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편경사 도로에서의 차량 안정성 제어를 위한 차등제동 분배
정태영(Taeyoung Chung),한동훈(Donghoon Han),이경수(Kyongsu Yi) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
A detection or estimation of bank angle was investigated by many researchers to hold the vehicle stability controller or to ensure the robustness of the lateral velocity estimator. Furthermore, the controller which utilizes lateral velocity estimate can be designed by considering the bank angle effects. Since a driver could not recognize the bank angle effect, he or she steers in the same way either driving on a road with or without bank angle in critical driving situation. With bank angle estimator, the vehicle stability control logic and its desired values are modified to compensate the bank angle effects. To investigate the driver’s reaction on obstacle avoidance maneuver, the Human-in-the-loop evaluation is applied by using driving simulator. By using the modified VSC logic, the driver reacts similarly on both banked road and flat road in the same emergency driving situation. Therefore the proposed control logic is said to be preventing a driver from misjudgment on a bank road.
의료기기의 구매결정요인과 만족 및 재구매 의도의 구조적 관계에 관한 연구
정태영(Chung, Taeyoung),서건석(Seo, Geon-seok),김수범(Kim, Su-beom) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.5
본 연구의 목적은 의료기기의 구매결정요인과 만족 및 재구매 의도의 구조적 관계를 파악하는 것이다. 본 연구의 자료는 보건복지부의 2012년 의료기관 의료기기 사용실태조사이며, 이 중 초음파영상진단장치를 보유하고 있는 종합병원 급 이상의 116개 의료기관을 분석하였다. AMOS 21 Ver.를 사용하여 확인적 요인분석과 구조방정식을 실시했으며, 주요 결 과는 다음과 같다. 첫째, 의료기기 구매결정요인 중 브랜드는 만족에 유의한 영향을 주었으며, 만족은 다시 재구매 의도에 유의한 영향을 미쳤다. 둘째, 성능과 서비스는 유의하지 않지만 만족에 정의 영향을 주었으며, 가격은 만족에 부의 영향을 주었으나 유의하지 않은 것으로 나타났다. 본 연구는 의료기기 구매결정에 관한 실증적 연구가 부족한 상황에서, 확인적 요인 분석을 토대로 하여 실증적으로 의료기기 구매결정요인을 제시했으며, 의료기기 시장의 효율적인 마케팅 전략 수립과 의료 기기산업의 경쟁력 제고에 관한 기초자료를 제공했다는데 그 의의가 있다. The purpose of this study is to investigate the casual relationships among purchase decision factors of medical devices, satisfaction and repurchasing intention. Data of this study is a 2012 survey on medical institutions using medical devices of MW(ministry of health and welfare) and We analyzed 116 medical institutions having ultrasound imaging system lager than general hospitals among data. For empirical analysis, we carried out confirmative factor analysis and path-analysis using AMOS 21.0 package. Main results of this study are as follows: First, brand has positive influence on satisfaction and satisfaction has positive impaction on repurchase intention. Second, although not statistically significant, performance and service have positive impaction on satisfaction and price has negative influence on satisfaction. The significance of this study is to provide empirical basis on establishment of efficient marketing strategy and enhancement of competitiveness for the medical device industry
차량 횡방향 속도 추정기 및 노면 편경사 각도 추정기의 성능 검증
정태영(Taeyoung Chung),민경찬(Kyongchan Min),이경수(Kyongsu Yi) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The estimation of vehicle lateral velocity is essential to development of integrated vehicle dynamic control system. A conventional vehicle stability control system contains yawrate sensor and lateral acceleration sensor, and both sensors are affected by bank angle directly. By using existing vehicle sensors, we validate various bank angle estimators and vehicle lateral velocity estimators via vehicle test.
Estimation of Cost of Energy for Offshore Wind Turbines
정태영(Chung, Taeyoung),문석준(Moon, Seokjun),이한민(Lee, Hanmin),임채환(Rim, Chaewhan) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
Large offshore wind farms have actively been developed in order to meet the needs for wind energy since the land-based wind farms have almost been fully developed especially in Europe. The key problem for the construction of offshore wind farms may be on the high cost of energy compared to land-based ones. NREL (National Renewable Energy Laboratory) has developed a spreadsheet-based tool to estimate the cost of wind-generated electricity from both land-based and offshore wind turbines. Component formulas for various kinds and scales of wind turbines were made using available field data. Annual energy production has been estimated based on the Weibull probability distributions of wind. In this paper, this NREL estimation model is introduced and applied to the offshore wind turbines now under designing or in production in Korea, and the result is discussed.
노이즈 캔슬링 기법을 이용한 단일 입력 차동 출력 구조의 광대역 저잡음 증폭기
정태영(Taeyoung Chung),윤제형,서희송,최인영,김범만 대한전자공학회 2010 대한전자공학회 학술대회 Vol.2010 No.6
An balun low-noise-amplifier(LNA), a single-input and differential-output structure, is designed for TV tuner applications between 50MHz and 900MHz. It is achieved by a combination of common-gate and common-source stage which has a 180° phase difference and a following buffer stage for an output matching. The common gate stage also plays a part of an input matching. The total Noise figure is lower than 2.55dB over the bandwidth and the gain is 12.2-14.6dB while the linearity is still good. (The IIP3/IIP2 is 2.6dBm/9dBm.) The gain and phase errors are below 0.14dB and 3.8° while consuming 10mA current from 1.5 V supply voltage.
정태영(TaeYoung Chung),송관웅(KwanWoong Song),김창수(Chang-Su Kim) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7
We investigate error patterns in compressed multi-view videos and propose a multi-hypothesis algorithm, which is adaptive to the error patterns. Different from multi-hypothesis algorithms for mono-view sequences, the proposed algorithm exploits inter-view correlations in multi-view sequences as well as spatio-ternporal correlations. Simulation results demonstrate that the proposed algorithm effectively protects the quality of reconstructed videos against transmission errors.
정태영(Chung, Taeyoung),문석준(Moon, Seokjun),임채환(Rim, Chaewhan) 한국신재생에너지학회 2012 신재생에너지 Vol.8 No.4
Large offshore wind farms have actively been developed in order to meet the needs for wind energy since the land-based wind farms have almost been fully developed especially in Europe. The key problem for the construction of offshore wind farms may be on the high cost of energy compared to land-based ones. NREL (National Renewable Energy Laboratory) has developed a spreadsheet-based tool to estimate the cost of wind-generated electricity from both land-based and offshore wind turbines. Component formulas for various kinds and scales of wind turbines were made using available field data. In this paper, this NREL estimation model is introduced and applied to the offshore wind turbines now under designing or in production in Korea, and the result is discussed.
정태영(Taeyoung Chung),김두형(Duhyung Kim),양승훈(Seung-Hoon Yang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In the case of a full-braking on a split-mu road, the ABS (Anti-lock Brake System) controller should make a compromise between a braking performance and a lateral stability of the vehicle. It depends on vehicle characteristics of lateral behavior and the needs of a vehicle designer. By adding steering torque properly, ESC (Electronic Stability Control) and MDPS (Motor Driven Power Steering) integrated control system makes a driver steer to the right direction, and even reduces braking distance. Although the system does not improve vehicle behavior directly, it can inspire drivers to steer to the right direction by changing steering torque assistance characteristics. The test results show that the proposed system assists a driver well to keep the lane, improves braking performance, and ensures hands-off stability on the split-mu full braking.