Development of adaptive cruise control system based on speed characteristics and laser scanner | |
| Author | Nassaree Benalie |
| Call Number | AIT Thesis no.ISE-09-34 |
| Subject(s) | Scanning systems Adaptive control systems |
| Note | A thesis submitted in partial fulfillment of the re quirements for the degree of Master of Engineering in Mechatronics, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ISE-09-34 |
| Abstract | An adaptive cruise control (ACC) which was implemen ted on an AIT Intelligent Vehicle, has been improved and added with more feat ures to allow the vehicle to act with better performance compared with the previous system. An important feature of the new adaptive cruise control system is the abili ty to maintain a proper inter-vehicle gap based on the current speed of vehicle ahead and the desired time headway (THW). To develop adaptive cruise control system, t he original throttle valve control was remodeled to the drive-by-wire system which ado pts a DC servo motor to control the throttle valve position with command compensati on. In the automatic braking system, a DC motor is installed with steel cable tr ansmission in order to pull the brake pedal to the desired level automatically by applyin g torque control. The brake control and velocity control have been merged together to c ontrol the speed to any desired speeds as fast as possible without jerk and steady- state error. A micro switch is installed at the brake pedal to allow the driver to take over the entire control of the vehicle anytime. There are three important inputs o f the ACC system, speed of leading vehicle read from electronic control unit ( ECU), THW set by driver, and actual gap measured from a laser scanner. The ACC p rocesses these three inputs in order to calculate distance error and relative velo city which are used as the two inputs of a fuzzy controller. The fuzzy controller determi nes the desired speed command to maintain a proper gap based on the current speed of vehicle ahead and the desired time headway. Experiments are conducted to evaluate the performance of the ACC system in several conditions. The results show good performance of the adaptive cruise control system. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ISE-09-34 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Manukid Parnichkun |
| Examination Committee(s) | Afzulpurk, Nitin V.;Pisut Koomsap |
| Scholarship Donor(s) | RTG Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |