• Journal of Institute of Control, Robotics and Systems
• /
• v.16 no.9
• /
• pp.905-912
• /
• 2010

Modern version of advanced supersonic fighter have ATCS (Automatic Thrust Control System) to maximum flight safety, fuel efficiency and mission capability the integrated advanced autopilot system such as TFS (Terrain Following System), GCAS (Ground Collision Avoidance System) and AARS (Automatic Attitude Recovery System) and etc. This paper addresses the design and verification of ATCS based on advanced supersonic trainer in HILS (Hardware In the Loop Simulator) with minimum hardware modification to reduce of development cost and maintain of system reliability. The function of ATCS is consisted of target speed hold mode in UA (Up and Away) and angle of attack hold mode in PA (Power Approach). The real-time pilot evaluation reveals that pilot workload is minimized in cruise and approach flight stage by ATCS.

• Journal of information and communication convergence engineering
• /
• v.3 no.4
• /
• pp.187-190
• /
• 2005

High aspect ratio via-hole etching process has emerged as one of the most crucial means to increase component density for ULSI devices. Because of charge accumulation in via-hole, this sophisticated and important process still hold several problems, such as etching stop and loading effects during fabrication of integrated circuits. Indeed, the concern actually depends on accumulated charge. For monitoring accumulated charge during plasma etching process, charge-up monitoring sensor was fabricated and tested under some plasma conditions. This paper presents a neural network-based technique for analyzing and modeling several electrical performance of plasma charge-up monitoring sensor.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• v.9 no.2
• /
• pp.303-306
• /
• 2005

High aspect ration via-hole etching process has emerged as one of the most crucial means to increase component density for ULSI devices. Because of charge accumulation in via hole, this sophisticated and important process still hold several problems, such as etching stop, loading effects during fabrication of integrated circuits. Indeed, the concern actually depends on accumulated charge. For monitoring accumulated charge during plasma etching process, charge-up monitoring sensor was fabricated and tested under some plasma conditions. This paper presents a neural network-based technique for analyzing and modeling several electrical performance of plasma charge-up monitoring sensor.

• Transactions of the Korean Society for Noise and Vibration Engineering
• /
• v.23 no.4
• /
• pp.356-364
• /
• 2013

This paper presents a tracking gain-up controller design method to control effectively the vibration of tracking actuator caused by external shocks and remaining velocity after seek control. A pole placement constraint is considered to assure a desired transient response against the vibration of tracking actuator. A loop gain-up constraint is introduced to hold the tracking gain-up loop gain and control bandwidth within allowable bounds. The pole placement constraint is expressed by a matrix inequality and the loop gain-up constraint is considered as an objective function so that genetic algorithm can be applied. Finally, a tracking gain-up controller is obtained by integrating a genetic algorithm with LMI design approach. The proposed tracking gain-up controller design method is applied to the track-following system of a DVD recording device and its effectiveness is evaluated through the experimental results.

• The Journal of Information Technology
• /
• v.3 no.4
• /
• pp.107-128
• /
• 2000

Many Countries in the world are struggling to foster the industry of international convention while attracting various international convention on the politics, economy society, culture, religion and sports. The needs of international conventiones are increasing now becourse of the expansion of international visitors exchanges and it affect on the promotion of national economy development of tour industry internal and overseas public relation of the countries. The important point in this situation is to make a consensus between public organization in eluding goverment related civil industry and academic society and set up and process the long term and short-term strategy basis on the consensus. First related facilities should be enlarged and inproved and maketing activities to hold the conventions that are propec to their facilities should be fostered. Second it is imporment to try to hold the international convention through in troducing our related abilities and facilies if the world and through Positive public realations and marketing activities in the world. Third to perform the inducde international conventions successfully the gualities of related personnel should be improved and the experts such as conventions Planner and simultaneous interprefec should be nurtured. Fourth related enterpries should be supported step by step by goverment level to foster their activifies on holding and operating the international conventions. Fifth the tourism effect can b promoted by harmonizing the tourism and international convention through building large scale convention centers in the cities. Therefore to develop the international conventions industry more positively and effectively publicity work and activity to hold of the goverment posifive and creative effort of related enterprise and people's active participation are all needed.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.10 no.1
• /
• pp.99-116
• /
• 2008

