Robotics
Quadruped Locomotion
ActivePublished: 9 September 2026Updated: 9 September 2026Published
Key
innovation
Robot movement on four legs, providing greater stability and a lower center of gravity than bipedal designs, with the ability to traverse challenging terrain.
Category
Robotics
Abstraction level
System
Operation level
Robot control
Use cases
Industrial and infrastructure inspectionTraversing rough terrainSearch-and-rescue missionsLoad transport in the field
How it works
A controller coordinates the step sequences (gaits) of the four legs, keeping the center of mass over the support polygon (static stability) or managing dynamics at higher speeds; it uses proprioception and feedback, increasingly with learned (RL) policies.
Problem solved
Providing stable, versatile movement over difficult terrain where wheels fail and bipedal designs are less stable.
Key mechanisms
Static and dynamic gaits
Support polygon and static stability
Proprioceptive feedback
Learned control policies (RL)
Strengths & limitations
Strengths
✓Greater stability than bipedal robots
✓Low center of gravity
✓Ability to traverse challenging terrain
Limitations
✗More complex mechanics and control than wheels
✗Higher energy consumption
✗Speed and payload limits versus wheeled vehicles