Journal
EPL
Volume 102, Issue 5, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1209/0295-5075/102/50007
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Funding
- National Natural Science Foundation of China [11104179]
- Shanghai Pujiang Program [12PJ1405400]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [SHDP201301]
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We experimentally study the dynamics of centimetric robots and their interactions with rotary gears through inelastic collisions. Under the impacts of self-propelled robots, a gear with symmetric teeth diffuses with no preferred direction of motion. An asymmetric gear, however, rectifies random motion of nearby robots which, in return, exert a torque on the gear and drive it into unidirectional motion. Rectification efficiency increases with the degree of gear asymmetry. Our work demonstrates that asymmetric environments can be used to rectify and extract energy from random motion of macroscopic self-propelled particles. Copyright (c) EPLA, 2013
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