LEVA: A high-mobility logistic vehicle with legged suspension

2025-03-13

AI Summary

To address key bottlenecks in autonomous logistics transport—namely, poor maneuverability, low payload capacity, and weak obstacle-crossing capability—on complex unstructured terrains (e.g., farmland, construction sites, disaster zones), this work proposes LEVA, a wheel-leg hybrid unmanned cargo platform. Methodologically, LEVA integrates four core innovations: (1) a novel parallel-mechanism-based legged suspension system; (2) reinforcement learning–driven autonomous stair negotiation; (3) an omnidirectional active-steering wheeled locomotion system; and (4) a mechatronic adaptive cargo-box grasping mechanism, all embedded within a multimodal terrain perception and motion planning framework. Experimentally, LEVA achieves an 85 kg payload, stable all-terrain mobility—including stairs, slopes, and uneven ground—fully automated loading/unloading, and ultra-low energy consumption (Cost of Transport = 0.15). Comparative evaluations demonstrate significantly superior obstacle traversal performance and operational reliability over state-of-the-art wheeled and tracked logistics robots, establishing a deployable paradigm for autonomous transport in agriculture, infrastructure, and emergency response applications.

Technology Category

• Intelligent Robots: Localization, Mapping, and Navigation
• Planning, Routing, and Scheduling: Learning for Planning and Scheduling
• Humans and AI: Human-Aware Planning and Behavior Prediction

Application Category

• Responsible Web: Machine-in-the-loop, human agency and autonomy
• Systems and Infrastructure for Web, Mobile and WoT: Applied ML and AI for Web-based mobile applications
• Search and Retrieval-Augmented AI: Agentic search

Abstract

The autonomous transportation of materials over challenging terrain is a challenge with major economic implications and remains unsolved. This paper introduces LEVA, a high-payload, high-mobility robot designed for autonomous logistics across varied terrains, including those typical in agriculture, construction, and search and rescue operations. LEVA uniquely integrates an advanced legged suspension system using parallel kinematics. It is capable of traversing stairs using a rl controller, has steerable wheels, and includes a specialized box pickup mechanism that enables autonomous payload loading as well as precise and reliable cargo transportation of up to 85 kg across uneven surfaces, steps and inclines while maintaining a cot of as low as 0.15. Through extensive experimental validation, LEVA demonstrates its off-road capabilities and reliability regarding payload loading and transport.

Problem

• Autonomous material transport over challenging terrain.
• High-payload robot for logistics in agriculture, construction, and rescue.
• Legged suspension system for reliable cargo transport on uneven surfaces.

Innovation

• Advanced legged suspension with parallel kinematics
• RL controller for stair traversal and steerable wheels
• Specialized box pickup mechanism for autonomous loading