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Approach to Application of Executable Specifications in Development of Automatic Transmission Control Software

Article of Honda R&D Technical Review Vol.21 No.2


Model-based development is being introduced to the development of control software for automatic transmissions in order to increase control reliability and reduce development times. The introduction of model-based development necessitates an enhancement in the readability of executable specifications formulated using MATLAB, i.e., specifications for simulatable models, and the reduction of the time for formulation of these specifications. An original style guide was developed as a supplement to the general description guidelines provided by the MAAB and J-MAAB style guides, and the like, on the basis of a method eschewing connecting lines and division of the model based mainly on Stateflow, and post-processing was applied to the expression of the model when documents were formulated. These methods increased the readability of the specifications. In addition, a block library for automatic transmission control, an automatic modeling tool conducting routine processing, and a tool that automatically sets existing variable information were developed in order to support modeling conforming to the new style guide. These tools have reduced the time for modeling to less than one-twentieth of the time for manual modeling. This has enabled executable specifications to be employed in the development of automatic transmission control software.


(1) Ohtsuka, K., Oi, M.: Deployment of Model Based Development for Automotive Software, Journal of Society of Automotive Engineers of Japan, Vol. 60, No. 6, p. 80-85 (2006)
(2) Minowa, S., Hirota, T., Yokoyama, H., Ishiguro, T., Ohtsuka, S.: Autocoding of Power Plant Control Software, Honda R&D Technical Review, Vol. 16, No. 1, p. 243-248
(3) http://www.mathworks.com/industries/auto/maab.html
(4) http://j-maab.cybernet.jp/
(5) http://www.cybernet.co.jp/documents/pdf/products/magazine/cybernet_news/no87.pdf

Author (organization or company)

Yoshihiro MATSUYAMA(Automobile R&D Center)、Kenji HAGIWARA(Automobile R&D Center)、Satoshi SEINO(Automobile R&D Center)

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