On-Orbit Robotic Grasping of a Spent Rocket Stage: Grasp Stability Analysis and Experimental Results
Open Access
- 17 June 2021
- journal article
- research article
- Published by Frontiers Media SA in Frontiers in Robotics and AI
Abstract
The increased complexity of the tasks that on-orbit robots have to undertake has led to an increased need for manipulation dexterity. Space robots can become more dexterous by adopting grasping and manipulation methodologies and algorithms from terrestrial robots. In this paper, we present a novel methodology for evaluating the stability of a robotic grasp that captures a piece of space debris, a spent rocket stage. We calculate the Intrinsic Stiffness Matrix of a 2-fingered grasp on the surface of an Apogee Kick Motor nozzle and create a stability metric that is a function of the local contact curvature, material properties, applied force, and target mass. We evaluate the efficacy of the stability metric in a simulation and two real robot experiments. The subject of all experiments is a chasing robot that needs to capture a target AKM and pull it back towards the chaser body. In the V-REP simulator, we evaluate four grasping points on three AKM models, over three pulling profiles, using three physics engines. We also use a real robotic testbed with the capability of emulating an approaching robot and a weightless AKM target to evaluate our method over 11 grasps and three pulling profiles. Finally, we perform a sensitivity analysis to demonstrate how a variation on the grasping parameters affects grasp stability. The results of all experiments suggest that the grasp can be stable under slow pulling profiles, with successful pulling for all targets. The presented work offers an alternative way of capturing orbital targets and a novel example of how terrestrial robotic grasping methodologies could be extended to orbital activities.Keywords
Funding Information
- UK Research and Innovation (EP/R026092 “FAIR-SPACE Hub”)
This publication has 28 references indexed in Scilit:
- Review and comparison of active space debris capturing and removal methodsProgress in Aerospace Sciences, 2015
- The OOS-SIM: An on-ground simulation facility for on-orbit servicing robotic operationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2015
- An overview of 3D object grasp synthesis algorithmsRobotics and Autonomous Systems, 2012
- Autonomous rendezvous and robotic capturing of non-cooperative target in spaceRobotica, 2009
- Advancements in design of an autonomous satellite docking systemPublished by SPIE-Intl Soc Optical Eng ,2004
- Dynamics, control and impedance matching for robotic capture of a non-cooperative satelliteAdvanced Robotics, 2004
- DLR's robotics technologies for on-orbit servicingAdvanced Robotics, 2004
- On the stability of grasped objectsIEEE Transactions on Robotics and Automation, 1996
- Friction, Stability and the Design of Robotic FingersThe International Journal of Robotics Research, 1986
- Canadarm and the space shuttleJournal of Vacuum Science & Technology A, 1983