Dr. Cheng’s major research interests in the past few years focus on collaborative and exoskeleton robots and cyber-physical systems with the concentration in three major areas: smart path planning for collaborative robots, multiaxial control of exoskeleton robotic devices, information restoration of artificial skin for robotic systems, and safety and interaction between human and machines. The goal of smart path planning for collaborative robotic devices, it allows robots to avoid possible collisions with human workers in the same workspace. For the multiaxial control system, our research group is the first to integrate Adaptive Robust Control theory with cross-coupled dynamics. The method enables an exoskeleton robotic system to achieve a precise tracking performance regardless of perturbated forces. In the development and data restoration of artificial skin, a resolution enhanced technique has been proposed to greatly improve the measurement quality of the adopted sensor array. All these researches related to operational safety and interaction between human workers and robotic devices.