{"id":8847,"date":"2026-04-15T17:30:53","date_gmt":"2026-04-15T08:30:53","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=8847"},"modified":"2026-04-15T17:31:54","modified_gmt":"2026-04-15T08:31:54","slug":"complex-number%eb%a1%9c-%eb%b3%b4%eb%8a%94-2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/complex-number%eb%a1%9c-%eb%b3%b4%eb%8a%94-2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c\/","title":{"rendered":"complex number\ub85c \ubcf4\ub294 2\ucc28 \uc2dc\uc2a4\ud15c"},"content":{"rendered":"\n<p>\ucd9c\ucc98\ub97c \uc815\ud655\ud788 \ud2b9\uc815\ud558\uae30\ub294 \uc5b4\ub835\uc9c0\ub9cc, \uacfc\uac70 \ud3ec\ud56d\uacf5\ub300 \uc774\uc2b9\ucca0 \uad50\uc218 \uac15\uc758\uc5d0\uc11c\ub294 2\ucc28 \uc2dc\uc2a4\ud15c\uc758 \uac70\ub3d9\uc744 <strong>\uc624\uc77c\ub7ec \uacf5\uc2dd\uc744 \ud65c\uc6a9\ud55c \ud68c\uc804 \uc6b4\ub3d9\uc758 \uad00\uc810<\/strong>\uc5d0\uc11c \ub9e4\uc6b0 \uba85\ucf8c\ud558\uac8c \uc815\ub9ac\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2\ucc28 \uc2dc\uc2a4\ud15c\uacfc \uc624\uc77c\ub7ec \uacf5\uc2dd\uc758 \uacb0\ud569: \uc6b4\ub3d9\uc758 \uc7ac\ud574\uc11d<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>2\ucc28 \uc2dc\uc2a4\ud15c\uc758 \ud2b9\uc131 \ubc29\uc815\uc2dd(Characteristic Equation)\uc744 \ud480\uba74 \ubcf5\uc18c\uadfc $s = \\sigma \\pm j\\omega_d$\uac00 \ub3c4\ucd9c\ub429\ub2c8\ub2e4. \uc774\ub54c <strong>\uc624\uc77c\ub7ec \uacf5\uc2dd<\/strong> $e^{j\\theta} = \\cos\\theta + j\\sin\\theta$\uc744 \uc801\uc6a9\ud558\uba74, \uc2dc\uc2a4\ud15c\uc758 \uc751\ub2f5\uc744 \ub2e8\uc21c\ud55c &#8216;\uc218\uce58&#8217;\uac00 \uc544\ub2cc &#8216;\uae30\ud558\ud559\uc801 \uc6b4\ub3d9&#8217;\uc73c\ub85c \uc774\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2460 \ubcf5\uc18c\ud3c9\uba74\uc5d0\uc11c\uc758 \ud68c\uc804 \ubca1\ud130<\/h4>\n\n\n\n<p>\uc624\uc77c\ub7ec \uacf5\uc2dd\uc5d0 \uc758\ud574 $e^{(\\sigma + j\\omega_d)t}$\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ubd84\ud574\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$e^{\\sigma t}$ (\uac10\uc1e0 \uc131\ubd84):<\/strong> \uc2dc\uac04\uc5d0 \ub530\ub77c \uc9c4\ud3ed\uc774 \uc904\uc5b4\ub4dc\ub294 \uc815\ub3c4\ub97c \uacb0\uc815\ud569\ub2c8\ub2e4. (\uc2e4\uc218\ubd80)<\/li>\n\n\n\n<li><strong>$e^{j\\omega_d t}$ (\ud68c\uc804 \uc131\ubd84):<\/strong> \ubcf5\uc18c\ud3c9\uba74\uc0c1\uc5d0\uc11c \uc77c\uc815\ud55c \uc18d\ub3c4\ub85c \ud68c\uc804\ud558\ub294 \uc6b4\ub3d9\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. (\ud5c8\uc218\ubd80)<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u2461 \uc9c4\ub3d9\uc744 &#8216;\ud68c\uc804\uc758 \ud22c\uc601&#8217;\uc73c\ub85c \uc774\ud574<\/h4>\n\n\n\n<p>2\ucc28 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \ub098\ud0c0\ub098\ub294 **\uc0ac\uc778\ud30c \ud615\ud0dc\uc758 \uc9c4\ub3d9(Oscillation)**\uc740 \uc0ac\uc2e4 \ubcf5\uc18c\ud3c9\uba74\uc5d0\uc11c \ud68c\uc804\ud558\uace0 \uc788\ub294 \ubca1\ud130\ub97c \uc2e4\ucd95(Real axis) \uc704\ub85c **\ud22c\uc601(Projection)**\ud55c \uacb0\uacfc\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2462 \uc81c\ub3d9\ube44($\\zeta$)\uc5d0 \ub530\ub978 \uc6b4\ub3d9\uc758 \ubcc0\ud654<\/h4>\n\n\n\n<p>\uc624\uc77c\ub7ec \uacf5\uc2dd\uc758 \uad00\uc810\uc5d0\uc11c \ubcf4\uba74 \uc2dc\uc2a4\ud15c\uc758 \uc548\uc815\uc131\uacfc \uc751\ub2f5 \uc18d\ub3c4\ub294 \ubcf5\uc18c\ud3c9\uba74\uc0c1 \uadfc\uc758 \uc704\uce58\uc5d0 \ub530\ub77c \uacb0\uc815\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\ube44\uc81c\ub3d9 (Undamped):<\/strong> \uc2e4\uc218\ubd80\uac00 0\uc774 \ub418\uc5b4 \ud5c8\uc218\ucd95 \uc704\uc5d0\uc11c \uc21c\uc218\ud55c \uc6d0\uc6b4\ub3d9\uc744 \ud558\uba70, \ub05d\uc5c6\uc774 \uc9c4\ub3d9\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ubbf8\ub2ec \uc81c\ub3d9 (Underdamped):<\/strong> \uc2e4\uc218\ubd80\uac00 \uc74c\uc218\uc774\ubbc0\ub85c, \ud68c\uc804\ud558\uba74\uc11c \uc911\uc2ec(\uc6d0\uc810)\uc73c\ub85c \uc218\ub834\ud558\ub294 <strong>\ub098\uc120\ud615(Spiral) \uc6b4\ub3d9<\/strong>\uc744 \ubcf4\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. \uacb0\ub860: \uc774 \uad00\uc810\uc758 &#8216;\ub300\ubc15&#8217; \ud3ec\uc778\ud2b8<\/h3>\n\n\n\n<p>\ubcf4\ud1b5 2\ucc28 \uc2dc\uc2a4\ud15c\uc744 \ub2e8\uc21c\ud788 \ubbf8\ubd84\ubc29\uc815\uc2dd\uc758 \ud574\ub85c\ub9cc \uc811\uadfc\ud558\uba74 \uc218\uc2dd \uacc4\uc0b0\uc5d0 \ub9e4\ubab0\ub418\uae30 \uc27d\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ud3ec\ud56d\uacf5\ub300 \uac15\uc758 \ubc29\uc2dd\ucc98\ub7fc <strong>\uc624\uc77c\ub7ec \uacf5\uc2dd\uc744 \ud1b5\ud574 \ubcf5\uc18c\ud3c9\uba74\uc0c1\uc758 \ud68c\uc804 \uc6b4\ub3d9<\/strong>\uc73c\ub85c \ud574\uc11d\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \ud1b5\ucc30\uc744 \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>&#8220;2\ucc28 \uc2dc\uc2a4\ud15c\uc758 \uc751\ub2f5\uc740 \ubcf5\uc18c\ud3c9\uba74 \uc704\uc5d0\uc11c <strong>\ub098\uc120\ud615\uc73c\ub85c \uc218\ub834\ud558\ub294 \ubca1\ud130\uc758 \uadf8\ub9bc\uc790<\/strong>\ub97c \ubcf4\ub294 \uac83\uacfc \uac19\ub2e4.&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p>\uc774\ub7ec\ud55c \uae30\ud558\ud559\uc801 \uc811\uadfc\uc740 \ud5a5\ud6c4 \uc81c\uc5b4 \uacf5\ud559\uc5d0\uc11c \uc8fc\ud30c\uc218 \uc751\ub2f5\uc774\ub098 \ubcf5\uc18c \ud3c9\uba74\uc0c1\uc758 \uadfc\uada4\uc801(Root Locus)\uc744 \uc774\ud574\ud560 \ub54c \ub9e4\uc6b0 \uac15\ub825\ud55c \uc9c1\uad00\ub825\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"929\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-11.png\" alt=\"\" class=\"wp-image-8848\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-11.png 929w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-11-768x1058.png 768w\" sizes=\"auto, (max-width: 929px) 100vw, 929px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"906\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-12.png\" alt=\"\" class=\"wp-image-8849\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-12.png 906w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-12-768x1085.png 768w\" sizes=\"auto, (max-width: 906px) 100vw, 906px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"922\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-13.png\" alt=\"\" class=\"wp-image-8850\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-13.png 922w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-13-768x1066.png 