Junlan Cheng

North China Institute of Aerospace Engineering

Papers

Total Citations

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About

Junlan Cheng is a robotics researcher whose work focuses on the kinematics and error analysis of parallel robotic systems, particularly those with reduced degrees of freedom (DOF). His key research areas include the design, constraint mechanics, and precision limitations of lower-DOF parallel robots. Cheng’s most cited paper, “Uncompensatable error of four DOF parallel robot” (2011, 3 citations), addresses a critical challenge in robotics: the inherent design complexity arising from the interplay between structural and functional constraints in parallel mechanisms. He investigates how lower-DOF robots rely on strict geometrical constraints—such as the precise alignment of joint axes within and between limbs—to achieve their reduced mobility. His major contribution lies in identifying and characterizing “uncompensatable errors” that arise from these constraints, offering insights into the fundamental limits of precision in such systems. While his citation count is modest, Cheng’s work provides foundational understanding for researchers tackling error compensation and design optimization in parallel robotics, making it a valuable reference for students and engineers exploring the trade-offs between simplicity and accuracy in robotic mechanisms.