Dr. Gridsada Phanomchoeng is an Associate Professor in the Department of Mechanical Engineering at Chulalongkorn University, Thailand. He received his M.S. in Aerospace Engineering and Mechanics and his Ph.D. in Control Science and Dynamical Systems from the University of Minnesota, USA. His research focuses on nonlinear observer design, state and parameter estimation, and unknown input estimation for nonlinear systems, with applications to intelligent vehicle systems, including rollover prevention, yaw stability, and friction estimation. He has developed a range of nonlinear estimation techniques for systems with Lipschitz and bounded Jacobian properties. In addition to vehicle safety applications, he is also conducting research on battery-less wireless sensor technologies for intelligent transportation systems. Dr. Phanomchoeng has a strong background in both theoretical control systems and experimental validation, with extensive publications and project experience in automotive control, mobility, and smart sensing. His current work continues to bridge advanced estimation theory with real-world engineering problems.