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About

P. Gregorio is a robotics researcher whose work has made significant contributions to the field of legged locomotion, particularly in the design, control, and energy efficiency of electrically actuated hopping and running robots. Best known for developing the ARL Monopod — a planar one-legged robot capable of dynamically stable locomotion — Gregorio's research demonstrated that lightweight electric motors could power robust, autonomous legged machines at speeds previously thought to require more powerful actuation systems. His 1997 paper on the design, control, and energetics of the ARL Monopod, which achieved a then-record running speed of 4.3 km/h using only 80W DC motors, has garnered 242 citations and remains a foundational reference in dynamic legged robotics. Building on Raibert's control principles, Gregorio advanced model-based approaches to hopping locomotion, presenting optimized prismatic leg designs and energy minimization strategies that continue to influence robot design. With follow-up work in 2002 and 2005 further refining mechanical design and control frameworks, Gregorio's body of research has helped establish key benchmarks for electrically actuated legged systems, providing lasting guidance for engineers and researchers pursuing efficient, autonomous mobile robots.