컨조인트 분석을 이용한 BRT 및 바이모달 트램 이용 속성의 효용 산정 연구 (세종시를 중심으로)

박상민,김경현,고한검,목재균,이종화,윤일수 한국도로학회 2017 한국도로학회논문집 Vol.19 No.4

PURPOSES :This study was initiated to estimate the utilities of usage attributes of BRT and Bimodal Trams using a conjoint analysis method in order to identify the important features pertaining to the use of BRT and Bimodal Trams.METHODS :For this purpose, important attributes and those level in the use of BRT and Bimodal Trams in the city of Sejong were identified. Next, a profile questionnaire pertaining to BRT and Bimodal Trams was designed for the conjoint analysis, and a survey was conducted in the city of Sejong. Using SPSS software, conjoint analysis was performed to identify the important attributes vis`-a-vis the use of BRT and Bimodal Trams in the city of Sejong. Finally, the utilities for individual attributes were calculated based on the models estimated by the conjoint analysis.RESULTS :The results of the conjoint analysis were used to identify the important attributes. With regard to the usage of BRT, users indicated that fare was the most important attribute with the highest utility. In the case of Bimodal Trams, the users indicated that the number of seats and internal environment were the most important attributes with the highest utilities.CONCLUSIONS :Based on the results of the conjoint analysis, the important attributes pertaining to the use of BRT and Bimodal Trams in the city of Sejong were identified. Our study indicates that BRT in the city of Sejong needs to be upgraded to improve the utilities of the important attributes. Currently, Bimodal Trams has not been introduced completely in the city of Sejong. However, in the future, when the introduction of Bimodal Trams is completed, the important attributes should be emphasized in order to improve the quality of its service.

Longitudinal Control of Bimodal-tram using Sliding Mode Control

Yeun-Sub Byun,Min-Soo Kim,Jai-Kyun Mok,Young-Chol Kim 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10

In this paper, we propose the longitudinal controller of bimodal tram. The bimodal tram is developed by Korea Rail road Research Institute (KRRI). The bimodal tram is all wheel steered single articulated vehicle and will be equipped with the automated control systems. The key technology of the systems is longitudinal and lateral vehicle control algorithm. The longitudinal control is concerned with traction control and brake control of the vehicle and the lateral control is concerned with steering control. First, a longitudinal vehicle model is introduced for traction and brake. Then, a velocity tracking controller is designed based on sliding mode control. The simulation results are provided to illustrate the performance of the proposed algorithm.

바이모달 트램 교차로 설계방안 연구

윤희택(Hee-Taek Yoon),박영곤(Young-Kon Park) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10

바이모달트램 전용선로에 설치되는 교차로는 2 개 이상의 전용선로 또는 전용선로와 다른 노선이 일정지점에서 교차 또는 접속되는 공간과 이와 관련한 교통시설물이 설치되는 범위로 정의할 수 있다. 바이모달트램 교차로는 적용지역의 지형, 도로 폭원, 교통량 등의 도입 환경과 계획노선 특성 및 운영계획 등을 종합적으로 고려하여 합리적인 교차로 형식을 검토하고, 이를 통한 계획 및 설계가 이루어져야 한다. 전용 통행권 보장을 통한 정시성 확보, 양질의 교통서비스 제공 측면에서 교차로 입체화 방안을 우선 고려할 수 있지만, 최근 도시환경 측면과 민원 발생 등으로 교차로 설치가 어려운 것도 현실이다. 본 연구에서는 바이모달트램의 교차로 계획의 기본방향과 평면 및 입체교차로 구축방안을 제시하였다. The intersection on dedicated lane for the bimodal tram is defined as the contact point of two routes of bimodal tram or bimodal tram and other transportation means, space transportation facilities are installed. Surrounding environment, such as configuration and width of road, traffic volume and operation plans should be considered when we design intersection on dedicated lane for bimodal tram. We can first consider grade separation in order to secure punctuality through right-of-way guarantee, but installation of bridge is difficult because of urban environmental aspects. In this study, The basic direction of intersection design is presented in this study.

