fc\ud30c\uc218\ub294 1\/T\uc758 \ubc30\uc218\uc785\ub2c8\ub2e4. \uc989, \uace0\uc870\ud30c \uc131\ubd84\uc758 \uc8fc\ud30c\uc218\ub294 Fk= k\\T\uc774\uba70, \uc5ec\uae30\uc11c k\ub294 0\uc5d0\uc11c \u221e\uae4c\uc9c0\uc758 \uac12(\uc608: k=0 F0=0, k=1 F1=1\\T, k=2 F2=2\\T, k=3 F3=3\\T;....)\uc744 \uc2e4\ud589\ud569\ub2c8\ub2e4. Fk= k\\T(\uc81c\ub85c \uc8fc\ud30c\uc218\uc5d0\uc11c, \uc0c1\uc218 \uc131\ubd84).<\/p>\n

\ucd08\uae30 \ud568\uc218\ub294 T=1\ucd08 \ub3d9\uc548 \uae30\ub85d\ub41c \uc2e0\ud638\ub77c\uace0 \uac00\uc815\ud569\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \uccab \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uc8fc\uae30\ub294 \uc2e0\ud638\uc758 \uc9c0\uc18d \uc2dc\uac04 T1=T=1\ucd08\uc640 \uac19\uace0 \uace0\uc870\ud30c\uc758 \uc8fc\ud30c\uc218\ub294 1Hz\uc640 \uac19\uc2b5\ub2c8\ub2e4. \ub450 \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uc8fc\uae30\ub294 \uc2e0\ud638\uc758 \uc9c0\uc18d \uc2dc\uac04\uc744 2\ub85c \ub098\ub208 \uac12(T2=T\/2=0.5\ucd08)\uacfc \uac19\uace0 \uc8fc\ud30c\uc218\ub294 2Hz\uc785\ub2c8\ub2e4. \uc138 \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uacbd\uc6b0 T3=T\/3\ucd08\uc774\uace0 \uc8fc\ud30c\uc218\ub294 3Hz\uc785\ub2c8\ub2e4. \ub4f1\ub4f1.<\/p>\n

\uc774 \uacbd\uc6b0 \uace0\uc870\ud30c \uc0ac\uc774\uc758 \ub2e8\uacc4\ub294 1Hz\uc785\ub2c8\ub2e4.<\/p>\n

\ub530\ub77c\uc11c \uc9c0\uc18d \uc2dc\uac04\uc774 1\ucd08\uc778 \uc2e0\ud638\ub294 \uc8fc\ud30c\uc218 \ubd84\ud574\ub2a5\uc774 1Hz\uc778 \uace0\uc870\ud30c \uc131\ubd84\uc73c\ub85c \ubd84\ud574(\uc2a4\ud399\ud2b8\ub7fc\uc744 \uc5bb\uae30 \uc704\ud574)\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.
\n\uc8fc\ud30c\uc218 \ubd84\ud574\ub2a5\uc744 2\ubc30 \ub192\uc5ec 0.5Hz\ub85c \ub9cc\ub4e4\ub824\uba74, \uce21\uc815 \uc2dc\uac04\uc744 2\ubc30 \ub298\ub824 2\ucd08\ub85c \ud574\uc57c \ud569\ub2c8\ub2e4. 10\ucd08 \ubd84\ub7c9\uc758 \uc2e0\ud638\ub294 0.1Hz\uc758 \uc8fc\ud30c\uc218 \ubd84\ud574\ub2a5\uc73c\ub85c \uace0\uc870\ud30c \uc131\ubd84(\uc2a4\ud399\ud2b8\ub7fc)\uc73c\ub85c \ubd84\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc8fc\ud30c\uc218 \ubd84\ud574\ub2a5\uc744 \ub192\uc77c \uc218 \uc788\ub294 \ub2e4\ub978 \ubc29\ubc95\uc740 \uc5c6\uc2b5\ub2c8\ub2e4. \ub2f9\uc0ac\uc758 FFT \ud574\uc0c1\ub3c4 \uacc4\uc0b0\uae30<\/a>.<\/p>\n

\uc0d8\ud50c \ubc30\uc5f4\uc5d0 0\uc744 \ucd94\uac00\ud558\uc5ec \uc2e0\ud638 \uc9c0\uc18d \uc2dc\uac04\uc744 \uc778\uc704\uc801\uc73c\ub85c \ub298\ub9b4 \uc218 \uc788\ub294 \ubc29\ubc95\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc2e4\uc81c \uc8fc\ud30c\uc218 \ubd84\ud574\ub2a5\uc740 \uc99d\uac00\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc774\uc0b0 \uc2e0\ud638\uc640 \uc774\uc0b0 \ud478\ub9ac\uc5d0 \ubcc0\ud658<\/h2>\n