768w\" sizes=\"auto, (max-width: 922px) 100vw, 922px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"902\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-14.png\" alt=\"\" class=\"wp-image-8851\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-14.png 902w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2026\/04\/image-14-768x1090.png 768w\" sizes=\"auto, (max-width: 902px) 100vw, 902px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"rgC9afUTr5\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%b5%ec%a7%84-%ec%a3%bc%ed%8c%8c%ec%88%98-%ec%9c%a0%eb%8f%84\/\">2\ucc28 \uc2dc\uc2a4\ud15c \uacf5\uc9c4 \uc8fc\ud30c\uc218 \uc720\ub3c4<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;2\ucc28 \uc2dc\uc2a4\ud15c \uacf5\uc9c4 \uc8fc\ud30c\uc218 \uc720\ub3c4&#8221; &#8212; now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%b5%ec%a7%84-%ec%a3%bc%ed%8c%8c%ec%88%98-%ec%9c%a0%eb%8f%84\/embed\/#?secret=kh4AJyfvVm#?secret=rgC9afUTr5\" data-secret=\"rgC9afUTr5\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"pkfk0Q34i0\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%bc%eb%8f%84-%ec%9d%91%eb%8b%b5\/\">2\ucc28 \uc2dc\uc2a4\ud15c \uacfc\ub3c4 \uc751\ub2f5<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;2\ucc28 \uc2dc\uc2a4\ud15c \uacfc\ub3c4 \uc751\ub2f5&#8221; &#8212; now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%bc%eb%8f%84-%ec%9d%91%eb%8b%b5\/embed\/#?secret=55xwibuhgX#?secret=pkfk0Q34i0\" data-secret=\"pkfk0Q34i0\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"rgC9afUTr5\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%b5%ec%a7%84-%ec%a3%bc%ed%8c%8c%ec%88%98-%ec%9c%a0%eb%8f%84\/\">2\ucc28 \uc2dc\uc2a4\ud15c \uacf5\uc9c4 \uc8fc\ud30c\uc218 \uc720\ub3c4<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;2\ucc28 \uc2dc\uc2a4\ud15c \uacf5\uc9c4 \uc8fc\ud30c\uc218 \uc720\ub3c4&#8221; &#8212; now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c-%ea%b3%b5%ec%a7%84-%ec%a3%bc%ed%8c%8c%ec%88%98-%ec%9c%a0%eb%8f%84\/embed\/#?secret=kh4AJyfvVm#?secret=rgC9afUTr5\" data-secret=\"rgC9afUTr5\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"SpN9Z34BN2\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c%ec%9d%98-time-specification\/\">2\ucc28 \uc2dc\uc2a4\ud15c\uc758 time specification<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;2\ucc28 \uc2dc\uc2a4\ud15c\uc758 time specification&#8221; &#8212; now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/2%ec%b0%a8-%ec%8b%9c%ec%8a%a4%ed%85%9c%ec%9d%98-time-specification\/embed\/#?secret=I70zDUv2RA#?secret=SpN9Z34BN2\" data-secret=\"SpN9Z34BN2\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\ucd9c\ucc98\ub97c \uc815\ud655\ud788 \ud2b9\uc815\ud558\uae30\ub294 \uc5b4\ub835\uc9c0\ub9cc, \uacfc\uac70 \ud3ec\ud56d\uacf5\ub300 \uc774\uc2b9\ucca0 \uad50\uc218 \uac15\uc758\uc5d0\uc11c\ub294 2\ucc28 \uc2dc\uc2a4\ud15c\uc758 \uac70\ub3d9\uc744 \uc624\uc77c\ub7ec \uacf5\uc2dd\uc744 \ud65c\uc6a9\ud55c \ud68c\uc804 \uc6b4\ub3d9\uc758 \uad00\uc810\uc5d0\uc11c \ub9e4\uc6b0 \uba85\ucf8c\ud558\uac8c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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