Feature-based Multiresolution Modeling
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ÃÖ±Ù ÀÚµ¿Â÷¸¦ ºñ·ÔÇÑ Á¦Ç° ¼³°è¿¡ 3 Â÷¿ø Ư¡Çü»ó ±â¹Ý CAD ½Ã½ºÅÛÀÌ ³Î¸® »ç¿ëµÇ°í ÀÖ´Ù . ±×·±µ¥ ¼³°è ´Ü°è¿¡¼ ¸¸µé¾îÁø Á¦Ç° ¸ðµ¨ÀÌÇؼ®À» Æ÷ÇÔÇÑ ¿©·¯ ÀÀ¿ë ºÐ¾ß¿¡ »ç¿ëµÉ ¶§´Â »ó¼¼ Çü»ó ¸ðµ¨º¸´Ù ´Ù¾çÇÑ »ó¼¼ ¼öÁØ (LOD) À¸·Î ´Ü¼øÈ µÇ°Å³ª Ãà¾àµÈ ¸ðµ¨ÀÌ ÈξÀ ´õ ¹Ù¶÷Á÷ÇÏ°í À¯¿ëÇÑ °æ¿ì°¡ ¸¹ÀÌ ÀÖ´Ù . ÀÌ¿Í °°ÀÌ ÇϳªÀÇ Çü»ó ¸ðµ¨¿¡ ´ëÇÏ¿© ´Ù¾çÇÑ LOD ¿¡ ´ëÀÀµÇ´Â °£·«ÈµÈ Çü»ó ¸ðµ¨À» Á¦°øÇÏ´Â ±â¹ýÀ» ´ÙÁßÇØ»óµµ ¸ðµ¨¸µ (multi-resolution modeling) ±â¹ýÀ̶ó°í ÇÏ¸ç º» ¿¬±¸¿¡¼´Â ±âÁ¸ÀÇ ¹æ½Ä°ú ´Þ¸® Ư¡ Çü»óÀ» ´ÜÀ§·Î °£·«È½ÃÅ°´Â»õ·Î¿î ÇüÅÂÀÇ ´ÙÁßÇØ»óµµ ¸ðµ¨¸µ ¹æ¹ýÀ» °³¹ßÇÏ¿´´Ù . ÀÌ·¯ÇÑ Æ¯Â¡Çü»ó±â¹Ý ´ÙÁßÇØ»óµµ ¸ðµ¨¸µÀÇ ´ëÇ¥ÀûÀÎ ÀÀ¿ë ºÐ¾ß´Â ¿£Áö´Ï¾î¸µ Çؼ® ³×Æ®¿÷±â¹Ý ºÐ»ê Çù¾÷ ¼³°è , ±×¸®°í °¡»ó ÇÁ·ÎÅäŸÀÌÇÎ ¹× »ý»ê ºÐ¾ßÀÌ´Ù . ±×·±µ¥ ÀϹÝÀûÀ¸·Î ºÒ¸®¾È ÇÕÁýÇÕ°ú Â÷ÁýÇÕ ¿¬»ê»çÀÌ¿¡´Â ±³È¯¹ýÄ¢ÀÌ ¼º¸³ÇÏÁö ¾Ê±â ¶§¹®¿¡ ¸¸ÀÏ Æ¯Â¡Çü»óµéÀÌ LOD ÆÇ´Ü ±âÁØ¿¡ µû¶ó Àç¹è¿µÇ¸é ±× ÃÖÁ¾ °á°ú Çü»óÀº ¿ø·¡ÀÇ ºÎÇ° Çü»ó°ú ´Þ¶óÁö°ÔµÈ´Ù . µû¶ó¼ Ư¡Çü»óÀÌ Àç¹è¿µÇ´õ¶óµµ ¿ø·¡¿Í µ¿ÀÏÇÑ ºÎÇ° Çü»óÀÌ º¸ÀåµÇ°í , Áß°£ ´Ü°èÀÇ LOD ¸ðµ¨µéµµ ÇÕ¸®ÀûÀÎ Çü»óÀ» °®´Â¾Ë°í¸®ÁòÀÇ °³¹ßÀÌ ÇÊ¿äÇÏ´Ù . ÀÌ ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇÏ¿© º» ¿¬±¸¿¡¼´Â Ư¡Çü»óÀÇ À¯È¿¿µ¿ª (effective zone of feature) À̶ó´Â »õ·Î¿î°³³äÀ» µµÀÔÇÏ¿´´Ù . Ư¡Çü»ó À¯È¿¿µ¿ªÀ̶õ Àç¹è¿µÈ Ư¡Çü»ó Æ®¸®¿¡¼ °¢ Ư¡Çü»óÀÇ ¿ø·¡ ±âº»ÀÔü¿¡ ´ëÇØ ½ÇÁ¦·Î »ç¿ëµÉ ºÎºÐ¿µ¿ªÀ¸·Î¼ ÀÌ °³³äÀ» µµÀÔÇÔÀ¸·Î½á Ư¡Çü»óÀÌ ÀÓÀÇ·Î Àç¹è¿µÈ´Ù ÇÏ´õ¶óµµ ¾ðÁ¦³ª ¿ø·¡ ºÎÇ° Çü»ó°ú µ¿ÀÏÇÑ ÃÖÁ¾ °á°ú Çü»óÀ» ´ãº¸ÇÒ ¼öÀÖ°Ô µÇ¾úÀ¸¸ç ±×¿¡ µû¶ó ´Ù¾çÇÑ ÀÀ¿ë ºÐ¾ß¿¡ ¸Â´Â °¢Á¾ LOD ÆÇ´Ü ±âÁص鵵 ¼ö¿ë °¡´ÉÇÏ°Ô µÇ¾ú´Ù . ¶ÇÇÑ , Ư¡Çü»óÀÇ À¯È¿¿µ¿ªÀº ¼öÇÐÀûÀ¸·Î Á¤ÀǵǴ °ÍÀ̱⠶§¹®¿¡ ¸ðµ¨ÀÇ ÀڷᱸÁ¶¿Í´Â µ¶¸³ÀûÀ̸ç , µû¶ó¼ À¯È¿¿µ¿ª¿¡ ¹ÙÅÁÀ» µÐ ´ÙÁßÇØ»óµµ ¸ðµ¨¸µ ¾Ë°í¸®ÁòÀº ºñ´Üºñ´Ù¾çü ÀڷᱸÁ¶»Ó¸¸ ¾Æ´Ï¶ó ÀüÅëÀûÀÎ ¼Ö¸®µå ÀڷᱸÁ¶ »ó¿¡¼µµ ±¸ÇöÀÌ °¡´ÉÇÏ´Ù .
References
