Resolved Momenutm Control: Motion Generation of a Humanoid Robot based on the Linear and Angular Momenta

Abstract

We introduce a method to generate whole body motion of a humanoid robot such that the resulted total linear/angular momenta become specified values. First, we derive a linear equation which gives the total momentum of a robot from its physical parameters, the base link speed and the joint speeds. Constraints between the legs and the environment are also considered. The whole body motion is calculated from a given momentum reference by using a pseudoinverse of the inertia matrix. As examples, we generated kicking and walking motions and tested on an actual humanoid robot HRP-2. This method, the Resolved Momentum Control, gives us a unified framework to generate various maneuver of humanoid robots.