1. Department of Aerospace Engineering, Harbin Institute of Technology, Mechanical and Mechatronics Department at University of Waterloo, Waterloo, ON N2L 3G1, Canada
2. Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
3. Department of Aerospace Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China