\ub514\uc9c0\ud138 \uae30\uc220\uc758 \ubc1c\ub2ec\ub85c \uce21\uc815 \ub370\uc774\ud130(\uc2e0\ud638) \uc800\uc7a5 \ubc29\uc2dd\uc774 \ubc14\ub00c\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\uc804\uc5d0\ub294 \uc2e0\ud638\ub97c \ud14c\uc774\ud504 \ub808\ucf54\ub354\uc5d0 \ub179\uc74c\ud558\uc5ec \uc544\ub0a0\ub85c\uadf8 \ud615\ud0dc\ub85c \ud14c\uc774\ud504\uc5d0 \uc800\uc7a5\ud560 \uc218 \uc788\uc5c8\uc9c0\ub9cc, \uc774\uc81c\ub294 \uc2e0\ud638\ub97c \ub514\uc9c0\ud138\ud654\ud558\uc5ec \ucef4\ud4e8\ud130 \uba54\ubaa8\ub9ac\uc758 \ud30c\uc77c\uc5d0 \uc22b\uc790(\uce74\uc6b4\ud2b8) \uc9d1\ud569\uc73c\ub85c \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n

\uc2e0\ud638 \uce21\uc815 \ubc0f \ub514\uc9c0\ud138\ud654\uc758 \uc77c\ubc18\uc801\uc778 \ubc29\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

\uce21\uc815 \ud2b8\ub79c\uc2a4\ub4c0\uc11c -- \uc2e0\ud638 \ub178\uba40\ub77c\uc774\uc800 -- ADC -- \ucef4\ud4e8\ud130
\n(\uadf8\ub9bc 9 \uce21\uc815 \ucc44\ub110\uc758 \uac1c\ub7b5\ub3c4)<\/p>\n

<\/span><\/i><\/em><\/p>\n

\uce21\uc815 \ud2b8\ub79c\uc2a4\ub4c0\uc11c\uc758 \uc2e0\ud638\ub294 T \uc2dc\uac04 \ub3d9\uc548 ADC\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4. T \uc2dc\uac04 \ub3d9\uc548 \uc218\uc2e0\ub41c \uc2e0\ud638 \ud310\ub3c5\uac12(\uc0d8\ud50c\ub9c1)\uc740 \ucef4\ud4e8\ud130\ub85c \uc804\uc1a1\ub418\uc5b4 \uba54\ubaa8\ub9ac\uc5d0 \uc800\uc7a5\ub429\ub2c8\ub2e4.<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 10 \ub514\uc9c0\ud138\ud654\ub41c \uc2e0\ud638 - \uc2dc\uac04 T \ub3d9\uc548 \uc218\uc2e0\ub41c N\uac1c\uc758 \uc0d8\ud50c<\/p><\/div>\n

\uc2e0\ud638 \ub514\uc9c0\ud138\ud654 \ub9e4\uac1c\ubcc0\uc218\uc5d0 \ub300\ud55c \uc694\uad6c \uc0ac\ud56d\uc740 \ubb34\uc5c7\uc778\uac00\uc694? \uc785\ub825\ub41c \uc544\ub0a0\ub85c\uadf8 \uc2e0\ud638\ub97c \uc774\uc0b0 \ucf54\ub4dc(\ub514\uc9c0\ud138 \uc2e0\ud638)\ub85c \ubcc0\ud658\ud558\ub294 \uc7a5\uce58\ub97c \uc544\ub0a0\ub85c\uadf8-\ub514\uc9c0\ud138 \ucee8\ubc84\ud130(ADC)\ub77c\uace0 \ud569\ub2c8\ub2e4(\u00a9 \uc704\ud0a4).<\/p>\n

ADC\uc758 \uae30\ubcf8 \ub9e4\uac1c\ubcc0\uc218 \uc911 \ud558\ub098\ub294 \ucd5c\ub300 \uc0d8\ud50c\ub9c1 \uc18d\ub3c4(\uc2dc\uac04\uc801\uc73c\ub85c \uc5f0\uc18d\uc801\uc778 \uc2e0\ud638\uc758 \uc0d8\ud50c\ub9c1 \ube48\ub3c4)\uc785\ub2c8\ub2e4. \uc0d8\ud50c\ub9c1 \uc18d\ub3c4\ub294 \ud5e4\ub974\uce20 \ub2e8\uc704\ub85c \uce21\uc815\ub429\ub2c8\ub2e4. ((\u00a9 \uc704\ud0a4))<\/p>\n

