As the fundamental subsystem for mobile robots to achieve displacement, load bearing, and stable operation, the robot chassis plays a crucial role in the overall structure, supporting the upper functional modules, providing driving force and steering control, and ensuring operational safety and reliability. Its design and performance directly determine the robot's mobility, load level, and environmental adaptability in different application scenarios, thus it is considered the core basic unit of mobile intelligent agents.
Functionally, the robot chassis mainly consists of a load-bearing frame, a drive and steering system, a suspension and shock absorption structure, a power supply and communication interface, and necessary protective components. The load-bearing frame typically uses high-strength, lightweight materials, balancing structural rigidity and weight control to provide a stable mounting platform for upper modules such as sensors, computing units, and working devices. The drive and steering system can be wheeled, tracked, or legged, depending on the application requirements. Wheeled systems are the most common due to their high efficiency and ease of control. Differential drives, omnidirectional wheels, and multi-steering wheels can respectively meet the needs of flexible planar steering and complex path planning.
To achieve stable movement, the chassis must be equipped with effective suspension and shock absorption mechanisms to absorb vibrations from uneven ground or impact loads, protecting precision equipment and improving smoothness of movement. The power supply system typically employs high-energy-density battery packs, combined with power management and intelligent charging/discharging strategies to ensure continuous operating time and safety. The communication interface ensures real-time data exchange between the chassis and the upper-level control system and scheduling platform, supporting remote monitoring and task assignment. Protective components include dustproof, waterproof, and impact-resistant structures and temperature-adaptive designs, enabling the chassis to operate reliably in varying indoor and outdoor conditions.
In terms of performance characteristics, modern robot chassis emphasize high-precision positioning and dynamic control capabilities. Utilizing encoders, inertial measurement units, and multi-sensor fusion algorithms, the chassis can achieve centimeter-level or even higher precision in position feedback and path tracking. Combined with environmental perception technologies such as LiDAR or visual odometry, it can perform autonomous navigation, obstacle avoidance, and path replanning in structured or semi-structured environments, meeting diverse needs such as industrial inspection, logistics handling, security patrol, and special operations.
Safety and scalability are also crucial considerations in chassis design. Beyond hardware-level emergency stops, collision avoidance, and speed limiting mechanisms, software-level implementations such as zone restrictions, speed constraints, and multi-robot collaboration rules mitigate the risks of conflict during human-robot coexistence and parallel multi-robot operations. Modular architecture design facilitates rapid replacement of drive units, battery packs, or the addition of functional accessories as needed, enhancing the chassis's reusability and lifecycle value.
Overall, the robot chassis is not merely the mechanical foundation for mobility, but a comprehensive platform integrating drive, control, perception, and safety assurance. With advancements in intelligent navigation and power technologies, the chassis will continue to evolve towards higher precision, greater adaptability, and higher reliability, providing solid support for expanding the application boundaries and improving the operational efficiency of various mobile robots.
