A STUDY ON THE MEASUREMENT OF DISC-PAD FRICTION COEFFICIENT FOR MECHANICAL BRAKE

초록

To stop the train safely within the limited traveling distance and reduce its speed to the desired speed, it is necessary to guarantee the proper braking force. The braking effort of mechanical brake is determined by many parameters. Out of these parameters, pressure and cross sectional area of brake cylinder and brake linkage ratio can be easily acquired from the specification of brake, but it is difficult to obtain friction coefficient data of braking material. The present study has suggested two new methodologies that can measure friction coefficient of braking material on the train’s real operating condition. These two methodologies are utilized to obtain the disc-pad friction coefficient for the disc brake of Korea High Speed Train (HSR350x).