Kotelnikov’s theorem(\ucf54\ud154\ub2c8\ucf54\ud504 \uc815\ub9ac)\uc5d0 \ub530\ub974\uba74, \uc5f0\uc18d \uc2e0\ud638\uc758 \uc2a4\ud399\ud2b8\ub7fc\uc774 \uc8fc\ud30c\uc218 Fmax\ub85c \uc81c\ud55c\ub418\uc5b4 \uc788\uc73c\uba74 \uc2dc\uac04 \uac04\uaca9 \u0394t \u2264 1\/(2*Fmax)\ub85c \ucc44\ucde8\ud55c \uc774\uc0b0 \uc0d8\ud50c, \uc989 \uc0d8\ud50c\ub9c1 \uc8fc\ud30c\uc218 Fd \u2265 2*Fmax\uc5d0\uc11c \uc644\uc804\ud558\uace0 \uc720\uc77c\ud558\uac8c \uc7ac\uad6c\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc5ec\uae30\uc11c Fd – \uc0d8\ud50c\ub9c1 \uc8fc\ud30c\uc218; Fmax – \uc2e0\ud638 \uc2a4\ud399\ud2b8\ub7fc\uc758 \ucd5c\ub300 \uc8fc\ud30c\uc218\uc785\ub2c8\ub2e4. \ub2e4\uc2dc \ub9d0\ud574, \uc2e0\ud638\uc758 \ub514\uc9c0\ud138\ud654 \uc8fc\ud30c\uc218(ADC\uc758 \uc0d8\ud50c\ub9c1 \uc8fc\ud30c\uc218)\ub294 \uce21\uc815\ud558\ub824\ub294 \uc2e0\ud638\uc758 \ucd5c\ub300 \uc8fc\ud30c\uc218\ubcf4\ub2e4 \ucd5c\uc18c \ub450 \ubc30 \uc774\uc0c1\uc774\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

\ucf54\ud154\ub2c8\ucf54\ud504\uc758 \uc815\ub9ac\uc5d0 \ud544\uc694\ud55c \uac83\ubcf4\ub2e4 \ub0ae\uc740 \ube48\ub3c4\ub85c \uc0d8\ud50c\uc744 \ucc44\ucde8\ud558\uba74 \uc5b4\ub5bb\uac8c \ub420\uae4c\uc694?<\/p>\n

\uc774 \uacbd\uc6b0 \u201c\uc568\ub9ac\uc5b4\uc2f1<\/a>\uc774 \uacbd\uc6b0 \ub514\uc9c0\ud138\ud654 \ud6c4 \uace0\uc8fc\ud30c \uc2e0\ud638\uac00 \uc2e4\uc81c\ub85c \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294 \uc800\uc8fc\ud30c \uc2e0\ud638\ub85c \ubc14\ub00c\ub294 '\uc568\ub9ac\uc5b4\uc2f1' \ud6a8\uacfc(\uc2a4\ud2b8\ub85c\ubcf4\uc2a4\ucf54\ud53d \ud6a8\uacfc, \ubaa8\uc544\ub808 \ud6a8\uacfc\ub77c\uace0\ub3c4 \ud568)\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uadf8\ub9bc 11\uc5d0\uc11c \uace0\uc8fc\ud30c\uc758 \ube68\uac04\uc0c9 \uc0ac\uc778\ud30c\uac00 \uc2e4\uc81c \uc2e0\ud638\uc785\ub2c8\ub2e4. \uc800\uc8fc\ud30c\uc758 \ud30c\ub780\uc0c9 \uc0ac\uc778\ud30c\ub294 \uac00\uc0c1\uc758 \uc2e0\ud638\ub85c, \uc0d8\ud50c\ub9c1 \uc2dc\uac04 \ub3d9\uc548 \uace0\uc8fc\ud30c \uc2e0\ud638\uc758 \uc808\ubc18 \uc774\uc0c1\uc758 \uc8fc\uae30\ub97c \ud1b5\uacfc\ud560 \uc2dc\uac04\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 11. \ubd88\ucda9\ubd84\ud558\uac8c \ub192\uc740 \uc0d8\ud50c\ub9c1 \uc18d\ub3c4\uc5d0\uc11c \uc2a4\ud4e8\ub9ac\uc5b4\uc2a4 \uc800\uc8fc\ud30c \uc2e0\ud638\uc758 \ucd9c\ud604<\/p><\/div>\n

