A novel task-oriented framework for dual-arm robotic assembly task
Zhengwei WANG1, Yahui GAN1(), Xianzhong DAI1
1. School of Automation, Southeast University, Nanjing 210096, China 2. Key Laboratory of Measurement and Control of Complex Systems of Engineering, Ministry of Education, Nanjing 210096, China
In industrial manufacturing, the deployment of dual-arm robots in assembly tasks has become a trend. However, making the dual-arm robots more intelligent in such applications is still an open, challenging issue. This paper proposes a novel framework that combines task-oriented motion planning with visual perception to facilitate robot deployment from perception to execution and finish assembly problems by using dual-arm robots. In this framework, visual perception is first employed to track the effects of the robot behaviors and observe states of the workpieces, where the performance of tasks can be abstracted as a high-level state for intelligent reasoning. The assembly task and manipulation sequences can be obtained by analyzing and reasoning the state transition trajectory of the environment as well as the workpieces. Next, the corresponding assembly manipulation can be generated and parameterized according to the differences between adjacent states by combining with the prebuilt knowledge of the scenarios. Experiments are set up with a dual-arm robotic system (ABB YuMi and an RGB-D camera) to validate the proposed framework. Experimental results demonstrate the effectiveness of the proposed framework and the promising value of its practical application.
Graph representation of a target and its obstacles
Limitation conditions
Set of pairs of actions and its corresponding parameters
Nodes of a graph
General representation of the workpieces
( )
Instance of a type of workpiece
Parameter list
World state that interested at a time point
State representation for workpieces
World physical properties
World state that interested
Destination of the world state
Initial world state
A series of transitions in world state
Mechanisms that drive the world changes
Abbreviations
AERM
Assembly environment representation model
AI
Artificial intelligence
FSA
Functional sequence of actions
STRIPS
Stanford Research Institute Problem Solver
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