Analytic Path Planning Algorithms for Bipedal Robots without a Trunk

This paper presents new path planning algorithms for bipedal robots without a trunk. The proposed methods can be regarded as an extension to the concept of the inverted pendulum mode (IPM). Further, they fill the gap between the IPM and concepts, based on general dynamic modeling. The swing leg motion is adjusted almost arbitrarily and the torso motion is calculated analytically in order to ensure stability. The proposed methods show a higher gait stability compared to literature approaches. This improvement is verified by measurement of the foot reaction forces during the walk of the existing biped BARt-UH and simulations.

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