基于结构参数随机性的海洋平台振动模糊逻辑控制研究

基于刚度、质量和阻尼的随机性，用MonteCarlo直接抽样法对海洋平台的结构振动模糊控制进行了研究．随机不确定性通过结构参数、物理特性确定性均值附近的微小波动来模拟，根据提出的性能指标考察了结构刚度、质量和阻尼的随机性对海洋平台振动模糊控制效果的影响．结果表明，质量分布随机性对结构振动模糊逻辑控制效果的影响明显较刚度与阻尼要大．阻尼随机性对控制效果的影响最小．数值计算结果表明在结构参数随机变化的情况下，仍然能够对平台实现非常有效的结构控制，也同时表明了模糊逻辑控制器具有良好的鲁棒性。

Research on fuzzy logic control of structural vibration for offshore platforms based on random uncertainty factors

The fuzzy logic control of structural vibration for offshore platforms is focused, which considers the random uncertainty factors of stiffness, mass and damping using the Monte Carlo method. Uncertainties are modeled via the random fields that account for fluctuations of the physical properties of the structure around the mean that is conversely deterministic. The stochastic-based fuzzy control of structural vibration is accomplished with respect to the newly built criteria. It should be noted that the influence of mass is more significant than that of stiffness and damping, the damping is the least. The numerical results show a good performance of the fuzzy controller for all cases tested. In addition, the robustness of the fuzzy controller is also demonstrated through the numerical examples.