Quadruped robot dog

Quadruped robot dog: learn about four-legged robots used in industrial inspection, search and rescue, and research.

About this subject

Quadruped robots, commonly known as robot dogs, are machines with four legs designed to traverse rough terrain and hard-to-reach areas inaccessible to wheeled or tracked vehicles. The most famous model is Boston Dynamics' Spot, commercially released in 2020. It weighs about 32 kg and can carry payloads up to 14 kg, running for approximately 90 minutes on a single battery charge. Equipped with sensors such as stereo cameras, LIDAR, and inertial measurement units, Spot can navigate complex environments autonomously, climb stairs, and recover from falls.

Besides Boston Dynamics, other companies like Unitree Robotics (with the Go1 model) and ANYbotics (ANYmal) also develop quadruped robots. These robots are used in pipeline and oil platform inspection, construction site monitoring, underground mine mapping, and even search-and-rescue operations after natural disasters. For instance, Spot has been deployed by the New York Police Department in hostage situations and by the U.S. Air Force for aircraft inspection.

Interestingly, the term "quadruped" comes from Latin "quattuor" (four) and "pedis" (foot). Unlike humanoid robots that mimic bipedal human movement, quadrupeds draw inspiration from animals like dogs and horses, offering greater stability on uneven ground. Their development has been boosted by reinforcement learning algorithms, enabling them to learn walking, running, and jumping without explicit programming of each movement.

In Brazil, quadruped robotics research is still emerging, with universities like USP and Unicamp studying locomotion on rough terrain and balance control. The high cost (Spot is priced around US$75,000) still limits widespread adoption, but prices are expected to drop over time, making this technology more accessible to small and medium-sized enterprises.

Frequently Asked Questions

What is the main application of quadruped robots?

Quadruped robots are primarily used in industrial inspection (pipelines, oil platforms), construction monitoring, underground mine mapping, and search-and-rescue operations in disaster areas where uneven terrain hinders traditional vehicles.

How much does a quadruped robot like Spot cost?

Boston Dynamics' Spot starts at around US$75,000. Models from other brands, such as the Unitree Go1, can be found from about US$12,000, depending on configuration.

Can quadruped robots be used in homes?

Although smaller versions like the Go1 exist, home use is still limited by cost and primarily industrial focus. However, Boston Dynamics offers Spot rentals for specific projects, and there are applications in entertainment and property security.