Gait trajectory generation for a five link bipedal robot based on a reduced dynamical model

In this paper, a simple trajectory generation method for biped walking is proposed. The dynamic model of the five link bipedal robot is first reduced using several biologically inspired assumptions. A sinusoidal curve is then imposed to the ankle of the swing leg´s trajectory. The reduced model is finally obtained and solved: it is an homogeneous 2^nd order differential equations with constant coefficients. The algebraic solution obtained ensures a stable rhythmic gait for the bipedal robot. It´s continuous in the defined time interval, easy to implement when the boundary conditions are well defined.