1. Lecturer, School of General Aviation, Nanchang Hangkong Univ., Nanchang 330063, China. ORCID:
2. Lecturer, Dept. of Aerospace Engineering, Swansea Univ., Swansea, Wales SA2 8PP, UK. ORCID:
3. Professor, National Key Laboratory of Helicopter Aeromechanics, Nanjing Univ. of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China (corresponding author).