In context
By early 2025, industrial maintenance of large steel structures such as ship hulls, wind turbine towers, and nuclear containment vessels still relied heavily on manual high-altitude work, posing safety risks and efficiency limits. Wall-climbing robots using magnetic adhesion had emerged as a promising alternative, yet a systematic review of their key technologies was lacking. This comprehensive survey filled that gap, offering engineers a structured overview of design choices and application readiness.
What was reported
The article, authored by researchers from Huazhong University of Science and Technology, reviews magnetic adhesion wall-climbing robots across four areas: adsorption principles, functional design, autonomous navigation, and applications. It details four excitation methods: permanent magnet, electromagnet, electro-permanent magnet, and hybrid excitation. Permanent magnets offer strong adhesion without power but are hard to adjust; electromagnets allow continuous force control but risk power loss and heating; electro-permanent magnets switch on/off in milliseconds with low energy but lack continuous adjustability; hybrid systems combine electromagnetic flexibility with permanent-magnet safety, showing the best overall performance though with added complexity.
Functional designs are classified by locomotion mechanisms—wheeled, tracked, inchworm, legged, and hybrid—each with trade-offs in speed, obstacle crossing, and surface adaptability. The review also covers autonomous navigation and motion control in 3D, including perception, localization, planning, and control. Applications span welding, grinding, cleaning, painting, and non-destructive testing on ferromagnetic surfaces, with commercial adoption already underway in several sectors.
“Magnetic adhesion wall-climbing robots have the advantages of strong load capacity, high adsorption stability, low energy consumption, flexible configuration, and low operating noise.”
Why it mattered
This review provided a structured reference for engineers selecting adsorption and locomotion technologies for specific industrial tasks. By highlighting the trend toward hybrid excitation and the need for smarter autonomous control, it pointed to future research directions that could expand the safe, efficient use of wall-climbing robots in high-altitude manufacturing and maintenance, reducing human risk and operational costs.
Source: 《机器人》期刊 (robot.sia.cn) · Published 2025-01-15 · “磁吸附爬壁机器人研究进展及其应用探索”