A strategy transfer approach for intelligent human-robot collaborative assembly

Qibing Lv, Rong Zhang, Tianyuan Liu, Pai Zheng, Yanan Jiang, Jie Li, Jinsong Bao, Lei Xiao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

In small batch and customized production, human-robot collaborative assembly (HRCA) is an important method to deal with the production demand of new-energy vehicles, which have the characteristics of rapid change and growth of personal needs. However, due to the difficulty of reusing historical assembly knowledge, it can not be used to effectively guide new tasks. Aiming at the transfer problem of collaborative strategy, this paper first defines the robot participating in the cooperation as an agent with reinforcement learning (RL) and proposes a framework of HRCA based on transfer learning (TL-HRCA). It consists of three modules: HRCA strategy generation, similarity evaluation, and strategy transfer for realizing rapid design and verification of product assembly strategy. The strategy generation module aims to establish an intelligent mapping from task to collaboration strategy based on part features. Based on the evaluation of task similarity, the mobility evaluation model divides subtasks into similar and dissimilar categories. For similar subtasks, the adversarial discriminative domain adaption is constructed to quickly design the HRCA strategy in the target domain. However, for dissimilar subtasks, the RL agent is trained continuously to obtain a new HRCA strategy. Finally, an assembly case study of power lithium batteries is conducted, of which the results have shown that TL-HRCA can improve the assembly efficiency by 25.846% compared to the traditional pre-programming assembly.

Original languageEnglish
Article number108047
JournalComputers and Industrial Engineering
Volume168
DOIs
Publication statusPublished - Jun 2022

Keywords

  • Assembly strategy
  • Human-robot collaboration
  • Reinforcement learning
  • Similarity evaluation
  • Transfer learning

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

Cite this