HRP-4

The HRP-4 is a lightweight, slim humanoid robotics platform developed for advanced research in human-robot collaboration and bipedal locomotion. Standing at 151 cm tall and weighing just 39 kg, it features 34 degrees of freedom, including 7 DOF per arm for precise object manipulation and 6 DOF per leg for stable walking. Equipped with low-power motors under 80W for enhanced safety around humans, it performs natural movements like waist twisting, one-footed balance, and dexterous five-fingered hand grasping. Cameras and microphones enable face recognition, object tracking, and voice command response. Designed as a successor to HRP-2 and HRP-3, HRP-4 supports indoor navigation in human environments, with flexible joints for athletic poses and tasks. Its compact, human-proportioned body facilitates safer interaction, object handling up to 0.5 kg per arm, and motion control software from AIST, accelerating humanoid R&D for practical applications like assistive work.