http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Span內 集中質量을 갖는 彈性 Arm 先端의 位置制御를 위한 逆動力學的 解析
房斗烈,李聖哲 全北大學校 1995 論文集 Vol.39 No.-
A theoretical calculation is presented for the desired motor voltage driving a flexible arm with a concentrated mass within the span by inverse dynamics. We considered the problem that the tip position of the arm is controlled by the dc servomotor located at the shoulder, which is driven by the voltage obtained by inverse dynamics. As an example, we obtain the motor voltage to shift the end-point of arm from initial position to the desired position by the amount of w_d. Simulation results are obtained by applying the method of the Laplace transform of numerical inversion. Theoretical results which are obtained by inverse dynamics show that there exist fluctuation when acceleration of desired tip trajectory is changed suddenly, and motor voltage shape resembls acceleration curve.
권대규,방두열,소순선,유기호,이성철 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-
This paper presents the robust control of a composite beam using μ-synthesis. The natural frequencies of the composite beam featured by a piezo-film sensor and piezo-ceramic actuator are calculated by using the modal analysis method and then modal coordinates are introduced to obtain the state equations of the structural system. Two-natural frequency were considered in the modelling, because robust control theory which has inherent robustness to structured uncertainty is adopted to suppress the transients vibrations of a glass fiber reinforced(GFR) composite beam. A robust controller satisfying the nominal performance and robust performance is designed using μ-synthesis theory based on the structured singular value. Simulations and experiments were carried out with the designed controller and effectiveness of the robust control strategy was verified by results.
DSP를 이용한 비선형 타이밍벨트 구동시스템의 QLQG/LTR 제어
한성익,방두열 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.4
In this paper, the QLQG/LTR control method is applied for the position control of the nonlinear timing belt diving sys-tem. Parameters of the plant are identified by genetic algorithm and nonlinear elements, such as Coulomb friction and dead-zone, are quasi-linearized by RIDF method. Comparing with the LQG/LTR control, the QLQG/LTR has similar structures of the LQG/LTR, but this method can consider nonlinear effects in designing the controller. Thus, the QLQG/LTR control system is robust to hard nonlinearities such as Coulomb friction. dead-zone, etc. For a given hard non-linear system, through experiments, it is shown that the tracking performance of the QLQV/LTR control system can be very improved than the LQG/LTR control system.
전형주,김병삼,방두열 순천대학교 공업기술연구소 1998 工業技術硏究所論文集 Vol.12 No.-
The problem of sound radiation from infinite elastic beams under the action of harmonic moving line forces is studied. The reaction due to fluid loading on the vibratory response of the beam is taken into account. The beam is assumed to occupy the plane z=0 and to be axially infinite. The beam material and elastic foundation are assumed to be lossless and to follow Bernoulli-Euler beam theory including a tension force (T), damping coefficient (C) and stiffness of foundation (K_S). The non-dimensional sound power is derived through integration of the surface intensity distribution over the entire beam. The expression for sound power is integrated numerically and the results are examined as a function of Mach number(M), wavenumber ratio(r) and stiffness factor(T). Here, the purpose is to explain the response of sound power over a number of non-dimensional parameters describing tension, stiffness, damping and foundation stiffness.
서지원,권대규,방두열,이성철 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-
In this paper, we present a remote measurement system for the wireless monitoring of ECU Sensor Signals of vehicle. In order to measure the ECU sensor signals, the interface circuit is designed to communicate ECU and designed terminal wirelessly according to the ISO, SAE regulation of communication protocol standard. A micro-controller 80C196KC is used for communicating ECU sensor signals. ECU sensor signals are transmitted to the RF-wireless terminal that was developed using the micro controller 80386EX, LCD, and RF-module. 80386EX software is programmed to monitor the ECU sensor signals using the Borland C++ compiler in which the half duplex method was used for the RS232 communication. The algorithms for measuring the ECU sensor signals are verified to monitor ECU state. At the same time, the information to fix the vehicle's problem can be shown on the developed monitoring software. The possibility for remote measurement of ECU sensor signals using 80386EX is also verified through the developed systems and algorithms.
야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로
조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6
Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.