Mobile Robotic Mechanisms and Locomotion Dynamics
Summary
Mobile robotic mechanisms integrate mechanical design, control theory and dynamic analysis to accomplish reliable motion across diverse environments. This field encompasses wheeled platforms, legged walkers, rolling and tumbling machines, and shape-morphing linkages, each exploiting kinematic redundancy and dynamic stability principles. Key topics include gait planning, zero moment point stability, centre-of-mass trajectory optimisation and energy-efficient control to balance speed, manoeuvrability and power consumption. Recent innovations in single-actuator gear-drive systems, variable-diameter wheels and closed-chain linkages have broadened operational capabilities, enabling robots to climb steep surfaces, traverse uneven terrain and reconfigure to overcome obstacles. Such advances drive transformative applications in industrial inspection, search and rescue, and planetary exploration.
Research from Nature Portfolio
Recent studies have introduced a gear-type mobile mechanism actuated by a single motor, utilising cylindrical, bevel and non-cylindrical gears to transmit motion across parallel, intersecting and staggered axes. Screw theory was employed to determine degrees of freedom, while centre-of-mass trajectory adjustments and zero moment point modelling improved stability and prevented counter-rotation during steep-surface traversal. Simulation and prototype testing confirmed that this design achieves continuous, flexible locomotion with high stability, offering a compact and efficient solution for challenging terrain navigation.
Mobile Robotic Mechanisms and Locomotion Dynamics publication trend
The graph below shows the total number of articles in mobile robotic mechanisms and locomotion dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Degree of freedom: Number of independent parameters required to uniquely determine a mechanism’s configuration.
Zero moment point: Point on the support surface at which the net moment due to inertia and gravity forces is zero, used as a stability criterion.
Centre of mass: Single point representing the mean position of all mass in a system, critical for balance and motion analysis.
Gait planning: Process of determining a sequence of link or joint movements to achieve a desired locomotion pattern.
Parallel mechanism: Robot structure in which the end-effector is connected to the base by multiple independent kinematic chains operating in parallel.
Reconfigurable linkage: Mechanical system capable of altering its geometry or connectivity to adapt to different tasks or environments.
References
- Design and motion analysis of a new wheeled rolling robot. Mechanical Sciences (2024).
- Design and stability analysis of the gear-type mobile mechanism with a single actuator. Scientific Reports (2024).
- Gait planning of a 4–5R rolling mechanism based on the planar 6R single-loop chain. Mechanical Sciences (2024).
- Energy Consumption Analysis of a Rolling Mechanism Based on a Five-Bow-Shaped-Bar Linkage. Applied Sciences (2022).
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