Kinematic Analysis of Bicycle Pedaling

Abstract

In this study, the kinematic equations are derived to describe the angles, velocities, and accelerations of the leg of bike rider when changing the height and angle of seat tube. These equations are useful to get the optimum seat position, (in separated study), for best performance and efficiency. The pedaling motion model was simulated as four-bar mechanism (the foot was not considered), and by using polar form of complex number notation to get the kinematic equations. These equations are agreed with MATLAB/Simulink/SimMechanics/Four-Bar Model, as well as, the graphical method. The derived equations (kinematic equations) can describe the crossed and open four-bar mechanism.