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강형진(Hyung-Jin Kang) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
In this paper, PBA (Panic Brake Assist) system for MANDO MGH is introduced to propose a new capability in active safety car system development. Basically, MANDO PBA system is based on VDC(Vehicle Dynamics Control) hardware with precharge accumulator. During operation, the control unit of MANDO PBA can detect panic situation from abrupt time variation of master cylinder pressure. In case of panic detection, it will build up the wheel cylinder pressures within a fraction of a second until ABS operation, thereby considerably reducing the car's stopping distance. In our field test with a Benz A class car, MANDO PBA shows better stopping ability compared with a brake assist system equipped with ECB (Electronically Controlled Booster. Through further research on driving comfort, PBA system for MANDO MGH can make some ontribution towards improving road safety and reducing accident
이상일(Sang Il Lee),강형진(Hyung Jin Kang),이숙희(Sook Hee Lee) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1994 소아알레르기 및 호흡기학회지 Vol.4 No.2
N/A Allergic rhinitis and sinusitis are independently common disorders, and their association is also recommended as the study, we observed cromoglycate and one very common. For the treatment of sinusitis, antibiotics is first choice, whether it is due to allergy or non-allergy. In this the effect of anti-allergic treatment (two weeks of disodium week of topical budesonide) for sinusitis in allergic rhinitis. Among 299 children with chronic nasal symptoms, 235(78.6%) children were allergic and 64(21.4%) children were non-allergic. One hundred fifty two(64.6%) children with allergic rhinitis had sinus problems on X-ray study. (Table 1) Firstly, we treated them with two weeks of anti-allergic drugs. Antihistamines and antibiotics were not included. One hundred seven(70.4%) children were improved clinically and radiologically. Forty five(29.6%) children who were not improved, received amoxicillin for 2 weeks, and 33 were improved. Among 12 children who did not responded to amoxicillin, cefaclor or reeducation were effective in 4 patients and anatomical deformities were found in 2 cases. In conclusion, anti-allergic treatment must be the first line up treatment for the sinusitis associated with allergic rhinitis.
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홍대건(Daegun Hong),허건수(Kunsoo Huh),강형진(Hyung-Jin Kang),윤팔주(Paljoo Yoon),황인용(Inyong Hwang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
The wheel slip control systems are able to control the braking force more accurately and can be adapted to different vehicles more easily than conventional ABS systems. In order to achieve the superior braking performance through the wheel-slip control, real-time information such as the tire braking force at each wheel is required. In addition, the optimal target slip values need to be determined depending on the braking objectives such as minimum braking distance, stability enhancement, etc. In this paper, for a monitoring the braking force, a robust wheel slip controller is developed based on the adaptive sliding control method and an optimal target slip determination algorithm. The controller determines the required pressure in the EHB(Electro-Hydraulic Brake) master cylinder to maintain the target wheel slip ratio during braking. The performance of the proposed wheel-slip control system is verified in simulations.
홍대건(Daegun Hong),윤팔주(Paljoo Yoon),강형진(Hyung-Jin Kang),황인용(Inyong Hwang),허건수(Kunsoo Huh) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
The wheel slip control systems are able to control the braking force more accurately and can be adapted to different vehicles more easily than conventional braking control systems. In order to achieve the superior braking performance through the wheel slip control, real-time information such as the tire braking force at each wheel is required. In addition, the optimal target slip values need to be determined depending on the braking objectives such as minimum braking distance, stability enhancement, etc. In this paper, a wheel slip control system is developed for maintaining the vehicle stability based on the braking monitor, wheel slip controller and optimal target slip assignment algorithm. The braking monitor estimates the tire braking force, lateral tire force and brake disk-pad friction coefficient utilizing the extended Kalman filter. The wheel slip controller is designed based on the sliding mode control method. The target slip assignment algorithm is proposed to maintain the vehicle stability based on the direct yaw moment controller and fuzzy logic. The performance of the proposed wheel slip control system is verified in simulations and demonstrates the effectiveness of the wheel slip control in various road conditions.