 <\/p>\n

\uc568\ub9ac\uc5b4\uc2f1 \ud604\uc0c1\uc744 \ubc29\uc9c0\ud558\uae30 \uc704\ud574, \ud2b9\uc218\ud55c \uc548\ud2f0\uc568\ub9ac\uc5b4\uc2f1 \ud544\ud130(\uc800\uc5ed \ud1b5\uacfc \ud544\ud130<\/a>)\uac00 ADC \uc55e\uc5d0 \ubc30\uce58\ub429\ub2c8\ub2e4. \uc774 \ud544\ud130\ub294 ADC \uc0d8\ud50c\ub9c1 \uc8fc\ud30c\uc218\uc758 \uc808\ubc18\ubcf4\ub2e4 \ub0ae\uc740 \uc8fc\ud30c\uc218\ub294 \ud1b5\uacfc\uc2dc\ud0a4\uace0, \uadf8\ubcf4\ub2e4 \ub192\uc740 \uc8fc\ud30c\uc218\ub294 \ucc28\ub2e8\ud569\ub2c8\ub2e4.<\/p>\n

\uc774\uc0b0 \uc0d8\ud50c\uc744 \ud1b5\ud574 \uc2e0\ud638 \uc2a4\ud399\ud2b8\ub7fc\uc744 \uacc4\uc0b0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc774\uc0b0 \ud478\ub9ac\uc5d0 \ubcc0\ud658 (DFT)<\/a> \uc774 \uc0ac\uc6a9\ub41c\ub2e4. \ub2e4\uc2dc \ud55c \ubc88, \uc774\uc0b0 \uc2e0\ud638\uc758 \uc2a4\ud399\ud2b8\ub7fc\uc740 \u201c\uc815\uc758\uc0c1\u201d \uc0d8\ud50c\ub9c1 \uc8fc\ud30c\uc218 Fd\uc758 \uc808\ubc18\ubcf4\ub2e4 \uc791\uc740 \uc8fc\ud30c\uc218 Fmax\ub85c \uc81c\ud55c\ub41c\ub2e4\ub294 \uc810\uc5d0 \uc720\uc758\ud574\uc57c \ud55c\ub2e4. \ub530\ub77c\uc11c \uc774\uc0b0 \uc2e0\ud638\uc758 \uc2a4\ud399\ud2b8\ub7fc\uc740 \ub2e4\uc74c\uc758 \ud569\uc73c\ub85c \ud45c\ud604\ub420 \uc218 \uc788\ub2e4. \uc720\ud55c <\/u>\uace0\uc870\ud30c\uc758 \uc218\ub294 \uc5f0\uc18d \uc2e0\ud638\uc758 \ud478\ub9ac\uc5d0 \uae09\uc218\uc758 \ubb34\ud55c \ud569\uacfc \ub2ec\ub9ac \uc2a4\ud399\ud2b8\ub7fc\uc774 \ubb34\uc81c\ud55c\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucf54\ud154\ub2c8\ucf54\ud504\uc758 \uc815\ub9ac\uc5d0 \ub530\ub974\uba74 \uace0\uc870\ud30c\uc758 \ucd5c\ub300 \uc8fc\ud30c\uc218\ub294 \ucd5c\uc18c 2\uac1c\uc758 \uc0d8\ud50c\uc744 \ucc28\uc9c0\ud560 \uc218 \uc788\uc5b4\uc57c \ud558\ubbc0\ub85c \uace0\uc870\ud30c \uc218\ub294 \ubd88\uc5f0\uc18d \uc2e0\ud638 \uc0d8\ud50c \uc218\uc758 \uc808\ubc18\uacfc \uac19\uc544\uc57c \ud569\ub2c8\ub2e4. \uc989, \uc0d8\ud50c\uc5d0 N\uac1c\uc758 \uc0d8\ud50c\uc774 \uc788\ub294 \uacbd\uc6b0 \uc2a4\ud399\ud2b8\ub7fc\uc758 \uace0\uc870\ud30c \uc218\ub294 N\/2\uac00 \ub429\ub2c8\ub2e4.<\/p>\n

\uc774\uc81c \uc774\uc0b0 \ud478\ub9ac\uc5d0 \ubcc0\ud658(DFT)\uc744 \uc0dd\uac01\ud574 \ubcf4\uc138\uc694.<\/p>\n

