http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박민기,박민용 대한전자공학회 1995 전자공학회논문지-B Vol.b32 No.9
In this paper, a new method is proposed where the vision and ultrasonic sensor are used to recognize obstacles and to obtain its position and size. Ultrasonic snsors are used to obtain the actual navigation path width of the mobile robot. In conjunction with camera images of the path, recognition of obstacles and the determination of its distance, direction, and width are carried out. The characteristics of the sensors and the mobile robots used generally make it difficult to recognize all environments; accordingly, a restricted environment is employed for this study.
박민기 서울産業大學校 2000 논문집 Vol.51 No.2
In this paper, a new accurate model for elastic deformation is proposed to provide sufficient realism in virtual force feedback. The modeling technique selected in this paper is based on the fruzzy model to describe a nonlinear elastic deformation. It is shown that the proposed method is useful for the elastic deformation modeling by simulation.
A Comparison of the Fuzzy Display Methods for a Surface Deformation
박민기 한국전기전자학회 2013 전기전자학회논문지 Vol.17 No.2
There are several kind of surface deformation display methods using the fuzzy model. In this paper, we describe three fuzzy display methods for a surface deformation and perform a comparative analysis between the modified fuzzy display method and some conventional fuzzy display methods. In each method, the analysis will be performed through computer simulation in order to show the performance of each algorithm. The results show that the modified method have improved the realism and can be used better than the conventional methods in practical applications.
돼지고기 등심의 염지공정에서 소금농도의 영향: 물질전달 동역학을 중심으로
박민기,이낙훈,인예원,오상엽,조형용 한국산업식품공학회 2019 산업 식품공학 Vol.23 No.1
The impregnation of solid foods into the surrounding hypotonic or hypertonic solution was explored as a method to infuse NaCl in pork loin cube without altering its matrix. Mass transfer kinetics using a diffusive model as the mathematical model for moisture gain/loss and salt gain and the resulting textural properties were studied for the surrounding solutions of NaCl 2.5, 5.0, 10.0 and 15% (w/w). It was possible to access the effects of brine concentration on the direction of the resulting water flow, quantify water and salt transfer, and confirm tenderization effect by salt infusion. For brine concentrations up to 10% it was verified that meat samples gained water, while for processes with 15% concentration, pork loin cubes lost water. The effective diffusion coefficients of salt ranged from 2.43×10-9 to 3.53×10-9 m2/s, while for the values of water ranged from 1.22×10-9 to 1.88×10-9 m2/s. The diffusive model was able to represent well salt gain rates using a single parameter, i.e. an effective diffusion coefficient of salt through the meat. However, it was not possible to find a characteristic effective diffusion coefficient for water transfer. Within the range of experimental conditions studied, salt-impregnated samples by 5% (w/w) brine were shown with minimum hardness, chewiness and shear force.
박민기 서울産業大學校 1996 논문집 Vol.44 No.1
The self-excited oscillation is the phenomenon which can be observed in the systems composed of nonlinear elements. The phenomenon is of fundamental importance in nonlinear systems and as far as the design of a nonlinear system is concerned it should be considered along with the stability analysis. In this paper, the oscillation of a system controlled by a static nonlinear fuzzy controller is theoretically addressed. First, a simple structure of a fuzzy controller is assumed for analysis and its describing function is derived to analyze the self-excited oscillation. Computer simulation is included to show an example where the analysis given in the paper is used to predict the self-excited oscillation of a fuzzy controlled system.
입력 데이타 성분간의 상관관계를 고려한 퍼지 모델링 방법
박민기 서울産業大學校 1997 논문집 Vol.46 No.1
Recently many studies have been conducted on fuzzy modeling[1] since it can describe a nonlinear system better than the conventional methods. Generally, fuzzy models have the capability of dividing input space into several subspaces, compared to linear ones. But hitherto suggested fuzzy modeling algorithms do not take into consideration the correlations input data. As a way to use correlation and divide the input space, the method of principal component is used. Finally, the results of computer simulation are given to demonstrate the validity of this algorithm.
박민기,임성훈 한국전기전자재료학회 2019 Transactions on Electrical and Electronic Material Vol.20 No.2
Because of development of the photovoltaic and wind power generation, distributed generations have been increased. The increase in the distributed generations results in higher fault current which exceeds the capacity of the existing protective device when a fault occurs. Also distributed power sources using DC such as energy storage system and internet data center have been developed. However, DC is more diffi cult and dangerous to interrupt than AC because there is no zero crossing point in case of the occurrence of the short circuit current. Therefore, the study of protective devices against DC is needed. In this paper, DC hybrid current limiting circuit breaker (CLCB) is suggested. The trigger type superconducting fault current limiter was used for current limiting and the divergence current oscillation method was used for interruption. The shortcircuit test was simulated to analyze the current limiting and the interrupting characteristics of the DC hybrid CLCB through the PACAD/EMTDC modeling.
Fault Current Limiting and Magnetizing Characteristics of the Autotransformer Type SFCL
박민기,임성훈 한국전기전자재료학회 2017 Transactions on Electrical and Electronic Material Vol.18 No.3
In designing the autotransformer type superconducting fault-current limiter (SFCL), one must consider that the ironcore can be saturated for the SFCL to have effective fault-current limiting operation. In this paper, to examine thesaturation of the iron core comprising SFCL during the fault period, the linkage flux and the magnetizing current ofthe SFCL were derived from the electrical equivalent circuit with the nonlinear exciting branch. By analysis on thelinkage flux versus the magnetizing current of the autotransformer type SFCL, calculated from the short-circuit tests,the design condition for the suppression of the iron core’s saturation was discussed.
박민기,임성훈 한국전기전자재료학회 2019 Transactions on Electrical and Electronic Material Vol.20 No.3
Because of development of the photovoltaic and wind power generation, distributed generations have been increased. The increase in the distributed generations results in higher fault current which exceeds the capacity of the existing protective device when a fault occurs. Also distributed power sources using DC such as energy storage system and internet data center have been developed. However, DC is more diffi cult and dangerous to interrupt than AC because there is no zero crossing point in case of the occurrence of the short circuit current. Therefore, the study of protective devices against DC is needed. In this paper, DC hybrid current limiting circuit breaker (CLCB) is suggested. The trigger type superconducting fault current limiter was used for current limiting and the divergence current oscillation method was used for interruption. The shortcircuit test was simulated to analyze the current limiting and the interrupting characteristics of the DC hybrid CLCB through the PACAD/EMTDC modeling.