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About

Dr. Cai’s research focuses on the design, modeling, and control of specialized mobile robots, with a particular emphasis on spherical and climbing robots for challenging environments. Their most influential work, "A Back-stepping Based Trajectory Tracking Controller for a Non-chained Nonholonomic Spherical Robot" (2008, 21 citations), addresses a critical challenge in spherical robotics: robust trajectory tracking for the BHQ-2 robot designed for unstructured, hostile environments. By deriving the dynamic model using simplified Boltzmann-Hamel equations and applying a back-stepping control method, Dr. Cai achieved global asymptotic tracking of linear and circular paths, validated through Lyapunov stability theory. This contribution is foundational for enabling spherical robots to operate autonomously in exploration and surveillance tasks. Additional notable work includes the design and analysis of a gecko-like climbing robot (2011, 9 citations) and a layered SOA-based architecture for multi-robot cooperative SLAM (2014, 6 citations), demonstrating versatility across bio-inspired and collaborative robotic systems. Dr. Cai’s research bridges theoretical control design with practical robot development, offering key insights for students and researchers in nonholonomic systems and field robotics.