[1] Univ Colorado, Aerosp Engn Sci, Ctr Engn, 1111 Engn Dr,Room ECAE 197, Boulder, CO 80309 USA
[2] Univ Twente, POB 217, NL-7500 AE Enschede, Netherlands
[3] Univ Illinois, Urbana, IL 61801 USA
[4] Univ Calif Santa Cruz, Dept Appl Math & Stat, Santa Cruz, CA 95064 USA
[5] Univ Calif San Diego, Dept Mech & Aerosp Engn, San Diego, CA USA
[6] Univ Calif San Diego, Dept Mech & Aerosp Engn, San Diego, CA 92103 USA
[7] Tech Univ Catalonia, Appl Math, Barcelona, Spain
[8] Univ Illinois, Coordinated Sci Lab, 1101 W Springfield Ave, Urbana, IL 61801 USA
[9] UC Santa Barbara, Ctr Control Dynam Syst & Computat, Santa Barbara, CA USA