Ralph Hollis

A dynamically stable single-wheeled mobile robot with inverse mouse-ball drive

Tom Lauwers, George Kantor, Ralph Hollis · 2006 · 261 citations

Engineering, Mechanical Engineering, Robotics Engineering +15

A six-degree-of-freedom magnetically levitated variable compliance fine-motion wrist: design, modeling, and control

Ralph Hollis, Septimiu E. Salcudean, A. Peter Allan · IEEE Transactions on Robotics and Automation · 1991 · 195 citations

Engineering, Mechanical Engineering, Robotics Engineering +17

The ballbot: An omnidirectional balancing mobile robot

Umashankar Nagarajan, George Kantor, Ralph Hollis · The International Journal of Robotics Research · 2013 · 120 citations

Engineering, Mechanical Engineering, Robotics Engineering +17

State transition, balancing, station keeping, and yaw control for a dynamically stable single spherical wheel mobile robot

Umashankar Nagarajan, Anish Mampetta, George Kantor et al. · 2009 · 105 citations

Engineering, Mechanical Engineering, Robotics Engineering +17

What you can see is what you can feel-development of a visual/haptic interface to virtual environment

Yasuyoshi Yokokohji, Ralph Hollis, Takeo Kanade · 1996 · 102 citations

Architecture, Visualization, Computer Vision +16