\"\uc774\uc0b0<\/p>\n

\ud478\ub9ac\uc5d0 \uc2dc\ub9ac\uc988\uc640 \ube44\uad50<\/p>\n

 <\/p>\n

\"\ud478\ub9ac\uc5d0<\/p>\n

\ubcf4\uc2dc\ub2e4\uc2dc\ud53c FFT\uc758 \uc2dc\uac04\uc774 \ubd88\uc5f0\uc18d\uc801\uc774\uace0 \uace0\uc870\ud30c\uc758 \uc218\uac00 \uc0d8\ud50c \uc218\uc758 \uc808\ubc18\uc778 N\/2\ub85c \uc81c\ud55c\ub41c\ub2e4\ub294 \uc810\uc744 \uc81c\uc678\ud558\uba74 \uc77c\uce58\ud569\ub2c8\ub2e4.<\/p>\n

DFT \uacf5\uc2dd\uc740 \ucc28\uc6d0\uc774 \uc5c6\ub294 \uc815\uc218 \ubcc0\uc218 k, s\ub85c \uc791\uc131\ub418\uba70, \uc5ec\uae30\uc11c k\ub294 \uc2e0\ud638 \uc0d8\ud50c \uc218, s\ub294 \uc2a4\ud399\ud2b8\ub7fc \uc131\ubd84 \uc218\uc785\ub2c8\ub2e4.
\n\uac12 s\ub294 \uc8fc\uae30 T(\uc2e0\ud638 \uce21\uc815 \uc9c0\uc18d \uc2dc\uac04) \ub2f9 \uc804\uccb4 \uace0\uc870\ud30c \uc9c4\ub3d9 \uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc774\uc0b0 \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc740 \uace0\uc870\ud30c\uc758 \uc9c4\ud3ed\uacfc \uc704\uc0c1\uc744 \uc218\uce58\uc801\uc73c\ub85c, \uc989 \"\ucef4\ud4e8\ud130\uc5d0\uc11c\" \ucc3e\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n

\uc704\uc5d0\uc11c \uc774\ubbf8 \ub9d0\ud588\ub4ef\uc774, \ube44\uc8fc\uae30 \ud568\uc218(\uc6b0\ub9ac\uc758 \uc2e0\ud638)\ub97c \ud478\ub9ac\uc5d0 \uae09\uc218\ub85c \ubd84\ud574\ud560 \ub54c \uacb0\uacfc \ud478\ub9ac\uc5d0 \uae09\uc218\ub294 \uc2e4\uc81c\ub85c \uc8fc\uae30 T\ub97c \uac16\ub294 \uc8fc\uae30 \ud568\uc218\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4(\uadf8\ub9bc 12).<\/p>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 12. \uc8fc\uae30 T0, \uc8fc\uae30 T>T0\uc758 \uc8fc\uae30 \ud568\uc218 f(x)<\/p><\/div>\n

 <\/p>\n

\uadf8\ub9bc 12\uc5d0\uc11c \ubcfc \uc218 \uc788\ub4ef\uc774, \ud568\uc218 f(x)\ub294 \uc8fc\uae30 T0\ub97c \uac16\ub294 \uc8fc\uae30 \ud568\uc218\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uce21\uc815 \uc0d8\ud50c \uae38\uc774 T\uac00 \ud568\uc218\uc758 \uc8fc\uae30 T0\uc640 \uac19\uc9c0 \uc54a\uae30 \ub54c\ubb38\uc5d0, \ud478\ub9ac\uc5d0 \uae09\uc218\ub85c \uad6c\ud55c \ud568\uc218\ub294 \uc810 T\uc5d0\uc11c \ubd88\uc5f0\uc18d\uc131\uc744 \ubcf4\uc785\ub2c8\ub2e4. \uadf8 \uacb0\uacfc, \uc774 \ud568\uc218\uc758 \uc2a4\ud399\ud2b8\ub7fc\uc5d0\ub294 \ub2e4\uc218\uc758 \uace0\uc8fc\ud30c \uace0\uc870\ud30c\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc774 \ud604\uc0c1\uc740 \uc2a4\ud399\ud2b8\ub7fc \ub204\uc124<\/a>, \uadf8\ub9ac\uace0 \uc2e4\uc81c\ub85c\ub294 \ub2e4\uc74c\ub9cc\ud07c \uc904\uc5b4\ub4ed\ub2c8\ub2e4. \uc708\ub3c4\uc789<\/a> \ubcc0\ud658 \uc804\uc758 \uc2e0\ud638. \uce21\uc815 \uc0d8\ud50c T\uc758 \uc9c0\uc18d \uc2dc\uac04\uc774 \ud568\uc218 T0\uc758 \uc8fc\uae30\uc640 \uc77c\uce58\ud55c\ub2e4\uba74, \ud478\ub9ac\uc5d0 \ubcc0\ud658 \ud6c4 \uc5bb\uc5b4\uc9c4 \uc2a4\ud399\ud2b8\ub7fc\uc5d0\ub294 \uc81c1 \uace0\uc870\ud30c(\uc0d8\ud50c\uc758 \uc9c0\uc18d \uc2dc\uac04\uacfc \uc8fc\uae30\uac00 \uac19\uc740 \uc0ac\uc778\ud30c)\ub9cc \ud3ec\ud568\ub420 \uac83\uc774\ub2e4. \uc774\ub294 \ud568\uc218 f(x)\uac00 \uc0ac\uc778\ud30c\uc774\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n

