基于演化算法的液力耦合器自动建模及运行特性分析

Auto-modeling with Evolutionary Algorithm and Operation Characteristic Analysis for Marine Hydraulic Coupling

针对液力耦合器自动建模及运行特性分析问题,分析液力耦合器的动力学机理,采用一种新的演化建模方法,自动辨识液力耦合器动力学模型的结构及参数,设计并实现混合演化策略,得出拟合精度较高的显式模型。在动力学模型和已有的舰船动力装置性能仿真模型库的基础上,进行模型搭接和计算分析,研究液力耦合器在舰船并车推进装置并车、解列过程中的动态特性,以及液力耦合器油压变化曲线对动态过程特性的影响。结果表明,采用演化算法能够在给出的运算算子和参数范围内自动生成满足计算实时性和精度要求的液力耦合器动力学模型,在使用液力耦合器的舰船推进装置中,离合器的结合和脱开过程更加平缓,油压变化曲线的参数变化直接影响离合动态过程的时间和平稳性。分析结果可以作为液力耦合器性能优化的基础。

Aim to the auto-modeling and characteristic analysis of marine hydraulic coupling,the kinetic mechanism of hydraulic coupling is analyzed.A new modeling method based on evolutionary algorithm to identify the kinetic model structure and parameters of hydraulic coupling is focused on.The hybrid evolutionary strategy is designed and implemented,and the explicit model with high precision is obtained.Based on hydraulic coupling kinetic model and existing marine power plant performance simulation model library,the model integrated and computation is completed,the dynamic characteristic during engaging and disengaging process of marine combined diesel and diesel propulsion plant is studied,and the effect of oil pressure change curve to dynamic process performance is analyzed.The results show that evolutionary algorithm can auto-research space of operators and parameters,and the real-time and high precision kinetic model of hydraulic coupling can be obtained by using evolutionary algorithm.In marine propulsion plant which contain hydraulic coupling,the performance of clutches during engaging and disengaging process became more smoothness.The change of oil pressure curve effect the time and placidity of clutch’s dynamic process.The research results establish a base for the performance optimization of marine hydraulic coupling.