http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
경차용 전동조향장치의 성능평가를 위한 시뮬레이터의 개발
한창수,이명호,박호,오재응,Hahn, Chang-Su,Rhee, Meung-Ho,Park, Ho,Oh, Jae-Eung 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.6
Steering system is most important for vehicle in safety and driving feel. However, testing using real car to improve steering feel is often difficult in aspect to repeatability, safety and money. Repeatability in testing steering system is very important because steering feel for driver is variable according to the environment condition. And steering testing of vehicle is so dangerous that driver may not concentrate in testing. In this paper, the steering system simulator using front part of steering and suspension system was developed. We can test the electric power steering system for the light weight vehicle using this simulator cheap, safely and repeatably.
레이저 점선 패턴가공된 금속표면의 윤활조건에 따른 마찰특성에 관한 연구
정우영(Woo-young Chung),김상호(Sang-Ho Kim),한형욱(Hyung-Wook Han),민준원(Joon-Won Min),정원용(Won-Yong Jeung),이명호(Meung-Ho Rhee) 한국레이저가공학회 2010 한국레이저가공학회지 Vol.13 No.2
A high speed laser texturing method that relies on laser scanner conditions, to form pattern shapes with micro-narrow surface detail such as dotted line features is demonstrated and analyzed. For example, this method may be used to piston ring and gear part for automotive. Data on friction characteristics of two laser patterns employed for STD61 steel will be shown. Comparison of pattern depths obtained by repetition overlapping process with laser scanner to the results on friction coefficient will be provide. It will be shown that friction characteristic in dotted line patterns can significantly depend upon interaction with the lubrication and laser pattern conditions. Laser pattern processing into a shallow depth provides only slight improvement in friction, while work into a deep shape indicates a significant improvement.
자동차용 현가장치의 반능동 제어 시스템의 설계파라미터에 대한 연구
박호,한창수,이명호,노병옥 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1
In the determination of control laws of semi-active suspension system, optimal control theory is applied, which used in the design of fully active suspension system and in the performance index sense. Optimal semi-active control laws are designed, and the computer program is developed for estimation of performance in the time and frequency domain. It is certified that in the semi-active control system, it is desirable to minimize the spring constant and damping coefficient as possible in the given constraints. The effect of performance improvement which is almost equal to fully active type is obtained.
조향감을 고려한 자동차용 전동조향장치의 퍼지제어기의 개발
한창수,이명호,박호 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.2
The test method using simulator to objectively measure the steering fell from several drivers was proposed. It has also described the ideas to analyse the principal factors affecting the steering feel of the driver using the correlation analysis of the measured data and questionnaire. Proportional Derivative(PD) controller has been used to measure the steering feel, and the control parameters have been selected to obtain the optimal steering feel. Membership functions of Sugeno fuzzy model are constructed from the assist torque values calculated from PD controller at each steering state. Moreover to verify the performance, this fuzzy controller has been compared with the another fuzzy controller of membership functions are derived from the knowledge of drivers. As a result, it can be concluded that the proposed fuzzy controller improves the steering feel at each steering stat move than any other conventional methods.
용탕단조법으로 제조된 Al-Ni 복합재료 피스톤링의 파괴기구
이성학,추성훈,이명호 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.1
The main objective of this study is to investigate the effect of microstructure on the fracture behavior in two Al-Ni composite piston rings fabricated by squeeze casting method. Microstructural observation and insitu SEM fracture test were conducted on the composites to identify the microfracture processes. Detailed microstructural analyses showed that the reinforcing Ni contained an amount of Ni₃Al and NiAl phases near the Ni/Al interfacial region, which enhance the overall hardness of the composites. It was also found from in-situ observations of crack initiation and propagation that the interfacial debonding occurred at the Ni/Al interface in the early loading stage, providing an easy crack propagation path. In order to improve mechanical properties of the composite piston rings, thus, the improvement of interfacial properties by applying a new coating method is suggested.
Space Frame 용 알루미늄 압출튜브의 충돌흡수에너지 평가
김동국,이성학,이명호,김승보 대한금속재료학회(대한금속학회) 1997 대한금속·재료학회지 Vol.35 No.2
The compressive deformation behavior under dynamic loading was investigated using a high performance servo-hydraulic machine in order to evaluate experimentally impact absorption energies of extruded aluminum tubing for space frame. Dynamic compression tests were conducted for three extruded aluminum tubing whose thicknesses were 1.5 ㎜, 2.0 ㎜, and 3.0 ㎜, and then the test data were compared via observation of deformation mode. The results indicated that the dynamic deformation behavior correlated well with load-displacement curve data, i.e., the number of peaks formed by the compression-resistant force matched with the number of plastic hinges formed during compression. In the tubing with thickness of 3.0 ㎜, the number of plastic hinges decreased, and bending occurred seriously. This leaded to drop in impact absorption energies per unit cross-sectional area since energies could not be absorbed effectively upon bending. These findings suggested that in order to improve impact absorption energies of the extruded aluminum tubing for space frame, their thickness less than 3.0 ㎜ and the design of their cross-section for promoting folding instead of bending were recommended.