1. University of Illinois Urbana-Champaign,Dept. of Aerospace Engr.,Urbana,IL,USA,61801
2. The University of Illinois Urbana-Champaign,Dept. of Mech. Sci. and Engr.,Urbana,IL,USA,61801
3. The University of Illinois Urbana-Champaign,Coordinated Sci. Lab.,Dept. of Aerospace Engr.,Urbana,IL,USA,61801