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Fuzzy behavior integration and action fusion for robotic excavation

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3 Author(s)
Xiaobo Shi ; Adv. Min. Syst. Lab., Arizona Univ., Tucson, AZ, USA ; Lever, P.J.A. ; Fei-Yue Wang

This paper discusses control behavior integration and bucket action fusion for excavation control of a robotic front-end-loader type machine. To utilize the experience and expertise from skilled human operators, a fuzzy-logic based control approach is developed. A hierarchical excavation control architecture decomposes excavation goals to tasks, then tasks to behaviors, and finally behaviors to actions. The excavation actions are primitive and can be executed directly by an excavation machine. Finite state machines are used to specify the coordination and integration of behaviors for task execution and actions for behavior implementation. A simple strategy for action fusion is proposed based on fuzzy logic reasoning and the COA defuzzification method. Finally, laboratory experiments are conducted using a PUMA 560 robot arm and a Zebra force/torque sensor in a simulated rock excavation environment. Experimental results indicate that the proposed approach in this paper has led to more efficient task execution than previous approaches

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Industrial Electronics, IEEE Transactions on  (Volume:43 ,  Issue: 3 )