바이모달트램 전용선로 포장 설계방안 연구

윤희택(Hee-Taek Yoon),박영곤(Young-Kon Park) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10

바이모달트램 전용선로 포장은 차량이 주행하는 전용도로 및 전용차로 구간, 즉 전용선로에 대한 포장을 의미한다. 바이모달트램 전용선로 포장은 고속도로, 국도, 도시간선도로 등 일반적 도로건설 기준 및 설계방식을 따라야 하지만, 설계교통량, 하중,자동운행 특성 등 바이모달트램만의 고유한 특성도 감안해야 한다. 바이모달트램 전용선로에는 정해진 선로를 따라 자동 주행하는 선로형 교통하중이 작용한다. 일반 차로의 포장 형태나 구조와는 달리 차량의 좌, 우측 바퀴가 접하지 않는 주행로의 중앙부를 제거하여 단면을 절감하고, 주행로상에 잔디 식재공간을 확보함으로써 차량 주행소음 및 열섬현상 감소,경관 향상 등의 친환경 효과를 기대할 수 있다. 본 연구에서는 바이모달트램 전용선로의 포장형식과 공법의 선정, 포장단면의 설계방안을 제시하였다. The Pavement of dedicated lane for bimodal tram should follow general design approach, but it should be considered the unique characteristics of traffic, load, auto guidance only for bimodal tram. Unlike general paving form or structure, rail type traffic load is applied in dedicated lane for bimodal tram. In pavement design of dedicated lane, the central part of dedicated lane is removed, because there is not applied vehicle load. By doing so, we can expect that reduction of heat island effect and vehicle noise and landscape improvement by planting grass on the removal part of dedicated lane. In this study, paving type and crosssectional design and construction method on pavement design of dedicated lane for bimodal tram is presented.

Multibody dynamic analysis of a duplicate bimodal tram

이호용,목재균,문경호,홍희록,이정환,서명원 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.2

This study aimed to dynamically analyze a simulated bimodal tram by determining the motion equations for computer-aided analysis with Newton-Euler equations of motion, which algebraically represent motion. We utilized the multi-body dynamics analysis program, MSC.Adams, to evaluate the equations of motion, running stability, curving performance, and ride comfort of the simulated bimodal tram in comparison with single fleet and double fleet trams. For the double fleet tram, the characteristic equation was deduced to control the all-wheel steering mechanism by independently moving all the wheels characterizing an articulated vehicle. Our study aimed to design a double fleet bimodal tram. We confirmed that domestic and international standards were satisfied via the design and analysis of the simulation. Steering control equations are the significant preliminary data for coupling device research and development for double fleet bimodal trams.

PXI embedded real-time controller를 이용한 Bimodal-tram Simulator

변윤섭(Yeun-Sub Byun),김영철(Young-Chol Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.3

In this paper we present the Bimodal-tram simulator using the PXI embedded real-time controllers. The Bimodal-tram is developed in KRRI (Korea Railroad Research Institute). The vehicle can be automatically operated by navigation control system (NCS). For the automatic driving, the vehicle lanes will be marked with permanent magnets that are placed in the ground. The vehicle is controlled by NCS. NCS governs the manual mode and automatic mode driving. The simulator is designed by an identical conception with the real control condition. The dynamic motion of vehicle is simulated by the nonlinear dynamic model. The control computer calculates the control values. The signal interface is linked by CAN communication. The simulation is processed by real-time base. The test driver can see the graphic motion of vehicle and can operate the steering wheel, gas and brake pedal to control direction and velocity of vehicle during the simulation. At present, the simulator is only operated by manual mode. The automatic mode will be linked after the control algorithm is finished. We will use the simulator to develop the control algorithm in the automatic mode. This paper shows the simulator designed for Bimodal-tram using real-time based controller. The results of the test using the simulator are presented and discussed.

바이모달 트램 견인장치 개발

윤희택(Hee-Taek Yoon),박영곤(Young-Kon Park),조세현(Se-Hyun Cho) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10

자동운전과 수동운전이 가능하고, 인프라의 선택적 적용을 통하여 서비스 품질과 비용을 동시에 만족시킬 수 있는 새로운 도시교통수단인 바이모달트램이 국산화 개발되어 실용화를 앞두고 있다. 바이모달트램은 2량 혹은 3량 편성의 굴절차량으로 운행 중 고장이 발생할 경우에 이를 신속하고 안전하게 견인할 설비가 필요하다. 하지만, 국내 개발된 차량에 적합하고, 저비용으로 견인이 가능한 설비가 없는 것이 현실이다. 트레일러를 이용한 견인설비는 전차륜 조향(AWS)차량의 안정적인 견인이 가능하다는 이점이 있으나, 상대적으로 견인시간이 길고, 비용이 고가이므로 일반적인 견인장치로 사용하기에는 다소 무리가 있다. 본 연구에서는 일반 견인차량에 탈부착을 가능하게 함으로써 저비용으로 바이모달트램을 안전하게 견인할 수 있는 견인지그를 개발하고, 실차 테스트를 통하여 활용가능성을 검증하였다. The bimodal tram ahead of practical use as a urban transportation means. The bimodal tram can simultaneously satisfy the quality of service and cost through the selective application of the means of infrastructure. If a fault occurs in a car during driving, the traction device which can be quickly and safely towed to the facility is needed. However, there is no suitable and low-cost equipment for traction for bimodal tram. It is not suitable trailer towing equipment because traction time is relatively long and cost is high. In this study, the towing jig which can be attached and removed to the general traction vehicle is developed and verified the usability by vehicle test.

