Title :

Calibration and External Force Sensing for Soft Robots using an RGB-D Camera

Author(s) :

Zhang, Zhongkai [Auteur]
Deformable Robots Simulation Team [DEFROST ]
Petit, Antoine [Auteur]
Computational Anatomy and Simulation for Medicine [MIMESIS]
Dequidt, Jeremie [Auteur]
Deformable Robots Simulation Team [DEFROST ]
Duriez, Christian [Auteur]
Deformable Robots Simulation Team [DEFROST ]

Journal title :

IEEE Robotics and Automation Letters

Pages :

2356 - 2363

Publisher :

IEEE

Publication date :

2019-03-06

ISSN :

2377-3766

English keyword(s) :

Finite Element Method
Point cloud matching
Calibration
Force sensing
Soft robot
RGB-D camera

HAL domain(s) :

Informatique [cs]/Robotique [cs.RO]
Informatique [cs]/Modélisation et simulation
Informatique [cs]/Traitement des images [eess.IV]

English abstract : [en]

Benefiting from the deformability of soft robots, calibration and force sensing for soft robots are possible using an external vision-based system, instead of embedded mechatronic force sensors. In this paper, we first ...
Show more >Benefiting from the deformability of soft robots, calibration and force sensing for soft robots are possible using an external vision-based system, instead of embedded mechatronic force sensors. In this paper, we first propose a calibration method to calibrate both the sensor-robot coordinate system and the actuator inputs. This task is addressed through a sequential optimization problem for both variables. We also introduce an external force sensing system based on a real-time Finite Element (FE) model with the assumption of static configurations, and which consists of two steps: force location detection and force intensity computation. The algorithm that estimates force location relies on the segmentation of the point cloud acquired by an RGB-D camera. Then, the force intensities can be computed by solving an inverse quasi-static problem based on matching the FE model with the point cloud of the soft robot. As for validation, the proposed strategies for calibration and force sensing have been tested using a parallel soft robot driven by four cables.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189

Source :

Harvested from HAL