Session｜2026 JSAE Annual Congress (Spring)

Session No.17 Expansion of Digital Twin Technology with MBD I -From Digital Validation to Mass Production Technology- (OS)
May 27 Pacifico Yokohama North G318+G319 9:30-11:35
Chair: TBD

Contents: In order to expand digital twin technology using MBD, model development and distribution systems which ensure compatibility are important and they need a standard. The investigating committee on development & distribution of models by international standard description of JSAE has been investigated such a system mainly based on IEC61691-1 and IEC61691-6 (VHDL-AMS) and has been built a cloud computing environment. This OS provides activities aimed at utilizing digital twin technology from digital validation to mass production development, and it aims to make MBD a support technology forfurther innovation through collaboration between different organizations.
Committee: Model Based Development Committee
Organizer: Junichi Ichihara (Azapa), Toshiji Kato (Doshisha University), Kimitoshi Tsuji (Digital Twins), Osamu Seya (Institute of Science Tokyo), Tsunehiro Saito (AGC), Hiroki Ishikawa (Gifu University)

For presentations that will not be available video streaming after congress, a “✕” is displayed in the “Video” column, so please check.
No.	Video	Title･Author (Affiliation)
1	◯	Transition of Model-based Development Technology Technical Committee based on International Standard Description Junichi Ichihara (AZAPA) In this committee, we have discussed the distribution of models between OEMs and Tier 1, as well as between Tier 1 and Tier 2, based on the keywords of 'electricity' and 'heat,' while utilizing a model language described by international standards. We will now present the current transitions and an overview of our ongoing activities.
2	◯	Application of Description Models Based on the International Standard Language VHDL-AMS to Digital Validation Toshiji Kato (Doshisha University)･Kimitoshi Tsuji (Digital Twins)･Tsunehiro Saito (AGC)･Masahiro Okamura (JSOL) This paper introduces and provides an overview of model descriptions using VHDL-AMS for digital validation.
3	◯	Initiatives for Virtual Testing Using Digital Twins and Digital Authentication III -Comprehensive CO2 Reduction and New Manufacturing System- Kimitoshi tsuji (Digital Twins)･Tosiji kato (Doshisha University)･Tsunehiro Saito (AGC)･Masahiro Okamura (JSOL, INC.) In manufacturing, certification through actual testing has limitations due to the lack of reproducibility and the diversity of conditions. Therefore, this paper introduces an initiative aimed at certification through virtual testing, using a full-vehicle model of an EV as a tool for digital certification, which can be applied to off-cycle credits that will be implemented in 2030 and can also be used for vehicle performance development.
4	◯	Study and Proposal on OCC for Automotive Glass using EV Model (Third Report) -POC of Digital Authentication Protocol with EV Cabin Thermal Model - Part 2- Tsunehiro Saito (AGC)･Masahiro Okamura (JSOL)･Kimitoshi Tsuji (Digital Twins)･Toshiji Kato (Doshisha University) OCC (Off-Cycle Credit) is the important CO2 credit regulation. In the first and second reports, we reported the results of the OCC study using the EV cabin thermal model and the simulation of annual CO2 emissions from EV. In the third report, we compare the calculation method of the US OCC with the EV cabin thermal model.
5	◯	A Study on Implementing Model Traceability with Cryptographic Hash Functions Masahiro Okamura (JSOL)･Kimitoshi Tsuji (Digital Twins)･Toshiji Kato (Doshisha University)･Tsunehiro Saito (AGC) In recent years, test requirements have become increasingly complex, making it difficult to evaluate performance through physical testing alone, and simulation-based evaluation has gained attention. This paper introduces a traceability approach that uses cryptographic hash functions to ensure the authenticity of simulation models, and also presents verification results obtained in a simplified demonstration environment.