This study reviewed pertinent literature and examined relics of manggon(a headband worn to hold a man's topknot hair in place), donggot(a topknot pin), and chigwan(a topknot cover). Before the modernized short hair style, wearing a gat was an important custom. Therefore, manggon, which was used to hold a man's hair in place under the gat, was considered an essential part of the man's official dress code. Donggot is a pin that held the topknot hair in place. It was a must have for a married man, like the binyeo, a lod-like hairpin, for a married woman. Unlike gwanja, it had nothing to do with official rank, but materials were of a variety of materials, including jade and gold. The structure of the donggot was studied in three parts-head, neck and body. Major forms for the head include the mushroom, bean and ball. Bullet and half-cut bullet forms were also found. Forms for the neck include straight-neck and curved-neck. A neck with a belt around a double chin was also found. Forms for the body include the tetrahedron, octahedron and cylinder. The most popular form for silver and white bronze donggot heads was the mushroom, followed by bean and pile forms. Chigwan is also called chipogwan, chichoal, choalgyesogwan, noingwan and sangtugwan. In poetry it was called chichoal, and it used to be called taegogwan in the past as well. Chigwan was so small that it managed to hold a topknot. According to confucian custom in the Joseon period, by wearing chigwan, men didn't display their bare topknot even when they didn't dress up. When they went out, they wore another official hat over the chigwan.

• Korean Journal of Human Ecology
• /
• v.14 no.3
• /
• pp.453-466
• /
• 2005

The purpose of this study is to investigate the origin of make-up and the beginning of 'Yoenji' cosmetics. The result of this study is as follows: 1. The origin of make-up can be summarized as being originated from the sexual display to maintain tribes and incantatory religion for their existence. The reason for the preference to Yeonji in make-up is that Yeonji has a characteristic of red in color, which seems to hold effective for the sexual display of human beings. 2. The origin of Yeonji (焉支; Safflower) was from Egypt, but its inception as a cosmetic product was with Huns. 'Yeonji' was a term of Hungro race, and was also called Unji (焉支), Yeonji (燕支), Inji (姻支), Urji (閼氏), following the similarity of the sound. These terms were not only the interpretation of the Hunnish sound into Chinese, but also allegorical expression. Unji (焉支), Yeonji (燕支), and Inji (姻支) meant Safflower. Urji(閼氏) meant 'Empress' or 'Wife,' which was pronounced Yeonji (燕支) and Asi (閼氏).

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2006.05a
• /
• pp.327-328
• /
• 2006

Recently, as the infocomindustry is developed, the semiconductor industry as well as the optical industry such as the optical communication and the optical instrument is developed rapidly. The transmission, storage and processing of information has been reaching an limit because amounts of information increase rapidly. The more quickly the optical communication is developed, the more sharply the demand of optical elements increase. The transport and inspection process is time consuming and the error rate is high, because this process are not automated in case of an optical lens. In this paper, the pick-up system that can hold optical elements and be transferred by the ultrasonic transport system is developed. The inspection system that distinguishes between the existence and the nonexistence of a defect is connected easily to pick-up system. The pick-up system separates the optical glass lens by results of the inspection. The automation program is developed by visual c++ programming.

• Journal of Electrical Engineering and Technology
• /
• v.13 no.1
• /
• pp.201-210
• /
• 2018

This paper proposes a new start-up method for a load commutated inverter (LCI) in a large synchronous gas-turbine generator. The initial rotor position for start-up torque is detected by the proposed initial angle detector, which consists of an integrator and a phase-locked loop. The initial rotor position is accurately detected within 150ms, and the angle difference between the real position and the detected position is less than 1%. The LCI system operates in two modes (forced commutation mode and natural commutation mode) according to operating speed range. The proposed controllers include a forced commutation controller for the low-speed range, a PI speed controller and a PI current controller, where the forced commutation controller is connected to the current controller in parallel. The current controller is modeled by Matlab/Simulink, where a six-pulse delay of the thyristor and a processing delay are considered by using a zero-order hold. The performance of the proposed start-up method is evaluated in Matlab/Psim at standstill and at low speed. To verify the feasibility of the method, a 5kVA LCI system prototype is implemented, and the proposed initial angle detector and the system performance are confirmed by experimental results from standstill to 900rpm.

• 제어로봇시스템학회:학술대회논문집
• /
• 2004.08a
• /
• pp.1392-1395
• /
• 2004

In order to successfully develop attitude and orbit control subsystem(AOCS), AOCS engineer performs hardware selection, controller design and analysis, control logic and interface verification on electrical test bed, integrated system test, polarity test, and finally verification on orbit after launching. Attitude and orbit control subsystem for KOMPSAT-2 consists of standby mode, sun mode, maneuver mode, science mode, and power safe mode to stabilize and to control the spacecraft for performing the mission. The sun mode is usually divided into sun point submode, earth search submode and safe hold submode. The maneuver mode is divided into attitude hold submode and ${\triangle}$ V submode, while the science mode divided into science coarse submode and science fine submode. Moreover, it is added to back-up mode which uses wheels as an actuator for sun mode and maneuver mode. In this paper, we describe the controller design process and the performance of the design results with respect to the sun mode and the maneuver mode based on thrusters as an actuator using on flexible model.