Umerujan Sawut

Kyushu Institute of Technology, Nikki-Universal (Japan)

Papers

Total Citations

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About

Umerujan Sawut is a researcher whose work centers on the control of robotic systems, with a particular focus on vibration suppression and friction compensation in flexible and rigid robot arms. His major contributions lie in the application of advanced nonlinear control and observer techniques. In his most cited work, "Frictionless control of robot arm with sliding mode observer" (2002, 12 citations), Sawut addressed the critical challenge of compensating for both friction and the spring effect in harmonic gears to achieve smooth, frictionless joint control. He further advanced the field by applying a Variable Structure System (VSS) nonlinear observer, combined with a simultaneous perturbation stochastic approximation method, to actively dampen oscillations in single-link flexible arms (2008, 4 citations). By integrating robust sliding mode observers with stochastic optimization, Sawut’s research provides practical pathways for improving the precision and reliability of industrial robot manipulators, making his work a valuable reference for engineers tackling real-world control challenges in flexible and high-precision robotics.