Purpose: This paper presents a comprehensive investigation into ship propeller shaft vibration control, aiming to enhance the stability and efficiency of maritime propulsion systems for smoother operation and optimized engine performance. Specifically, the study focuses on utilizing an H∞ Controller to mitigate vibrations and promote operational tranquility in maritime settings. Methods: The proposed approach integrates an H∞ Controller into the ship’s propulsion system to actively regulate propeller shaft vibrations. The methodology involves the development of a mathematical model to characterize the dynamic behavior of the propulsion system. Subsequently, simulation studies are conducted to evaluate the efficacy of the H∞ Controller in vibration reduction. Experimental validation is performed using real-world data obtained from physical setups, ensuring the robustness and reliability of the proposed approach for MR damper. Results: Comparative analysis between the proposed active control system and conventional passive systems reveals significant reductions in propeller shaft vibrations. Specifically, the H∞ Controller system achieves an average vibration reduction of 48% across varying operational conditions. Simulation results demonstrate that the H∞ Controller effectively suppresses vibrations within specified frequency ranges, with peak vibration levels reduced by up to 57.98%. Experimental validation further confirms the superior performance of the H∞ Controller system, with measured vibration levels consistently below industry standards. Conclusion: This study highlights the efficacy of utilizing an H∞ Controller for ship propeller shaft vibration control to improve the stability and efficiency of maritime propulsion systems. By effectively mitigating vibrations, the proposed approach contributes to smoother operation and optimized engine performance. These findings highlight the potential of advanced control methodologies in enhancing the operational reliability and effectiveness of maritime systems.