Climbing Robots: Scaling Walls with Precision and Efficiency

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Robotics, Mechatronics and Intelligent Machines".

Deadline for manuscript submissions: 31 May 2025 | Viewed by 3083

Special Issue Editors


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Guest Editor
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510520, China
Interests: robot vision; SLAM; mobile robot

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Guest Editor
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510520, China
Interests: bioinspired robot; climbing robot
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Guest Editor
Institute of Intelligent Manufacturing, Guangdong Academy of Sciences, Guangzhou 510070, China
Interests: robotics; industrial robotics and automation; motion planning; motion control; force control technology

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Guest Editor
School of Control Science and Engineering, Shandong University, Jinan 250101, China
Interests: intelligent perception and navigation; robotics and embodied intelligence; control theory and applications

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Guest Editor
College of Big Data and Internet, Shenzhen Technology University, Shenzhen 518118, China
Interests: autonomous grasping and dexterous manipulation; sensing; data fusion and estimation for autonomous systems; visuo-tactile servoing control; vision, tactile based object recognition
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of climbing robots has become increasingly relevant as we seek innovative solutions for applications in inspection, maintenance, rescue operations, and the exploration of complex or hazardous environments. The challenges involved in designing robots that can scale vertical surfaces with precision, efficiency, and robustness are immense, encompassing disciplines from robotics and material science to intelligent perception and control systems. This Special Issue, “Climbing Robots: Scaling Walls with Precision and Efficiency”, invites original research and review articles that explore new concepts, methodologies, and technologies in the field of climbing robots.

Topics of Interest
We welcome contributions that address, but are not limited to, the following areas:

  • Mechanisms for Climbing Robots: Novel designs and actuation mechanisms for reliable surface adhesion and locomotion.
  • Material Innovations: Smart materials and surface coatings to enhance adhesion, reduce slippage, and improve durability.
  • Control Systems: Advanced control strategies, including adaptive and autonomous controls, for real-time adjustments to complex surfaces.
  • Sensing and Perception: Sensor integration for environmental awareness, navigation, and obstacle avoidance.
  • Energy Efficiency: Power management strategies and energy-efficient designs to enhance operational longevity.
  • AI and Machine Learning in Climbing: AI-driven decision-making processes for complex navigation and task execution.
  • Applications and Case Studies: Real-world applications of climbing robots, including in construction, inspection, maintenance, disaster recovery, and extraterrestrial exploration.

Dr. Weinan Chen
Dr. Haifei Zhu
Prof. Dr. Xuefeng Zhou
Prof. Dr. Chaoqun Wang
Prof. Dr. Qiang Li
Guest Editors

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Keywords

  • mechanisms for climbing robots
  • material innovations
  • control systems
  • sensing and perception
  • energy efficiency
  • AI and machine learning in climbing
  • applications and case studies

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Published Papers (4 papers)

