2010
DOI: 10.1017/s0263574710000597
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Rotational Stability Index (RSI) point: postural stability in planar bipeds

Abstract: The postural stability of bipedal robots is investigated in perspective of foot-rotation during locomotion. With foot already rotated, the biped is modeled as an underactuated kinematic structure. The stability of such biped robots is analyzed by introducing the concept of rotational stability. The rotational stability investigates whether a biped would lead to a flat-foot posture or the biped would topple over. The rotational stability is quantified as a ground reference point named "rotational stability inde… Show more

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