Finding the coefficient of rolling friction using a pericycloidal pendulum

作     者：S Alaci F C Ciornei C Bujoreanu M C Ciornei I L Acsinte 

作者机构：'Stefan cel Mare' University of Suceava Romania Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania 'The University of Medicine and Pharmacy 'Carol Davila' Bucharest Romania 

出 版 物：《IOP Conference Series: Materials Science and Engineering》 

年 卷 期：2018年第444卷第2期

摘      要：The paper presents a method of establishing the coefficient of rolling friction by the study of the damped motion of a pericycloidal pendulum. The pericycloid is the curve described by a point belonging to a mobile circle, which is in pure rolling around a fixed circle, accomplishing an interior contact. For a pendulum with known inertial characteristics, mass and moment of inertia, the equation of motion is found starting from the assumption of a linear dependence between the friction torque and the normal reaction force from contact point. Using an experimental set-up, the law obeyed by damped angular amplitude versus time is found for a pericycloidal pendulum. The experimental data are compared to the theoretical ones, by superposition; thus, the value of coefficient of rolling friction is obtained. The values are in a good agreement with the ones from technical literature.