서지주요정보
CNC 엔드밀링용 하이브리드 적응제어 시스템에 관한 연구 = A study on the hybrid adaptive control system for CNC end milling
서명 / 저자 CNC 엔드밀링용 하이브리드 적응제어 시스템에 관한 연구 = A study on the hybrid adaptive control system for CNC end milling / 이택민.
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8013323

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 02033

휴대폰 전송

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리뷰정보

초록정보

In this thesis, a hybrid adaptive control algorithm that controls feed rate is proposed to regulate spindle current. For this purpose, variation of steady state spindle current, time constant, and time delay were examined through experiments based on step end milling under various cutting conditions. The steady-state relationship between spindle current and feed rate can be simplified into a 1st degree equation as shown in equation. The time constant $\tau$ and time delay $t_d$ are maintained without much change in spite of various cutting conditions. Using the above characteristics, the hybrid adaptive control algorithm composed of adjustable P control, fine control, and entry feed rate control was developed. Adjustable P control, which changes the P gain value in accordance with the cutting condition in real time, carries out large-scale control. For adjustable P control, the model of the plant was developed as a 1st order system with time delay. The P gain values obtained by the algorithm were found to have errors less than 10 %. Fine control carries out detailed control to reduce the steady state error that occurs from P control. Fine control, which complements the problems of integral feedback control, uses the static characteristic of equation. Entry feed rate control effectively decreases the peak of current produced when a tool makes contact with a workpiece. Feed rate is reduced as soon as a tool makes contact and controlled for a while by fine control. In order to check the applicability of the hybrid adaptive control algorithm, cutting experiments were carried out under various cutting conditions, different tool diameter, and different work material. The results show that the developed hybrid adaptive control algorithm has good stability as well as excellent applicability behavior.

서지기타정보

서지기타정보
청구기호 {DME 02033
형태사항 viii, 96 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Taik-Min Lee
지도교수의 한글표기 : 양민양
지도교수의 영문표기 : Min-Yang Yang
수록잡지명 : "Hybrid adaptive control based on the characteristics of cnc end milling". Int. j. of machine tool manufacture
수록잡지명 : "New spindle current regulation algorithm for CNC end milling process". Int. j. of advanced manufacturing technology
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 94-96
주제 적응제어
엔드밀링
CNC 공작기계
하이브리드 적응제어
공구 마모
Adaptive control
End milling
CNC machine tool
Hybrid adaptive control
Tool wear
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