| The Active Heave Compensation (AHC) system for offshore deep-sea fishing cranestarts late, although carried out extensive research, but the research is not significant.Especially in the aspect of Active Heave Compensation control technology, the research isstill in simulation and experimental stage. Thus, we learn from the developing experiencefrom the advanced foreign products, then research and develop an active heave compensationcrane which has a high-performance detection system and high-precision control algorithms.With specific control policy to drive the hydraulic system, we reach the goal of generalizedheave motion compensation. so that the crane’s heave amplitude realizes a significantreduction compared with the heave motion of the ship. Consequently, it can overcome the badinfluence in adverse sea conditions due to the roll movement, heave movement and movementcoupled with each other, maintaining a relatively stable level. Such as the laying of submarinecables or pipelines, and deep-sea oil and gas exploration operations, thereby enhancing thesafety, effectiveness and efficiency of the operations in the deep sea.The research works include: environmental analysis of the impact of the Active HeaveCompensation system (wave), the principle of compensation analysis, the design of thehydraulic drive system and establish a corresponding mathematical model, the analysis ofselections of hardware characteristics and control strategy.This paper design a secondary unit of hydraulic system as the core driving mechanism ofthe active heave compensation system, using an embedded controller to compensate the heavemotion. Adaptive predictive control algorithm to achieve predictive control of the movementof the ship, using the conventional PID control and fuzzy PID cascade control structure tocompensate heave displacement of ship crane, and with the software of MATLAB, obtainmore good control effect, to provide a theoretical basis for the follow-up to the key issues. |
PDF Full Text Request