Jessy W. Grizzle
Papers
106
Total Citations
7,604
H-Index
42
About
Jessy W. Grizzle is a pioneering figure in robotic locomotion and nonlinear control theory, whose work has fundamentally advanced the science of making bipedal robots walk, run, and balance with dynamic stability. Based at the University of Michigan, Grizzle is best known for developing the theory of **hybrid zero dynamics** and **virtual constraints**—mathematical frameworks that transform the notoriously complex, hybrid nature of legged locomotion into tractable control problems. His landmark 2010 book *Feedback Control of Dynamic Bipedal Robot Locomotion* (over 1,000 citations) remains the definitive reference in the field, while his work on the RABBIT and MABEL experimental platforms (538 and 348 citations, respectively) brought these theoretical advances into physical reality. His contributions extend from rigorous Lyapunov-based stability proofs for underactuated 3D robots to Control Lyapunov Function-based quadratic programs for handling actuator saturation, and more recently to state estimation for legged systems via invariant Kalman filtering. His research on the Cassie bipedal robot underscores his continuing influence on next-generation platforms. With thousands of citations across foundational and applied works, Grizzle's career represents an extraordinary bridge between elegant mathematical theory and robust real-world robotics.
Research Focus
Key Achievements
Top Papers
- 1Feedback Control of Dynamic Bipedal Robot Locomotion1,093 citations · 2010
- 2RABBIT: a testbed for advanced control theory538 citations · 2003
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- 5Models, feedback control, and open problems of 3D bipedal robotic walking324 citations · 2014
- 6Contact-aided invariant extended Kalman filtering for robot state estimation295 citations · 2020
- 7Asymptotically Stable Walking of a Five-Link Underactuated 3-D Bipedal Robot268 citations · 2009
- 8Stable walking of a 7-dof biped robot264 citations · 2003
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