Jia-Meng Wu Xin Huang Cheng-Lin Liu A new predefined-time fractional-order sliding mode synchronization control scheme for multi-motor systems. 109307 2026 152 Commun. Nonlinear Sci. Numer. Simul. https://doi.org/10.1016/j.cnsns.2025.109307 db/journals/cnsns/cnsns152.html#WuHL26 streams/journals/cnsns