Transparency Oriented Virtual Coupling Design: New Approach and Application to a Novel Admittance Haptic Device

Authors:
Yanhe Zhu;Jizhuang Fan;Qinxin Meng;Jie Zhao;Hegao Cai
Affiliations:
School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China 150001 and State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, P.R. C ...;State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, P.R. China 150001;School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China 150001;State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, P.R. China 150001;State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, P.R. China 150001
Venue:
ICIRA '08 Proceedings of the First International Conference on Intelligent Robotics and Applications: Part II
Year:
2008

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Abstract

A novel admittance haptic device which has low inertia and high speed to guarantee the high force bandwidth for the haptic interaction system is presented. Friction wheel is used to implement a rapid adjustment of the velocity loop. According to the admittance character of the haptic interface, PI velocity feedback control is utilized in the haptic interaction system. By introducing the virtual coupling into the system, Llewellyn's stability criteria in circuit theory is used to derive the constraint conditions to guarantee the system's absolute stability. Furthermore the parameters of the virtual coupling are optimized oriented to high transparency of the system. Man-machine haptic interaction system is established with the novel admittance interface. The experimental results indicate that optimized virtual coupling guarantees the large range stability, as well as improving the transparency effectively.