Movement Lab - Manoj Srinivasan

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We are interested in understanding the movement of things: humans, other animals, and machines.

Some central scientific questions are: Why do animals move the way they do? And how do they do it so well? We are interested in obtaining a simple and tractable, yet complete, theory of legged locomotion and sensorimotor control in humans and other animals -- a theory that will reliably predict how an animal will act in a novel situation (say, humans on the moon), how the animal will respond to perturbations (say, stepping on a banana peel), or how we should design better wearable robotics such as robotic prostheses and exoskeletons and other biomechatronic assistive devices. We use a mixture of mathematics, modeling, computation, and experiments.

The Movement Lab is located within the Department of Mechanical Engineering at the Ohio State University and is led by Manoj Srinivasan.

Recently, we hosted the Dynamic Walking Conference (2015) at Ohio State. This is the conference our lab attends most regularly.

Some recent articles.

-- Nidhi Seethapathi and Manoj Srinivasan. Step-to-step variations in human running reveal how humans run without falling. eLife, 8, e38371, 2019. Webpage for the paper + PDF Downloads.

-- Varun Joshi and Manoj Srinivasan. Walking crowds on a shaky surface: Stable walkers discover Millennium Bridge oscillations with and without pedestrian synchrony. Biology Letters, 14, 2018. Webpage for the paper + PDF Downloads.

-- Matthew L. Handford and Manoj Srinivasan. Energy-optimal human walking with feedback-controlled robotic prostheses: a computational study. IEEE Transactions on Neural Systems and Rehabilitation Engineering, 26, 1773-1782, 2018. Webpage for the paper + PDF Downloads. PDF

-- Matthew Handford and Manoj Srinivasan. Robotic lower limb prosthesis design through simultaneous computer optimizations of human and prosthesis costs. Article PDF + Supplementary Information, Nature Scientific Reports, 6, 19983, 2016.
A webpage for the paper with videos and more information.

-- Nidhi Seethapathi and Manoj Srinivasan. The metabolic cost of changing walking speeds is significant, implies lower optimal speeds for shorter distances, and increases daily energy estimates. Accepted with minor revision, 11, 20150486, 2015. Link to journal article. Link to Data (Dryad). Article PDF+Supplementary Appendix.
            Here is a webpage for the paper with videos and data.

-- Varun Joshi and Manoj Srinivasan. Walking on a moving surface: energy-optimal walking motions on a shaky bridge and a shaking treadmill reduce energy costs below normal, Proceedings of the Royal Society A, 20140662, 2015. Link to journal article.  PDF (preprint article+supplementary information).

-- Yang Wang and Manoj Srinivasan. Stepping in the direction of the fall: the next foot placement can be predicted from current upper body state in steady-state walking, Biology Letters, 10, 20140405, 2014. Link to journal article.    Link to Data (Dryad).   Article PDF+Supplementary Information.
See here for Media/Press articles on this paper.

-- Leroy Long and Manoj Srinivasan. Walking, running and resting under time, distance, and speed constraints: Optimality of walk-run-rest mixtures, J. Royal Society Interface, vol. 10, 2013. Journal Link.
Author Generated PDF (pre-final version). See media coverage.

-- Manoj Srinivasan. Fifteen observations on the structure of energy minimizing gaits in many simple biped models. J. Royal Society Interface, PDF with supplementary information, 8, 74-98, 2011. Journal link

Our research has been featured in a few popular science and news media, including the National Geographic Channel, the Discovery Channel, National Public Radio, New Scientist, etc. Please see the Press/MEDIA page for videos, audio, and articles about our work. But please see our papers if you want the full story.