Quadruped robot dog

Quadruped robot dogs, like Boston Dynamics' Spot, are used in industrial inspections, search and rescue, and research, combining agility and autonomy.

About this subject

Quadruped robots with canine design represent a major advance in mobile robotics. Unlike wheeled or tracked robots, these devices can navigate rough terrain, climb stairs, and balance on unstable surfaces. The most famous model is Spot, from Boston Dynamics, released commercially in 2020. It weighs about 32 kg, carries up to 14 kg of payload, and operates for 90 minutes. Other examples include ANYmal from Swiss company ANYbotics, used in offshore inspections, and Unitree Robotics' Go1, which is more affordable and targeted at developers.

The history of quadruped robots dates back to the 1980s with the BigDog project, also by Boston Dynamics, funded by DARPA. Since then, evolution has been rapid: Spot can dance to music, open doors, and perform complex maneuvers thanks to reinforcement learning algorithms. Sensors such as cameras and lidar allow 3D mapping of the environment and obstacle avoidance. In industry, these robots are used for inspections in power plants, mines, and oil platforms, reducing risks for humans.

Applications in rescue include searching debris and hazardous areas, where the robot can carry cameras and gas detectors. In the military, they are tested for reconnaissance and logistics. Challenges remain: high cost (Spot costs about $75,000), limited battery life, and the need for specialized operators. Research into lighter materials, higher-capacity batteries, and artificial intelligence promises to make these robots more common in the future, including as home assistants.

Interestingly, the canine design is not just aesthetic: the four-legged morphology offers stability and redundancy. If one leg fails, the robot can continue operating with the other three. Moreover, the ability to lie down and stand up facilitates transport and concealment. With the evolution of locomotion algorithms, these robots can already run, jump, and even perform parkour, as demonstrated by Spot in viral videos.

Frequently Asked Questions

What is the most famous quadruped robot?

The Spot, from Boston Dynamics, is the most famous and was the first to be commercially available at scale starting in 2020.

What are robot dogs used for in industry?

They perform inspections in hazardous or hard-to-reach locations such as power plants, oil platforms, and mines, carrying cameras and sensors.

How much does a robot like Spot cost?

Spot is sold for approximately $75,000, but cheaper options exist like Unitree's Go1, which costs a few thousand dollars.