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Research

23 pages, 5891 KiB  
Article
Multi-Indicator Heuristic Evaluation-Based Rapidly Exploring Random Tree Algorithm for Robot Path Planning in Complex Environments
by Wenqiang Wu, Chuixin Kong, Zhongmin Xiao, Qianping Huang, Mingfeng Yu and Zhiye Ren
Machines 2025, 13(4), 274; https://doi.org/10.3390/machines13040274 - 26 Mar 2025
Viewed by 205
Abstract
This paper introduces a multi-indicator heuristic evaluation-based rapidly exploring random tree (MIHE-RRT) algorithm to address the key challenges of robot path planning in complex environments. The core innovation lies in a novel dual optimization framework that combines Hammersley sequence sampling with a comprehensive [...] Read more.
This paper introduces a multi-indicator heuristic evaluation-based rapidly exploring random tree (MIHE-RRT) algorithm to address the key challenges of robot path planning in complex environments. The core innovation lies in a novel dual optimization framework that combines Hammersley sequence sampling with a comprehensive multi-indicator heuristic evaluation mechanism. The Hammersley sequence ensures uniform coverage of the configuration space, while the multi-indicator heuristic evaluation mechanism intelligently guides tree expansion through a three-dimensional evaluation system incorporating diversity, distance, and angle values. After generating the initial path, a pruning algorithm removes redundant points to produce an efficient and practical final path. Extensive experimental validation in four different environmental scenarios (semi-enclosed, maze, chaotic, and crowded) demonstrates that MIHE-RRT outperforms RRT (rapidly exploring random tree), IBi-RRT (improved bidirectional rapidly exploring random tree), and HB-RRT (halton biased rapidly exploring random tree) algorithms. Results show significant improvements in planning efficiency (54–88% reduction in execution time), path quality (15–24% shorter paths), and computational resource utilization (77–94% reduction in nodes). These excellent performance metrics not only prove MIHE-RRT’s advantages in complex environments but also make it particularly suitable for practical robot navigation applications requiring reliable and efficient path planning. Full article
(This article belongs to the Special Issue Climbing Robots: Scaling Walls with Precision and Efficiency)
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17 pages, 5812 KiB  
Article
Trajectory Tracking of a Wall-Climbing Cutting Robot Based on Kinematic and PID Joint Optimization
by Xiaoguang Liu, Zhenmin Wang, Jing Wu, Hongmin Wu and Hao Zhang
Machines 2025, 13(3), 229; https://doi.org/10.3390/machines13030229 - 12 Mar 2025
Viewed by 386
Abstract
Cutting is a crucial step in the industrial production process, particularly in the manufacture of large structures. In certain spatial positions, using a mobile robot, especially a wall-climbing robot (WCR) with adsorption function, is essential for carrying cutting torches to cut large steel [...] Read more.
Cutting is a crucial step in the industrial production process, particularly in the manufacture of large structures. In certain spatial positions, using a mobile robot, especially a wall-climbing robot (WCR) with adsorption function, is essential for carrying cutting torches to cut large steel components. The cutting quality directly impacts the overall manufacturing quality. Therefore, effectively tracking the cutting trajectory of wall-climbing cutting robots is very important. This study proposes a controller based on a kinematic model and PID optimization. The controller is designed to manage the robot’s kinematic trajectory, including the torch slider, through the kinematic modeling of the wall-climbing cutting robot (WCCR). The stability of the control law is proven using the Lyapunov function, which controls the linear and angular velocities of the WCCR and the motion speed of the cross slider. Simulations verify that the control law performs well in tracking both straight-line and circular trajectories. The impact of different control law parameters on straight-line trajectory tracking is also compared. By introducing PID optimization control, the controller’s anti-interference capabilities are enhanced, addressing the issue of motion velocity fluctuation when the WCCR tracks curved trajectories. The simulation and experiment results demonstrate the effectiveness of the proposed controller. Full article
(This article belongs to the Special Issue Climbing Robots: Scaling Walls with Precision and Efficiency)
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13 pages, 10799 KiB  
Article
Development of a Bicycle-like Magnetic-Wheeled Climbing Robot with Adaptive Plane-Transition Capabilities
by Yongjian Bu, Lide Dun, Yongtao Deng, Bingdong Jiang, Aihua Jiang and Haifei Zhu
Machines 2025, 13(2), 167; https://doi.org/10.3390/machines13020167 - 19 Feb 2025
Cited by 1 | Viewed by 399
Abstract
Although robots are increasingly expected to perform inspection tasks in three-dimensional ferromagnetic structural environments, magnetic-wheeled climbing robots face significant challenges in overcoming obstacles and transiting between planes. In this paper, we propose a novel bicycle-like magnetic-wheeled climbing robot, named BiMagBot, featuring two magnetic [...] Read more.
Although robots are increasingly expected to perform inspection tasks in three-dimensional ferromagnetic structural environments, magnetic-wheeled climbing robots face significant challenges in overcoming obstacles and transiting between planes. In this paper, we propose a novel bicycle-like magnetic-wheeled climbing robot, named BiMagBot, featuring two magnetic wheels that allow the adaptive adjustment of magnetic adhesion without the need for active control. The front wheel incorporates an arc tentacle mechanism that rotates a ring magnet to adjust the magnetic adhesion, while the rear wheel uses an eccentric shaft-hole design to facilitate a smooth transition of magnetic adhesion between surfaces. The magnetic forces acting on both wheels during transitions through concave corners were analyzed and discussed via simulations to elucidate the underlying principles. A prototype of the robot was developed and tested experimentally. The results show that the front and rear wheels can adjust the magnetic adhesion during the transition of corners with angles ranging from 90° to 315°. The robot only weighs 1.6 kg, but it can carry a weight of 2 kg with a speed of 0.9 m/s to transit across concave corners, demonstrating comprehensive capabilities in plane transition, ease of control, and load capacity. Full article
(This article belongs to the Special Issue Climbing Robots: Scaling Walls with Precision and Efficiency)
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18 pages, 2083 KiB  
Article
Topology-Aware Efficient Path Planning in Dynamic Environments
by Haoning Zhao, Jiamin Guo, Chaoqun Wang, Xuewen Rong and Yibin Li
Machines 2025, 13(1), 14; https://doi.org/10.3390/machines13010014 - 29 Dec 2024
Viewed by 869
Abstract
This study presents a path-planning approach toward efficient obstacle avoidance in dynamic environments. The developed approach features the awareness of the topological structure of the dynamic environment at a planning instant. It is achieved by employing a homology class path planner to generate [...] Read more.
This study presents a path-planning approach toward efficient obstacle avoidance in dynamic environments. The developed approach features the awareness of the topological structure of the dynamic environment at a planning instant. It is achieved by employing a homology class path planner to generate a set of non-homotopy global paths. The global paths are cast into tree structures separately and optimized by the developed sampling-based path-planning methods. This mechanism can adaptively adjust the optimizing step size according to the change in the dynamic environment, and the sampling module uses the Gaussian Mixture Model (GMM) Optimizer to control the sampling space. The approach seeks the globally optimal path as it maintains and optimizes homology classes of admissible candidate paths of distinctive topologies in parallel. We conduct various experiments in dynamic environments to verify the developed method’s effectiveness and efficiency. It is demonstrated that the developed method can perform better than the state of the art. Full article
(This article belongs to the Special Issue Climbing Robots: Scaling Walls with Precision and Efficiency)
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