A Decomposed Co-design Strategy for Continuously Variable Transmission Design

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This paper presents a decomposed co-design optimization framework to jointly design the geometry and the controller of a Continuously Variable Transmission (CVT), accounting for its low-level dynamics. Specifically, we first devise a model of the CVT and the feedback controller, and use it to formulate the optimal co-design problem with the goal of minimizing the transmission's mass as well as the losses that occur in the system, including the lower-level actuation. Second, we divide the resulting nonlinear multi-objective optimization problem into separate hierarchical optimization subproblems and we leverage the concept of Analytical Target Cascading (ATC) to solve the separate optimization subproblems using an interior-point optimization algorithm. Finally, we showcase our framework on a representative drive cycle.
Our results demonstrate that the presented co-design method can achieve a more compact CVT design without compromising the desired ratio trajectory, and even reducing the overall losses.
Original languageEnglish
Title of host publicationAmerican Control Conference 2021
Publication statusSubmitted - 28 Sep 2020
Event2021 American Control Conference - New Orleans, United States
Duration: 26 May 202128 May 2021


Conference2021 American Control Conference
Abbreviated titleACC 2021
CountryUnited States
CityNew Orleans
Internet address

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    Fahdzyana, C. A., Salazar, M., & Hofman, T. (2020). A Decomposed Co-design Strategy for Continuously Variable Transmission Design. Manuscript submitted for publication. In American Control Conference 2021