Longitudinal vibration analysis and active disturbance rejection decoupling control of marine anticorrosive coatings Hybrid Propulsion Screw

Abstract

The traditional manual methods of mixing paint, the construction process is difficult to ensure the quality and efficiency of the construction due to construction instability and error. To address this issue, we propose a novel approach to automatically mix and discharge marine anti-corrosion coatings using a Hybrid Propulsion Screw. The longitudinal vibration of the Hybrid Propulsion Screw (HPS) during operation is a critical factor that affects the mixing and discharge stability of anti-corrosion coatings. To analyze the vibration characteristics and stability of HPS during operation, we established a three-degree-of-freedom longitudinal vibration model of the HPS using the concentrated mass method and numerically solved it using the Runge-Kutta algorithm, and investigated the effects of external excitation and frequency on the longitudinal vibration of the system. Moreover, to reduce the fatigue damage caused by vibration, we introduced the Active Disturbance Rejection Decoupling Control (ADRDC) considering the nonlinear strong coupling relationship in HPS. And finally, we used the Fibonacci series to adjust the parameters of the Extended State Observer (ESO), and the simulation results demonstrate that our proposed approach is effective for controlling the longitudinal vibration amplitude of the system, which is of great significance for developing efficient and reliable screw stirring devices.