Yongjun Lei

Xi'an Technological University, China Academy of Space Technology

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About

Dr. Yongjun Lei is a robotics researcher whose work bridges adaptive control theory and practical pipeline inspection systems. His most influential contribution, "Tracking Control of Robotic Manipulators based on the All-Coefficient Adaptive Control Method" (2006), has accumulated 18 citations and addresses fundamental challenges in robotic manipulator precision. This work provides a foundation for adaptive control strategies that enable robots to maintain accurate tracking despite system uncertainties. Dr. Lei also advanced pipeline robotics through his 2021 study on modular design methodology, where he combined axiomatic design principles with IDEF functional modeling to solve the persistent problem of single-function, redundant structure in pipeline inspection robots. His approach enables systematic extraction of general modules, improving design efficiency and system versatility. Additionally, his 2009 work on nonlinear attitude control introduced a novel Lyapunov function based on quaternion feedback, allowing rigid body attitude tracking without velocity measurements while respecting actuator limits—a significant achievement for mobile robot stability under real-world constraints. Dr. Lei’s research demonstrates a consistent focus on making robotic systems more adaptive, modular, and robust, with applications ranging from industrial manipulators to autonomous pipeline inspection.