The book "Robotics and Mechatronics" offers a comprehensive collection of technical articles selected from a variety of contributions presented at the fourth international symposium on robotics and mechatronics. This conference brought together experts from different fields to discuss the latest developments and trends in robotics and mechatronics. The included papers cover a wide range of topics, including mechanism design, modeling and simulation, kinematics and dynamics of multi-body systems, as well as control methods. Additionally, innovative approaches in navigation, motion planning, sensing, and actuation are addressed. The book is aimed at researchers and engineers who are tackling the challenges and opportunities in these dynamic disciplines.