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Sang Hun Lee, Kunwoo Lee, "Simultaneous and Incremental Feature-based multiresolution modeling with Feature Operation in Part Design," Computer-Aided Design, Vol. 44, No. 5, pp. 457-483, 2012
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Sang Hun Lee, ¡°Feature-Based Multiresolution Modeling of Solids¡±, ACM Transactions on Graphics, Vol.24, No.4, pp.1417-1441, 2005.10
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Sang Hun Lee, Kunwoo Lee, ¡°Feature-based multiresolution techniques for product design¡±, Journal of Zhejiang University Science A, Vol.7, No.9, pp.1535-1543, 2006.9
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Sang Hun Lee, Kunwoo Lee, Seongchan Kim, ¡°History-Based Selective Boolean Operations for Feature-Based Multi-resolution Modeling¡±, Lecture Note in Computer Science, Vol.3980, pp.459-468, 2006.5
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Sang Hun Lee , Kyu-Yeul Lee, Yoonwhan Woo, Kang-Soo Lee, ¡°Feature-Based Multi-Resolution Modeling of Solids Using History-Based Boolean Operations-Part I: Theory of History-Based Boolean Operations¡±, Journal of Mechanical Science and Technology, Vol.19, No.2, pp.549-557, 2005.2
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Sang Hun Lee, Kyu-Yeul Lee, Yoonwhan Woo, Kang-Soo Lee, ¡°Feature-Based Multi-Resolution Modeling of Solids Using History-Based Boolean Operations-Part II: Implementation Using a Non-Manifold Modeling System¡±, Journal of Mechanical Science and Technology, Vol.19, No.2, pp.558-566, 2005.2
Feature-based Multi-abstraction Modeling and CAD/CAE Integration
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Ãֱ٠Ư¡Çü»ó±â¹Ý 3 Â÷¿ø CAD ½Ã½ºÅÛÀÌ Á¦Ç° ¼³°è¿¡ ³Î¸® È®»êµÇ¾î °¡°í ÀÖ´Â µ¿½Ã¿¡ CAE ½Ã½ºÅÛÀ» »ç¿ëÇÑ Çؼ® ÀÛ¾÷ÀÌ Á¦Ç° ¼³°èÀÇ ±âº»ÀûÀÎ °úÁ¤À¸·Î ÀÚ¸®¸¦ Àâ¾Æ°¡°í ÀÖ´Ù . µû¶ó¼ È¿À²ÀûÀÎ Á¦Ç° ¼³°è¸¦ À§Çؼ´Â CAD ¿Í CAE °¡ º¸´Ù ±ä¹ÐÈ÷ ÅëÇյǴ °ÍÀÌ ÇʼöÀûÀÌ´Ù±×·¯³ª CAD ½Ã½ºÅÛ¿¡ ÀÇÇØ »ý¼ºµÈ »ó¼¼ÇÑ ¼Ö¸®µå ¸ðµ¨ ´ë½Å¿¡ º¸Åë Ãà¾àµÈ Çü»ó ¸ðµ¨À» ¿ä±¸ÇÏ´Â °æ¿ì°¡ Á¾Á¾ ¹ß»ýÇϸç , ÀÌ °æ¿ì Çؼ®¸ðµ¨À» ¾ò±â À§Çؼ´Â »ó¼¼ Á¦°Å (detail removal) ¿Í Â÷¿ø °¨¼Ò (dimensional reduction) À» Æ÷ÇÔÇÑ ÀûÀýÇÑ ÀÌ»óÈ (idealization) °úÁ¤ÀÌÇÊ¿äÇÏ´Ù . ÀÌ ÀÌ»óÈ °úÁ¤Àº ¸¹Àº ½Ã°£À» ¿äÇÏ´Â ÀÛ¾÷À¸·Î¼ CAD ¿Í CAE ÅëÇÕÀÇ °¡Àå Å« °É¸²µ¹ÀÌ´Ù . ÀÌ·¯ÇÑ ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇÏ¿© º»¿¬±¸¿¡¼´Â ÅëÇÕ CAD/CAE ¹æ½Ä (CAD/CAE-integrated approach) À̶ó°í ºÒ¸®´Â »õ·Î¿î ¹æ¹ýÀ» °³¹ßÇÏ¿´´Ù . ÀÌ ¹æ¹ý¿¡¼´Â ¸Å Ư¡Çü»ó¸ðµ¨¸µ ÀÛ¾÷ÀÌ ¼öÇàµÉ ¶§¸¶´Ù ¼³°è¿Í Çؼ®À» À§ÇÑ ¼·Î ´Ù¸¥ À¯ÇüÀÇ ±âÇÏÇÐÀûÀÎ ¸ðµ¨µéÀÌ µ¿½Ã¿¡ »ý¼ºµÈ ÈÄ ¹Ù·Î º´ÇÕü (merged set) ¶óºÒ¸®´Â ºñ´Ù¾çü ºÎÇ° ¸¶½ºÅÍ ¸ðµ¨ (part master model) ¿¡ º´Çյȴ٠. ÀÌ ¸¶½ºÅÍ ¸ðµ¨·ÎºÎÅÍ ´Ù¾çÇÑ LOD ¿¡ ´ëÇÑ ¼Ö¸®µå ¸ðµ¨µéÀÌ Áï°¢ ÃßÃâµÉ ¼ö ÀÖÀ¸¸ç , ¶ÇÇÑ , ¾î¶² LOD ¿¡ ´ëÇÏ¿© ´Ù¾çÇÑ ¼öÁØÀÇ LOA ¿¡ ´ëÇÑ ºñ´Ù¾çü Ãà¾à ¸ðµ¨µéµµ ÀÌ ¸¶½ºÅÍ ¸ðµ¨·ÎºÎÅÍ ½Å¼ÓÈ÷ ÃßÃâµÇ¾îCAE ½Ã½ºÅÛ¿¡ Àü´ÞµÉ ¼ö ÀÖ´Ù . ¼³°è º¯°æ½Ã ÀÌ ¸¶½ºÅÍ ¸ðµ¨À» ¼öÁ¤ÇÏ´Â ¹æ½ÄÀ» äÅÃÇÔÀ¸·Î½á ¼³°è¿Í Çؼ® ¸ðµ¨µéÀÌ µ¿½ÃÀûÀÌ°í ÀÏ°ü¼ºÀÖ°Ô ¼öÁ¤µÇ´Â È¿°ú¸¦ °¡Á®¿Ã ¼ö ÀÖ´Ù . º» ¿¬±¸ °á°ú¸¦ Àû¿ëÇÔÀ¸·Î½á º¸´Ù ±ä¹ÐÇÑ CAD/CAE ÅëÇÕÀ» ÀÌ·ê ¼ö ÀÖÀ» °ÍÀ¸·Î ±â´ëµÈ´Ù .
References
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Sang Hun Lee, ¡°A CAD-CAE integration approach using feature-based multi-resolution and multi-abstraction modelling techniques¡±, Computer-Aided Design, Vol.37, No.9, pp.941-955, 2005.8
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Sang Hun Lee, ¡°Feature-based Non-manifold Modeling System to Integrate Design and Analysis of Injection Molding Products¡±, Journal of Mechanical Science and Technology. Vol.23, No.5, 2009.
Projects
- Ư¡Çü»ó±â¹Ý ´ÙÁßÇØ»óµµ ¸ðµ¨¸µ ±â¼ú°³¹ß ( ÇмúÁøÈïÀç´Ü , 2006~2007)
- ÇÇÃÄ ¸ÊÇÎ ±â¹ýÀ» ÀÌ¿ëÇÑ 2 Â÷¿ø ¼±¹Ú ¸ðµ¨ÀÇ 3 Â÷¿ø µðÁöÅÐ ¸ðµ¨ ÀÚµ¿ º¯È¯ ±â¼ú ( Çѱ¹°úÇÐÀç´Ü , 2002~2005)
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