1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, China
2. Key Laboratory of Fluid Power and Intelligent Electro-Hydraulic Control, Fuzhou University, Fuzhou, China
3. Sichuan Aerospace Shenkun Technology Company Limited, Sichuan, China
4. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, China