1. Student, Mechanical & Aerospace Engineering Dept., School of Engineering, Univ. of Patras, 26500, Patras, Greece.
2. Engineer, BETA CAE Systems S.A., Thessaloniki, Greece.
3. Professor, Mechanical & Aerospace Dept., School of Engineering, Univ. of Patras, 26500, Patras, and FORTH/IACM, Greece (corresponding author).