実行可能領域：支持領域の駆動能力を考慮した拡張
Feasible Region: an Actuation-Aware Extension of the Support Region
脚式ロボットの静的安定性を、転倒・滑り回避に加えて関節トルク限界も考慮して保証する「実行可能領域」を定義し、HyQロボットで10kgの荷物を運びながら障害物を越える実験に成功した。
著者: Romeo Orsolino, Michele Focchi, Stéphane Caron, Gennaro Raiola, Victor Barasuol, Claudio Semini
分類: cs.RO
原文アブストラクト
In legged locomotion the projection of the robot Center of Mass (CoM) being inside the convex hull of the contact points is a commonly accepted sufficient condition to achieve static balancing. However, some of these configurations cannot be realized because the joint torques required to sustain them would be above their limits (actuation limits). In this manuscript we rule out such configurations and define the Feasible Region, a revisited support region that guarantees both global static stability in the sense of tipover and slippage avoidance and of existence of a set of joint-torques that are able to sustain the robot body weight. We show that the feasible region can be employed for the selection of feasible footholds and CoM trajectories to achieve static locomotion on rough terrains, also in presence of load intensive tasks. Key results of our approach include the efficiency in the computation of the feasible region thanks to an Iterative Projection algorithm. This allowed us to carry out successful experiments on the HyQ robot, that was able to negotiate obstacles of moderate dimensions while carrying an extra 10 kg payload.
