1. a School of Aerospace Engineering, Georgia Institute of Technology , Atlanta, GA, 30332-0150, U.S.A E-mail:
2. b Florida A&M University/Florida State University, Department of Mechanical Engineering , Tallahassee, FL, 32310, U.S.A. E-mail:
3. c Department of Mechanical and Aerospace Engineering , Florida Institute of Technology , Melbourne, FL, 32901, U.S.A. E-mail: