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About

Robert S. Stoughton is a pioneering roboticist whose work has fundamentally advanced the design and control of closed-chain, parallel-link manipulators. His research centers on kinematic structures, workspace analysis, and optimal sensor placement for high-precision robotic systems. Stoughton’s most influential contribution is the development of the ParaDex robot, a novel closed-chain, kinematically redundant manipulator that achieves high payload, high stiffness, and low inertia while expanding reachable workspace through a 7-degree-of-freedom design. His foundational 1987 paper on a 3-DOF closed-chain kinematic structure, cited 15 times, laid the groundwork for understanding geometric relationships, Jacobian properties, and singularities in such systems. His 2002 work on optimal sensor placement for forward kinematics in a 6-DOF parallel link manipulator, with 31 citations, remains a key reference for improving dexterity in Stewart-platform generalizations. Stoughton also contributed to automated force-controlled assembly using hexapod robots and developed a variable geometry truss manipulator for positioning large payloads in the Department of Energy’s Decontamination and Dismantling Robotics program. His innovations continue to influence modern robotics, particularly in applications demanding high precision and load capacity.