Robotics
Bipedal Locomotion
ActivePublished: 9 September 2026Updated: 9 September 2026Published
Key
innovation
Robot movement on two legs, requiring continuous active balance control — key for humanoid robots operating in human environments.
Category
Robotics
Abstraction level
System
Operation level
Robot control
Use cases
Humanoid robots in human environmentsClimbing stairs and narrow passagesWork in human-designed spacesResearch on dynamic balance
How it works
A controller continuously estimates the balance state (from accelerometers and gyroscopes, among others) and adjusts joint torques and foot placement to maintain dynamic stability while walking; learned (RL) policies are increasingly used.
Problem solved
Enabling robots (especially humanoids) to move through spaces designed for humans (stairs, narrow passages) while solving the difficult problem of maintaining balance.
Key mechanisms
Stability control (forward-backward)
Accelerometers and gyroscopes
Joint-torque and foot-placement control
Dynamic gait stability
Strengths & limitations
Strengths
✓Fits environments designed for humans
✓High mobility (stairs, obstacles)
✓Natural form for humanoid robots
Limitations
✗Very difficult balance control (instability)
✗Higher risk of falls than multi-legged/wheeled designs
✗High compute and energy requirements