Episode 137: Getting Two-Legged Robots Moving - Oluwami Dosunmu-Ogunbi

In this episode, Professor Oluwami Dosunmu‑Ogunbi explains how modern bipedal robots overcome stair‑climbing challenges by re‑introducing ankle actuation. Traditional designs locked the ankle joint, limiting foot placement and making stairs nearly impossible to negotiate. By mathematically optimizing ankle torque and allowing the robot’s torso—or center of mass—to rise with each step, the control algorithms achieve smoother, faster ascent while preserving balance. This bio‑inspired approach mirrors human gait, where ankle push‑off and torso elevation are critical for efficient locomotion, and it reduces computational load compared to flat‑ground assumptions.

Beyond pure motion, safety remains a core concern for upright robots. Dosunmu‑Ogunbi describes fail‑safe strategies that detect power loss or imminent tipping and trigger a controlled descent, similar to drone emergency landings. Integrated hand‑out mechanisms and giant red emergency stop buttons give operators immediate shutdown capability, preventing hazardous falls. Compared with wheeled, tracked, or quadruped platforms, humanoid robots offer unmatched reach and adaptability in cluttered home environments, yet they demand sophisticated balance and safety systems to be viable for everyday assistance.

The conversation also shifts to the human side of robotics: diversity and inclusion. As the first Black woman to earn a PhD in robotics at the University of Michigan, Dosunmu‑Ogunbi stresses that varied perspectives reduce bias in design, improve testing across demographics, and inspire the next generation. Outreach to under‑resourced schools, equitable DEI initiatives, and visible role models are essential to broaden the talent pool. A more inclusive robotics community will produce robots that truly serve all users, from home‑care stair‑climbers to industrial assistants, ensuring technology advances without perpetuating existing inequities.