\uc989, DFT \ud504\ub85c\uadf8\ub7a8\uc740 \uc2e0\ud638\uac00 \"\uc0ac\uc778\ud30c\uc758 \ud55c \uc870\uac01\"\uc774\ub77c\ub294 \uac83\uc744 \"\uc54c\uc9c0 \ubabb\ud558\uc9c0\ub9cc\" \uc0ac\uc778\ud30c\uc758 \uac1c\ubcc4 \uc870\uac01\uc758 \ubd88\uc5f0\uc18d\uc131\uc73c\ub85c \uc778\ud574 \ubd88\uc5f0\uc18d\uc131\uc744 \uac16\ub294 \uc8fc\uae30 \ud568\uc218\ub97c \uae09\uc218\ub85c \ud45c\ud604\ud558\ub824\uace0 \uc2dc\ub3c4\ud569\ub2c8\ub2e4.<\/p>\n

\uacb0\uacfc\uc801\uc73c\ub85c \uc2a4\ud399\ud2b8\ub7fc\uc5d0 \uace0\uc870\ud30c\uac00 \ub098\ud0c0\ub098\uba70, \uc774 \ubd88\uc5f0\uc18d\uc131\uc744 \ud3ec\ud568\ud558\uc5ec \uc804\uccb4\uc801\uc73c\ub85c \ud568\uc218\uc758 \ubaa8\uc591\uc744 \ub098\ud0c0\ub0b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

\ub530\ub77c\uc11c \uc8fc\uae30\uac00 \ub2e4\ub978 \uc5ec\ub7ec \uc815\ud604\ud30c\uc758 \ud569\uc778 \uc2e0\ud638\uc758 \"\uc62c\ubc14\ub978\" \uc2a4\ud399\ud2b8\ub7fc\uc744 \uc5bb\uc73c\ub824\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uc870\uac74\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uae30\uac04\uc758 \uc815\uc218 \uc218 <\/u>\uc2e0\ud638\uc758 \uce21\uc815 \uae30\uac04\uc5d0 \uac01 \uc815\ud604\ud30c\uac00 \uc874\uc7ac\ud574\uc57c \ud569\ub2c8\ub2e4. \uc2e4\uc81c\ub85c \uc774 \uc870\uac74\uc740 \ucda9\ubd84\ud788 \uae34 \uc2e0\ud638 \uce21\uc815 \uae30\uac04\uc73c\ub85c \ucda9\uc871\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 13 \uae30\uc5b4\ubc15\uc2a4\uc758 \uc6b4\ub3d9\ud559\uc801 \uc624\ub958 \uc2e0\ud638 \ud568\uc218 \ubc0f \uc2a4\ud399\ud2b8\ub7fc \uc608\uc2dc<\/p><\/div>\n

 <\/p>\n

\uc9c0\uc18d \uc2dc\uac04\uc774 \uc9e7\uc73c\uba74 \uc0ac\uc9c4\uc774 \"\ub354 \ub098\ube60\uc838\" \ubcf4\uc785\ub2c8\ub2e4:<\/p>\n

 <\/p>\n

\"\uadf8\ub9bc

\uadf8\ub9bc 14 \ub85c\ud130 \uc9c4\ub3d9 \uae30\ub2a5 \ubc0f \uc2a4\ud399\ud2b8\ub7fc \uc608\uc2dc<\/p><\/div>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

