Abstract:  The complex coupling relationship among tasks, serious rework, and chaotic design process existed in the collaborative design of gear transmission systems, in order to solve the problems, a global-local two-level task planning method based on the fussy design structure matrix (FDSM) was proposed. First, the design tasks were decomposed according to the hierarchical structure of task decomposition, the FDSM was modeled in the light of the input-output relationship between design tasks. The coupled design tasks were identified and the uncoupled design tasks were planned through the transformation of FDSM-s ranks to achieve global planning. Secondly, the fuzzy coupling degree was introduced to quantify the strength of coupling between design tasks, and the inputs and outputs of each task in the coupling set were calculated to complete the coupling decoupling of task sets and enable local planning. Finally, taking the collaborative design of gear transmission system as an example, the whole planning process was explained, and the feasibility of the proposed method was verified. The results show that the complexity of FDSM is reduced by 35.32% and the number of design iterations is reduced. The automatic recognition of concurrent design task sets is realized, and the execution order of design tasks is optimized, the design time is shortened, and the basis for collaborative design task allocation is provided.

Key words:  gear transmission; collaborative design; mission planning; fussy design structure matrix(FDSM); coupling

LIU Wen-lin, MA Ya-li, LI Sheng-jia, et al. Task planning algorithm for collaborative design of gear transmission system［J］.Journal of Mechanical & Electrical Engineering, 2021,38(9):1132-1137,1159.