Meet X1: The Revolutionary Multi-Robot Team with Humanoid and Drone for Rescue Missions
Imagine a robot walking across a campus, carrying another robot on its back. This isn't a scene from a sci-fi movie; it's the groundbreaking X1 team, a multi-robot system designed to tackle rescue missions that are too risky or chaotic for humans. In a three-year project, engineers at the California Institute of Technology (Caltech) and the Technology Innovation Institute (TII) in Abu Dhabi have transformed these piggyback robots into a tightly coordinated team, where each machine focuses on the tasks it can do most effectively.
The X1 robot duo is a marvel of engineering, featuring a modified Unitree G1 humanoid that walks on two legs and can carry heavy gear. On its back rides a morphing robot, a device that changes shape depending on the demands of the mission. This unique combination of a humanoid and a drone allows X1 to navigate through tight spaces, manage stairs, and even take to the skies when needed.
The project brings together specialists from Abu Dhabi and Boston to ensure the seamless integration of the humanoid and the drone. At TII, engineers refine secure computing and tools that protect the robot hardware, while Northeastern researchers tune the mechanisms that enable the morphing robot to change configuration. This collaboration has resulted in a system that can sense its surroundings using cameras, lidar, and range finders, allowing the pair to localize themselves and plan routes through cluttered areas without joystick control.
During a recent demonstration, the X1 system showcased its capabilities by starting inside a campus lab, walking through a library, and reaching an elevated outdoor spot near Caltech Hall. The humanoid's ability to navigate tight hallways and doorways, and the morphing robot's ability to lift off from its back and transition to a drone mode, demonstrated the system's versatility and adaptability.
The X1 team is built for rescue, acting as a rapid first responder that can survey the scene before human crews arrive. The morphing robot, M4, is designed with locomotion plasticity, the ability to switch movement styles when conditions change. This flexibility allows M4 to roll, fly, crouch, and balance across obstacles that defeat simpler machines, making it a versatile tool for various rescue scenarios.
Aaron Ames, director of Caltech's Center for Autonomous Systems and Technologies, emphasizes the importance of X1's adaptability, stating, 'Right now, robots can fly, drive, and walk. But X1's unique combination of legs, wheels, and wings allows it to tackle complex environments and missions that single-purpose robots struggle with.'
The team is currently working on safety-critical control methods to ensure the robots' behavior remains safe even when sensors glitch. They aim to convince regulators and the public that X1 can be trusted in disaster zones, demonstrating long runs without crashes, clear decision-making processes, and emergency stops that humans can trigger if needed.
The Technology Innovation Institute's engineers provide secure onboard computers and flight controllers, enabling the M4 drone to make fast decisions locally. This capability is crucial when networks fail, and operators want reliable autonomous navigation, with the robot planning its movements instead of a human pilot.
As X1 continues to evolve, it holds the potential to revolutionize emergency response. With its ability to decide when to walk, drive, or fly, X1 could someday scout damaged buildings or carry supplies through flooded streets, all without putting people at risk. The future of rescue missions is here, and X1 is leading the way.
