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About

Hiroki Sone is a leading figure in space robotics, specializing in the dynamics and control of free-flying and fixed-base manipulators. His core research focuses on reaction null-space motion control, a critical technique for enabling a space robot to perform tasks—such as camera inspection—without disturbing its own base orientation or position. Sone’s major contributions include pioneering a task-space dynamics formulation for kinematically redundant manipulators, which directly addresses and alleviates joint-space instability problems that plague conventional motion/force controllers. His most cited work, “Reactionless camera inspection with a free-flying space robot under reaction null-space motion control” (2016, 15 citations), demonstrates a practical, high-impact application of this theory. Further studies (2015) reveal how a manipulator’s kinematic structure fundamentally governs its reactionless motion capability, providing essential design guidance for future space missions. By bridging theoretical dynamics with real-world orbital tasks, Sone’s research is foundational for the next generation of autonomous, non-propulsive space servicing and assembly.