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Fuzzy Adaptive Control-based Real-time Obstacle Avoidance under Uncertain Perturbations
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics, Biomechanics. KTH MoveAbility Lab.ORCID iD: 0000-0001-8785-5885
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2020 (English)In: Proceedings ICARM 2020 - 2020 5th IEEE International Conference on Advanced Robotics and Mechatronics, Institute of Electrical and Electronics Engineers (IEEE) , 2020, p. 50-55Conference paper, Published paper (Refereed)
Abstract [en]

Dynamic Movement Primitives (DMPs) framework is a powerful approach to imitate motor skills, which has outstanding characteristics, such as convergence to the goal position and good imitation performance. Considering complex motion scenes of manipulators, such as changing the goal position or adding obstacles, the original DMPs framework is not sufficient for the requirements. In this paper, we propose a learning control-based hierarchical control strategy to adapt to new goal positions and avoid obstacles: the high-level learning scheme is targeted at imitating the motor skill and generating the optimization trajectory for obstacle avoidance; the lower-level control scheme focuses on the safety and stability of the robot's movement with unknown disturbances. Firstly, the enhanced DMPs framework is presented to imitate the trajectory from human demonstrations, where the novel DMPs can adapt to new goal position with the changing goal, and avoid single or multiple obstacles. Then, the fuzzy adaptive control method is employed to control redundant manipulators, where the fuzzy logic system (FLS) is incorporated to approximate an unknown nonlinear function term of the unknown disturbance. Finally, the effectiveness of the proposed learning-control strategy is demonstrated with simulation results. The results show that the developed hierarchical strategy has good performance for new goal adaptation and obstacle avoidance.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2020. p. 50-55
Keywords [en]
Agricultural robots, Fuzzy control, Fuzzy logic, Learning algorithms, Manipulators, Robotics, Dynamic movement primitives, Fuzzy-adaptive control, Hierarchical control, Hierarchical strategies, Human demonstrations, Real time obstacle avoidance, Safety and stabilities, Uncertain perturbations, Adaptive control systems
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-313540DOI: 10.1109/ICARM49381.2020.9195366ISI: 000728183800010Scopus ID: 2-s2.0-85092633146OAI: oai:DiVA.org:kth-313540DiVA, id: diva2:1669336
Conference
5th International Conference on Advanced Robotics and Mechatronics, ICARM 2020, Shenzhen, China, December 18-21, 2020
Note

Part of proceedings ISBN 9781728164793

QC 20220614

Available from: 2022-06-14 Created: 2022-06-14 Last updated: 2022-09-27Bibliographically approved

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Zhang, Longbin

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