Kenneth A. Loparo

Case Western Reserve University, Industrial Systems and Control (United Kingdom)

Papers

Total Citations

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About

Kenneth A. Loparo is a leading figure in control systems engineering, with his most influential work centered on the stabilization of robotic manipulators during physical interaction with rigid environments. His primary research areas include nonlinear control, impact dynamics, and hybrid impedance/time-delay control. Loparo’s major contribution is the development of a nonlinear bang-bang impact controller, which enables robots to seamlessly transition between free-space motion, impact, and constrained contact without requiring changes to control algorithms or gains. This innovation, detailed in his highly cited 2003 paper (55 citations), uses robust impedance control with negative force feedback to absorb collision forces and stabilize the system. His 2002 work (13 citations) further refined this approach, demonstrating how alternating control inputs can mitigate high-impact forces. With a combined citation count of 68 for these foundational papers, Loparo’s research has significantly advanced the safety and reliability of robotic contact tasks, making him a key contributor to the field of robot-environment interaction and a respected authority in nonlinear control theory.