A fast detection method to solve mechanical interference problem in automatic transmission

Abstract

In the process of configuration synthesis of automatic transmission (AT), it is difficult to eliminate configurations with mechanical interference because the methods used to detect this problem are often not fast and accurate enough. In this paper, we propose a method to fast eliminate the mechanical interference results of ATs with planetary gear train (PGT). A unified digital model is proposed to represent ATs. The digital model can be automatically converted into matrix representation of the detection object. Then, the problem of mechanical interference detection can be transformed into planarity testing problem by matrix representation. Therefore, combining Hopcroft-Tarjan planarity testing algorithm and matrix representation enables fast detection of mechanical interference in AT. Taking some classical AT as examples, the implementation process is illustrated in detail and the accuracy of the results is verified. After testing, the average time taken for a single detection is 0.7913 ms, so it can be used to detect the results of large quantity configuration synthesis. Furthermore, this method can also be integrated in the AT mechanism intelligent design software to assist in the design.