\uc2e4\uc81c\ub85c\ub294 \ucef4\ud3ec\ub10c\ud2b8 \uc8fc\uae30\uc640 \uc2e0\ud638 \uc0d8\ud50c\ub9c1 \uae30\uac04\uc758 \ubd88\uc77c\uce58 \ub610\ub294 \ud30c\ud615\uc758 '\uc810\ud504\uc640 \ub04a\uae40'\uc73c\ub85c \uc778\ud55c '\uc2e4\uc81c \ucef4\ud3ec\ub10c\ud2b8'\uc640 '\uc544\ud2f0\ud329\ud2b8'\uac00 \uc5b4\ub514\uc5d0 \uc788\ub294\uc9c0 \ud30c\uc545\ud558\uae30 \uc5b4\ub824\uc6b8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubb3c\ub860 \"\uc2e4\uc81c \uad6c\uc131 \uc694\uc18c\"\uc640 \"\uc544\ud2f0\ud329\ud2b8\"\ub77c\ub294 \ub2e8\uc5b4\ub97c \ub530\uc634\ud45c\ub85c \ubb36\uc740 \ub370\ub294 \uc774\uc720\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc2a4\ud399\ud2b8\ub7fc \uadf8\ub798\ud504\uc5d0 \uace0\uc870\ud30c\uac00 \ub9ce\ub2e4\uace0 \ud574\uc11c \uc2e0\ud638\uac00 \uc2e4\uc81c\ub85c \uace0\uc870\ud30c\ub85c \uad6c\uc131\ub418\uc5b4 \uc788\ub2e4\ub294 \uc758\ubbf8\ub294 \uc544\ub2d9\ub2c8\ub2e4. \uc22b\uc790 7\uc774 \uc22b\uc790 3\uacfc 4\ub85c \"\uad6c\uc131\"\ub418\uc5b4 \uc788\ub2e4\uace0 \uc0dd\uac01\ud558\ub294 \uac83\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uc22b\uc790 7\uc740 3\uacfc 4\uc758 \ud569\uc73c\ub85c \uc0dd\uac01\ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \ub9de\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc6b0\ub9ac\uc758 \uc2e0\ud638... \ub610\ub294 \uc624\ud788\ub824 \"\uc6b0\ub9ac\uc758 \uc2e0\ud638\"\uac00 \uc544\ub2c8\ub77c \uc2e0\ud638(\uc0d8\ud50c)\ub97c \ubc18\ubcf5\ud558\uc5ec \uad6c\uc131\ub41c \uc8fc\uae30 \ud568\uc218\ub294 \ud2b9\uc815 \uc9c4\ud3ed\uacfc \uc704\uc0c1\uc744 \uac00\uc9c4 \uace0\uc870\ud30c(\uc0ac\uc778\ud30c)\uc758 \ud569\uc73c\ub85c \ub098\ud0c0\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc2e4\ubb34\uc5d0 \uc911\uc694\ud55c \ub9ce\uc740 \uacbd\uc6b0(\uc704 \uadf8\ub9bc \ucc38\uc870) \uc2a4\ud399\ud2b8\ub7fc\uc5d0\uc11c \uc5bb\uc740 \uace0\uc870\ud30c\ub97c \uc8fc\uae30\uc801 \ud2b9\uc131\uc744 \uac16\uace0 \uc2e0\ud638\uc758 \ud615\ud0dc\uc5d0 \ud06c\uac8c \uae30\uc5ec\ud558\ub294 \uc2e4\uc81c \ud504\ub85c\uc138\uc2a4\uc640 \uc5f0\uad00\uc2dc\ud0a4\ub294 \uac83\uc774 \uc2e4\uc81c\ub85c \uac00\ub2a5\ud569\ub2c8\ub2e4.<\/p>\n

\uc77c\ubd80 \uacb0\uacfc<\/h2>\n

1. ADC\ub85c \ub514\uc9c0\ud138\ud654\ub41c T\ucd08 \uc9c0\uc18d \uc2dc\uac04\uc758 \uc2e4\uc81c \uce21\uc815 \uc2e0\ud638, \uc989 \uc774\uc0b0 \uc0d8\ud50c \uc138\ud2b8(N\uac1c)\ub85c \ud45c\ud604\ub418\ub294 \uc2e0\ud638\ub294 \uace0\uc870\ud30c \uc138\ud2b8(N\/2\uac1c)\ub85c \ud45c\ud604\ub418\ub294 \uc774\uc0b0 \ube44\uc8fc\uae30\uc801 \uc2a4\ud399\ud2b8\ub7fc\uc744 \uac16\uc2b5\ub2c8\ub2e4.<\/p>\n

