1. University of Michigan,Robotics Department,Ann Arbor,MI,USA,48105
2. University of Michigan,Department of Electrical and Computer Engineering,Ann Arbor,MI,USA,48105
3. University of Michigan,Department of Ecology and Evolutionary Biology,Ann Arbor,MI,USA,48105
4. Virginia Tech,Department of Aerospace and Ocean Engineering,Blacksburg,VA,USA,24061