Library service-robot navigation paper builds ROS 2 stack on Unitree Go2 Edu

Evidence notes
- The paper presents a ROS 2 autonomous-navigation system for a Unitree Go2 Edu quadruped operating in library aisles and cluttered reader spaces.
- The stack combines RTAB-Map, AMCL, EKF sensor fusion, Nav2 planning, A*, and DWA local avoidance.
Company context
Develops quadruped and humanoid robots, with strength in dynamic locomotion, vertically integrated hardware, and relatively low-cost commercial deployment. Unitree is one of the clearest examples of a legged robotics company moving from research visibility into real productisation and broader market distribution.