1. Department of Mechanical and Automation Engineering The Chinese University of Hong Kong HKCLR, 5-th floor, 17W, Hong Kong Science Park Hong Kong 999077 Hong Kong SAR
2. Hong Kong Center for Logistics Robotics HKCLR, 5-th floor, 17W, Hong Kong Science Park Hong Kong 999077 Hong Kong
3. Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Rm.707, Mechanics Building V, West Campus, USTC, Huangshan Rd. 443 Hefei Anhui Province 230027 China