서지주요정보
NC 데이터 양을 줄이기 위한 유연한 바이아크 근사법 = Flexible biarc curve fitting for NC data reduction
서명 / 저자 NC 데이터 양을 줄이기 위한 유연한 바이아크 근사법 = Flexible biarc curve fitting for NC data reduction / 김성철.
저자명 김성철 ; Kim, Sung-Chul
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008670

소장위치/청구기호

학술문화관(문화관) 보존서고

MIE 98004

SMS전송

도서상태

이용가능

대출가능

반납예정일

등록번호

9004411

소장위치/청구기호

서울 학위논문 서가

MIE 98004 c. 2

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In cutter-path genertation for sculptured surface machining (SSM), cutter-location (CL) points are usually generated as a sequence of "planar" points defined on horizontal planes (during contouring) or vertical planes (during area scanning) which are parallel with the xz-plane or yz-plane. A simple method of obtaining NC-codes for SSM is to connect adjacent CL-points with a line segment. The main disadvantages of this linear interpolation method are 1) excessive NC-file sizes with too small line segments and 2) tangential discontinuity between linear movements (G01) commands, both of which affect the quality of surface finish as well as machining productivity. Thus, it is a recent trend that circular interpolations (and NURBS interpolation), which are free from the above drawbacks, are widely used in SSM. Presented in the thesis is a biarc curve fitting method for circular interpolation. In the proposed biarc-fitting method which is termed the "flexible biarc-fitting method", the input point sequence is first preprocessed so that "break points" (or tangent discontinuity points), linear regions and circular regions are identified. And then a search rule is applied to each "freeform" curve segment so that minimum-deviation biarcs can be fitted. For this purpose, a handle or decision variable defining the shape of a biarc is introduced. The effectiveness of the proposed method is demonstrated by a number of illustrative examples.

서지기타정보

서지기타정보
청구기호 {MIE 98004
형태사항 vi, 48 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, k_(0)와 k_(1)의 관계 유도. - B, $k_{mid_1}$, $k_(mid_2}$, $k_{max}$의 수식 유도. - C, 오차(Error)의 정의. - D, 실험 대상 커브들을 생성한 CL-surface
저자명의 영문표기 : Sung-Chul Kim
지도교수의 한글표기 : 최병규
지도교수의 영문표기 : Byoung-Kyu Choi
학위논문 학위논문(석사) - 한국과학기술원 : 산업공학과,
서지주기 참고문헌 : p. 38-39
주제 바이아크
근사
자유곡면모델링
데이터 감소
Biarc
Fitting
SSM
Data reduction
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