SWATH船纵向运动模糊自适应控制

Fuzzy adaptive control of SWATH ship vertical motion

针对SWATH船载重不同和航行过程中由升沉运动引起的水线变化对船舶运动参数的影响提出了一种模糊自适应控制策略。为保证S W A T H船纵向运动稳定性,根据李雅普诺夫稳定性定理,对纵摇控制器提出了最优控制器设计,通过选用合适的权函数,保证S W A T H船的航行性能。仿真结果表明,模糊化自适应控制系统对于不同频率下的正弦波响应和不同海况下的耐波性响应都能具有良好的控制性能,解决了船舶在不同载重、不同水线下参数变化对控制器影响的问题。

In this paper,a fuzzy adaptive control method is proposed to solve a class of certain parameter changing system of ship seakeeping with waterline-varying induced by different loaded and heave motions.The optimal controller design for pitch motion based on the principle of Lyapunov stability method was designed to ensure the system stability.According to the SWATH ship shape analyzed,parameter changing coefficients of waterline-varying was described by a fuzzy description.Simulation results demonstrate the effectiveness of the approach.It can get well seakeeping control qualities in different sea way and set a solution to the overloaded control problems.