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K-평균 군집모형 및 순서형 로짓모형을 이용한 버스 사고 심각도 유형 분석 측면부 사고를 중심으로
이인식,이현미,장정아,이용주,Lee, Insik,Lee, Hyunmi,Jang, Jeong Ah,Yi, Yongju 한국자동차안전학회 2021 자동차안전학회지 Vol.13 No.3
Although accident data from the National Police Agency and insurance companies do not know the vehicle safety, the damage level information can be obtained from the data managed by the bus credit association or the bus company itself. So the accident severity was analyzed based on the side impact accidents using accident repair cost. K-means clustering analysis separated the cost of accident repair into 'minor', 'moderate', 'severe', and 'very severe'. In addition, the side impact accident severity was analyzed by using an ordered logit model. As a result, it is appeared that the longer the repair period, the greater the impact on the severity of the side impact accident. Also, it is appeared that the higher the number of collision points, the greater the impact on the severity of the side impact accident. In addition, oblique collisions of the angle of impact were derived to affect the severity of the accident less than right angle collisions. Finally, the absence of opponent vehicle and large commercial vehicles involved accidents were shown to have less impact on the side impact accident severity than passenger cars.
이창재(Changjae Lee),정호철(Hochul Jung),장유진(Eugene Chang),이인식(Insik Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
There has been lots of parking assistant systems have been proposed to give a driver safe guidance for parallel or garage parking. In this paper, a single camera based parking assistant system is proposed, which is composed of steering actuator, image processing unit which has a role of image to world coordinate mapping or vice versa, and main unit. The mapping logic between image and world coordinate using a single camera is implemented to give a start position of a car and given by a lookup table. The reference trajectory of garage parking consists of an arc of circle and a straight line. The constant steering angle calculated based on geometry is commanded to steering actuator in the circular arc section of reference trajectory. Two methods with constant and fuzzy based steering angles are applied for the tracking of line trajectory.
정의윤(Euiyoon Chung),이인식(Insik Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Adaptive cruise control (ACC) systems, which maintain following distance from a preceding vehicle, are available from automobile manufacturers. A distance and relative velocity of the preceding vehicle can be estimated by analyzing a vehicle-mounted millimeter-wave radar signal. Because of a characteristic of the radar and the relative velocity of the preceding vehicle, it is difficult to detect and track the preceding vehicle in the same lane. In this paper, an algorithm is proposed to solve the tracking difficulties. The proposed algorithm separates radar range into some blocks, and detects and tracks a preceding object as a detected block. Applying this algorithm and assigning a priority between the blocks, the searching range for the targeting vehicle and response time of the system are reduced.
김규찬(Gyuchan Kim),이인식(Insik Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
The passenger car manufacturer should meet more and more strict requirements of customers on the convenient systems. It is proven that the Taguchi method is a powerful tool for improving the product quality in many areas. This paper employs the Taguchi method to optimize control performance of the outside mirror. Parameter diagram is used to classify the variables associated with the product into noise, control. input signal. and response factors. Performance is estimated between initial design factors and optimal design factors after optimal control factors are determined through the test of tables of orthogonal array. The final test result of outside mirror designed optimally shows that the Taguchi method can be applied efficiently to optimize control performance.
손정덕(Jungduk Son),이인식(Insik Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
Recently, due to tremendous increasing numbers of applying the convenience systems in the vehicles and their complexity of the functions, the specification of body control module(BCM) becomes very complicated. As a result, existing test procedure for them has been reached its limit In this paper, new validation methodology which adopts the Taguchi method for these complicated systems will be suggested.
DGPS를 이용한 주행차량의 정밀위치인식시스템에 관한 연구
엄재용(Jaeyong Um),이인식(Insik Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As the first step to a DGPS-based autonomous driving system, the test ground was constructed and a DGPS RTK navigation system was developed fur the autonomous vehicle. Two sets of NovAtel DL-4 GPS receivers and Cisco-350 wireless LAN equipments were used for the DGPS test ground, and an accurate digital map for the test ground was made to provide the reference position of the vehicle. For the digital map, the test lane was measured five times using the DGPS RTK and the smooth lane data was obtained by the polynomial curve fitting.<br/> The positioning error of the traveling vehicle based on the digital map is composed of the map error and the navigation error of the vehicle.. The map error is composed of the DGPS rover setting error, measuring operation error and the inherent DGPS RTK measurement error with the curve fitting. The navigation error of the vehicle is composed of the DGPS RTK error and the GPS antenna installation error. Of course the positioning error due to latency should be examined and compensated in the autonomous system controller design later. The vehicle position was measured using the external equipments and compared with the estimated position to show the lateral positioning error of 3.2cm RMS.
ACC 시스템 ECU 검증을 위한 Brake Hardware-in-the-Loop Simulation System 개발
문일기(Ilki Moon),이경준(Kyoungjun Lee),이경수(Kyongsu yi),이인식(Insik Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper describes an investigation of the Brake HiLS(Hardware-in-the-loop Simulation) System for verification of ACC System ECU. Since vehicle tests are costly and time consuming, how to establish an efficient and low cost development system is an important issue. Brake HILS system prevents the error that occurs in case of modeling the hydraulic system of ESP module, and has an advantage of developing ECU for ACC System by using interface which is same as real vehicle environment. Brake HiLS system consists of a brake pressure control unit, ACC System ECU, target computer for realtime simulation and host computer which is used to control the target computer and to save simulation data. This paper also includes the test result of Brake HiLS system in low speed driving scenario with stop situation.