Impedance Identification Using Tactile Sensing and Its Adaptation for an Underactuated Gripper Manipulation

  • Zhong-Yi Chu
  • Shao-Bo Yan
  • Jian Hu
  • Shan Lu
Regular Paper Robot and Applications


Underactuated gripper has a broad application in the field of space robot and industrial robot because of its better shape-adaptation. However, because of the underactuated characteristics, it is a great challenge to accurately obtain the displacement of the contact point between the finger and grasped object, which makes it difficult to control the gripper grasp stably, especially the environmental parameters are unknown. This paper develops the identification of the unknown environmental parameters using a tactile array sensor based on the recursive leastsquares (RLS) method. The unknown environments are described as linear systems with unknown dynamics, and the environmental parameters are identified using the measured contact force and the derived displacement of the contact point which is obtained through the underactuated gripper dynamics. Meanwhile, an impedance adaptive control is presented to match the variability of the environment parameters, and the desired impedance model is imposed to the underactuated gripper to achieve stable grasp. A cost function that measures the contact force, velocity and displacement error is defined, and the critical impedance parameters are found to minimize it. At last, a co-simulation of ADAMS and MATLAB for an underactuated gripper grasp is implemented to show the feasibility of environmental parameters identification and its adaptive method.


Environmental parameters identification impedance adaptation stable grasp underactuated gripper 


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Copyright information

© Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Instrument Science and Opto-electronicsBeihang UniversityBeijingChina
  2. 2.Shanghai Institute of Spaceflight Control TechnologyShanghai Key Laboratory of Aerospace Intelligent Control TechnologyShanghaiChina

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