2. \uc2e0\ud638\ub294 \uc2e4\uc218 \uac12\ub4e4\uc758 \uc9d1\ud569\uc73c\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4. \uadf8 DFT \uc2a4\ud399\ud2b8\ub7fc\uc740 \ucf24\ub808 \ub300\uce6d\uc744 \uac16\ub294 \ubcf5\uc18c \uacc4\uc218\ub4e4\uc758 \uc9d1\ud569\uc774\uba70, \uc5ec\uae30\uc11c \uc591\uc758 \uc8fc\ud30c\uc218\uc5d0\uc11c\uc758 \uc2e4\uc218 \ube44\uc74c\uc218 \uc9c4\ud3ed(\ubc0f \uc704\uc0c1) \uc9d1\ud569\uc778 \uc9c4\ud3ed \uc2a4\ud399\ud2b8\ub7fc\uc774 \uc5bb\uc5b4\uc9d1\ub2c8\ub2e4. \uc2e4\ubb34\uc5d0\uc11c\ub294 \ubc14\ub85c \uc774 \ub2e8\uce21 \uc9c4\ud3ed \uc2a4\ud399\ud2b8\ub7fc\uc744 \uadf8\ub9bd\ub2c8\ub2e4. \uc74c\uc758 \uc8fc\ud30c\uc218\ub97c \ud3ec\ud568\ud55c \uc591\uce21 \ubcf5\uc18c \ud615\ud0dc\uc640 \ub2e8\uce21 \uc9c4\ud3ed\/\uc704\uc0c1 \ud615\ud0dc\ub294 \ub3d9\uc77c\ud55c \uc2a4\ud399\ud2b8\ub7fc\uc758 \ub3d9\ub4f1\ud55c \ud45c\ud604\uc774\uba70, \uc2e0\ud638 \ubd84\uc11d\uc5d0\uc11c\ub294 \ubcf4\ud1b5 \ub2e8\uce21 \uc9c4\ud3ed \uc2a4\ud399\ud2b8\ub7fc\uc73c\ub85c \uc791\uc5c5\ud558\ub294 \uac83\uc774 \ub354 \ud3b8\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n

3. T \uc2dc\uc810\uc5d0 \uce21\uc815\ub41c \uc2e0\ud638\ub294 T \uc2dc\uc810\uc5d0\ub9cc \uacb0\uc815\ub418\uba70, \uc2e0\ud638 \uce21\uc815\uc744 \uc2dc\uc791\ud558\uae30 \uc804\uc5d0 \uc5b4\ub5a4 \uc77c\uc774 \uc77c\uc5b4\ub0ac\uace0 \uadf8 \uc774\ud6c4\uc5d0 \uc5b4\ub5a4 \uc77c\uc774 \uc77c\uc5b4\ub0a0\uc9c0\ub294 \uacfc\ud559\uc801\uc73c\ub85c \uc54c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uc6b0\ub9ac\uc758 \uacbd\uc6b0\uc5d0\ub294 \ud765\ubbf8\ub86d\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc2dc\uac04 \uc81c\ud55c \uc2e0\ud638\uc758 FFT\ub294 \ud2b9\uc815 \uc870\uac74\uc5d0\uc11c \uad6c\uc131 \uc694\uc18c\uc758 \uc9c4\ud3ed\uacfc \uc8fc\ud30c\uc218\ub97c \uacc4\uc0b0\ud560 \uc218 \uc788\ub2e4\ub294 \uc758\ubbf8\uc5d0\uc11c \"\uc2e4\uc81c\"\uc2a4\ud399\ud2b8\ub7fc\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Application of the Fourier Transform to the Analysis of Vibration Signals Andrei Shelkovenko. One of the developers and founder of Vibromera. The translation of the article may contain inaccuracies. Fourier transform and signal spectrum In many cases the task of obtaining (calculating) the spectrum of a signal is as follows. […]<\/p>\n","protected":false},"author":2,"featured_media":2161,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ai_generated_summary":"","footnotes":""},"categories":[4],"tags":[],"class_list":["post-2138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-example"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/posts\/2138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/comments?post=2138"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/posts\/2138\/revisions"}],"predecessor-version":[{"id":102137,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/posts\/2138\/revisions\/102137"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/media\/2161"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/media?parent=2138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/categories?post=2138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ko\/wp-json\/wp\/v2\/tags?post=2138"}],"curies":[{"name":"\uc6cc\ub4dc\ud504\ub808\uc2a4","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}