Degrees of Freedom: 27 Actuators: 21
This simplified humanoid model, introduced in [1], is designed for bipedal locomotion behaviours. While several variants of it exist in the wild, this version is based on the model in the DeepMind Control Suite [2], which has fairly realistic actuator gains.
[1] [Synthesis and Stabilization of Complex Behaviors through Online Trajectory Optimization] (https://doi.org/10.1109/IROS.2012.6386025).