Sensorless force estimation on fingertip with gravitational compensation for heavy-duty pneumatic tri-grasper robot

A., Irawan and Putra Azahar, M. I. and Hashimi, M. A. (2022) Sensorless force estimation on fingertip with gravitational compensation for heavy-duty pneumatic tri-grasper robot. In: Engineering Technology International Conference (ETIC 2022) , 7 - 8 September 2022 , Virtually hosted by Universiti Malaysia Pahang. pp. 1-5.. ISBN 978-1-83953-782-0

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The paper presents the proposed sensorless force estimator design for pneumatic robot fingertip by using gravitational compensation and pressure changed in pneumatic cylinder piston. The approach is done to replace the commercial force sensor that may be expensive for heavy-duty configuration. The formulation was done by considering the torque of robot's finger joint, finger dimension as well as its actuator and the different pressures in cylinder piston. The gravitational force is calculated from the geometry of the robot's finger as dynamic gain for the force of pneumatic cylinder. The proposed method is validated on a heay-duty pneumatic Tri-grasper Robot with the simple basic movement and blocked randomly by human barehand. The results show that the force output by the estimator is almost identical to the loadcell sensor that attached on the fingertip at about 2% error in average. The sensitivity is a bit low for small and fragile material but enough for heavy-duty application that generally with hard and rough surfaces.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: force estimation, force cylinder, gravity compensation, pneumatic robot
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Institute of Postgraduate Studies
Faculty of Electrical and Electronic Engineering Technology
Depositing User: Assoc.Prof Addie Irawan
Date Deposited: 13 Sep 2023 06:04
Last Modified: 13 Sep 2023 08:21
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