스쿨 존에서 운전자의 승차감을 수반한 차량 감속 제어에 관한 연구

국문 초록 (Abstract)

최근 많은 전자제어기술이 개발되고 있으며 또한 차량에 적용되고 있다. 이러한 기술들 중 throttle-by-wire, brake-by-wire, steer-by-wire 와 같은 X-by-wire 가 대표적이며 이는 기계적으로 연결된 부분이 전기적인 신호나 액추에이터로 대체된 것이다. 본 논문에서는 스쿨존에서의 차량의 속도 제어를 위하여 throttle-by-wire, brake-by-wire 가 고려되었으며 특히 스쿨 존에서는 다른 지역에 비해 사고가능성이 높다. 그 이유는 보행자가 횡단 시에 다수의 운전자들이 규정속도를 지키지 않기 때문이다. 따라서 본 논문에서는 스쿨 존에서 규정속도 내로 주행하도록 throttle-by-wire, brake-by-wire 를 이용하여 차량을 감속 제어하였으며 이를 위하여 양산차량의 엔진과 변속기의 제원을 사용하였다. 둘째, 차량의 감속에 있어서 운전자와 승객이 불쾌감을 느낄 수 있는 급격한 감속을 줄이기 위하여 제안된 3 차 궤적 추종법을 적용시켰으며 궤적 추종을 위하여 퍼지-PID 제어를 사용하였다. 마지막으로 시뮬레이션을 통하여 제안된 차량의 감속 제어 시스템의 성능을 확인하였다.

다국어 초록 (Multilingual Abstract)

Recently, many electronic control techniques for vehicles have been developed and applied. One of the technologies can be X-by-wire such as throttle-by-wire, brake-by-wire, steer-by-wire, and etc, in which most of mechanical parts are replaced into electrical wire and actuators. In this study, the effect of throttle-by-wire and brake-by-wire control systems on vehicle velocity control, especially in a school zone, are taken into consideration. The number of accidents reported in school zones is higher than that in other places. The reason for this is that many vehicle drivers do not obey speed limit regulations. Moreover, some of the students are careless while crossing the streets. Therefore, in this study, we attempt to develop a method using throttle-by-wire and brake-by-wire control systems for automatically reducing the vehicle speed such that it will be within the speed limit. First, an engine model and a transmission system model are developed for a specific vehicle model. Second, speed reduction is carried out such that the reduction follows a pre-designed cubic spline trajectory; the trajectory is determined such that rapid deceleration, which causes discomfort to the driver and passengers, can be prevented, for which a fuzzy-PID control algorithm is applied for the trajectory following control. Finally, simulation results are presented to verify the performance of the proposed speed reduction control system.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 차량 엔진 및 변속기 모델링
• 3. 감속 제어 시스템의 설계
• 4. 시뮬레이션 및 결과
• 5. 결론
• 참고문헌

참고문헌 (Reference)

1 "http://www.rsmservice.com/service/"

2 Solea, R, "Trajectory Planning with Velocity Planner for Fully-automated Passenger Vehicles" 474-480, 2006

3 Kim, S.-C, "Study on the Vehicle's Collision Avoidance System Design Using the Fuzzy Control Algorithm"

4 Song, B. H, "Speed Adaptation System for Vehicles using RF Communication"

5 ISO, "Mechanical Vibration and Shock Evaluation of Human Exposure to Whole Body Vibration, Part 1: General requirement"

6 Rangwala, N, "Intelligent Remote Speed Control of Foresight Trucks with Driver Interface" 111 : 2002

7 Park, J.-J, "Fuzzy Control System" Kyo-u publish Co 57-69, 2005

8 Li, Y.F, "Development of fuzzy Algorithms for Servo Systems" 9 : 66-72, 1980

9 Jung, D.-H, "Development of Intelligent Vehicle Technology Trends and Future Automotive Technologies"

10 Naranjo, J.E, "Cooperative Throttle and Brake Fuzzy Control for ACC+Stop&Go Maneuvers" 56 (56): 1623-1630, 2007

11 Nise, N. S, "Control Systems Engineering" Benjamin/Cummings Publish. Co 295-676, 1992

12 Kim, J.-H, "A Two- Lyered Fuzzy Logic Controller for Systems with Deadzones" 41 : 155-162, 1994

13 Wu, Z, "A Smart Car Control Model for Brake Comfort Based on Car Following" 10 : 42-46, 2009