바이모달 트램용 구동시스템 서브프레임의 안정성 평가

이종화(Lee Jong-Hwa),김덕기(Kim Duk-Gie),문경호(Moon Kyeong-Ho) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

Bimodal Tram, equipped with rubber tired, is an new transit system that can be operated on both public road and private road. It must be proven that the stability of Sub-frame supporting the driving wheel. This paper describes that evaluated stability of the Sub-frame for driving system of Bimodal Tram by comparing with results of the Static Load Test and Strength Analysis. The static load test based on ‘the load test methods of bogie frame of railway rolling stock’ and ‘Standard for performance test of urban railway vehicle’. And the strength analysis was using the NASTRAN, a general purpose dynamics analysis software. As a result, It was ensured that the stability of the sub-frame applied to the driving system of Bimodal Tram.

바이 모달 트램의 전기 제어 장치용 냉각장치에 관한 연구

김창욱(Chang-Uk Kim),김혜수(Hea-Soo Kim),송정일(Jung-Il Song) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.4

In this study, the first and second electronically controlled cooling systems for a bimodal tram were developed. The performance characteristics of the cooling systems were assessed experimentally with actual and identical conditions, and a simulation was run using ANSYS Fluent. The results of the experimental and FEA method were standardized. In order to confirm the reliability of the experimental method, the experiment was carried out by a testing institution. The low-volume flow-rate condition was found to be better, but the cooling system performed in a minimal condition. Therefore, it is important to find the optimum performance levels. The cooling system equipment was revised to determine the optimized design parameters, after which the cooling performance levels increased at the radiation area. Specifically, with a greater fan diameter. Through this study, the newly developed cooling system will be reevaluated after being mounted on an actual bimodal tram. This will lead to a completely domestically produced bi-modal tram cooling system.

바이모달 트램 군집주행 안정성 및 성능향상을 위한 통신 기반 제어 알고리즘 개발

김순오(Soon-oh Kim),정구용(Koo-yong Jeong),황현철(Hyeon-Chyeol Hwang),오용국(Yong-Kuk Oh),이형철(Hyeong-cheol Lee) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11

본 논문에서는 바이모달 트램간 통신을 적용하여 String Stability를 개선하는 방법을 소개한다. 군집주행 전체의 성능과 안정성을 향상시키기 위해 기존의 Model Free Cruise Control(MFCC) 알고리즘에 차량간 통신을 결합한 새로운 제어 알고리즘을 제안한다. MFCC란 파워트레인이나 브레이크 시스템 모델 없이 차량간 속도, 가속도, 거리 정보를 이용하여 스로틀과 브레이크 인풋을 제어하는 알고리즘을 말한다. 차량간 통신을 통해 동일 방향으로 주행하는 바이모달 트램간에 자유롭게 속도 및 가속도 정보를 주고받을 수 있다. 성능평가를 위한 모의실험 모델은 바이모달 트램의 제원 및 역학 특성을 고려하여 CarSim을 이용해 구성하고, 제어 알고리즘은 MATLAB/Simulink를 이용하여 구현한다. 제안한 제어 알고리즘의 성능 검증을 위해, 통신을 적용하지 않은 군집주행 알고리즘의 성능과 비교한다. This paper is concerned with how to improve the string stability by enabling communication between bimodal tram. In order to improve the performance and reliability of the entire platoon, a new control algorithms is proposed. MFCC is the algorithm that control brake and throttle without brake system model and power train model using acceleration and distance between vehicles. It is possible to send and receive information of velocity and acceleration freely between bimodal tram traveling in the same direction via the vehicle communication. The simulation model for performance evaluation, taking into account the mechanical specifications and characteristics of the bimodal tram is configured using CarSim and the control algorithm is designed using MATLAB/Simulink. In order to verify the performance of the proposed control algorithm, it is compared to the performance of the platoon algorithm that do not apply the vehicle communication.