1. School of Electrical and Electronic Engineering, Nanyang Technological University,Singapore,Singapore,639798
2. Key Laboratory of Ultra-Precision Intelligent Instrumentation, Ministry of Industry and Information Technology, and the Center of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology,Harbin,China,150001
3. Harbin Institute of Technology,Department of Control Science and Engineering,Harbin,China,150001
4. State Key Laboratory of Robotics and Systems, Harbin Institute of Technology,Harbin,China,150001