Quadruped robot dog

Minimalist quadruped robot dog, a biomimetic robot used in inspection and rescue operations.

About this subject

Quadruped robots, inspired by the locomotion of dogs and horses, are among the most promising areas of biomimetic robotics. Unlike wheeled or tracked robots, they can traverse uneven terrain, climb stairs, and navigate rubble, making them ideal for industrial inspection, 3D mapping, and search and rescue operations. The most famous model is Spot, from Boston Dynamics, which since 2015 has been used in factories, nuclear plants, and even at Chernobyl to measure radiation levels.

Technically, these robots are equipped with LiDAR sensors, stereo cameras, and high-precision motors that enable agile movements and dynamic balance. Battery autonomy ranges from 1 to 4 hours, depending on load and terrain. Newer models, such as the Unitree GO1, offer more affordable options for research and development, with the ability to run at speeds up to 3.7 m/s.

The first functional quadruped robot was BigDog, released by Boston Dynamics in 2005, powered by gasoline and extremely noisy. Today's versions are electric, silent, and lighter, allowing applications in sensitive environments. Despite the high cost, Spot can cost up to $75,000, the technology is becoming cheaper with the entry of Chinese companies like Unitree. In the future, quadruped robots are expected to be used in logistics, property security, and even as domestic assistants.

The evolution of onboard artificial intelligence allows these robots to operate autonomously, learning to adapt to different obstacles without human intervention. This opens doors for applications in hazardous areas, such as pipeline and tunnel inspection, where human presence is dangerous. The combination of minimalist design and robust functionality makes quadrupeds a versatile platform for the next generation of automation.

Frequently Asked Questions

What is a quadruped robot used for?

Quadruped robots are used for industrial inspection, environment mapping, search and rescue, and surveillance. They can access hard-to-reach places that wheeled robots or humans cannot.

What is the difference between a quadruped robot and a humanoid robot?

Quadruped robots have four legs and move like animals, offering better stability on uneven terrain. Humanoids have two legs and are designed for human environments, but are less stable.

How much does a quadruped robot like Spot cost?

Boston Dynamics' Spot costs around $75,000. More affordable models, such as the Unitree GO1, start at about $2,000 depending on configuration.