Project start: 1.10.2025.

Modern power transmission systems must ensure high power density, compact design, and energy efficiency—requirements best met by planetary gear transmissions. Within this class, two-carrier single-speed planetary gear systems represent the simplest functional form of multi-carrier configurations, with strong potential for applications in industrial and mobile drives, including electromobility, aerospace, and robotics, where mass, space, and efficiency are critical parameters influencing system performance.

Despite their practical relevance, two-carrier single-speed transmissions remain underexplored. Research to date has focused on a limited number of basic configurations, while more complex arrangements have been largely neglected due to their kinematic complexity and the lack of systematic analysis methods. Moreover, much of the related knowledge is proprietary, and the number of available patents is limited, restricting open scientific progress and innovation.

This project aims to conduct a comprehensive investigation of all feasible configurations of two-carrier single-speed planetary transmissions. It will include classification based on kinematic and energetic characteristics, identification of achievable transmission ratios, and assessment of load capacity with respect to gear strength and wear. A novel comparative analysis methodology will be developed, supported by algorithmic tools for configuration generation and evaluation. Selected configurations will be experimentally tested on custom-built equipment under realistic operating conditions.

The project aligns with the Digital Croatia Strategy 2032 (OG 2/2023), particularly in the area of smart industry, automation, and digital engineering. It also supports the National Recovery and Resilience Plan of the Republic of Croatia, by enhancing research capacity, encouraging interdisciplinary collaboration, and promoting industrial knowledge transfer within green and digital transitions.