船舶电力系统柴油机的小波基预测函数控制

针对传统预测函数控制所选取的基函数都是全局函数而不能根据对参考轨迹在不同时刻的逼近精度不同进行灵活设置,损害了预测时域的整体优化目标的问题,提出了一种基于小波函数的预测函数控制(PFC)方法,并以Morlet函数作为小波基函数设计了船舶电力系统柴油机调速系统的预测函数控制器。利用小波函数的局部性和多尺度分析特性,对基函数的个数和位置分布可灵活设置。理论分析和仿真都表明,与常规的PFC相比,所设计的小波PFC调速器具有更好的跟踪能力和较强的鲁棒性,能很好地抑制参数变化和外部扰动对系统的影响,有利于提高柴油机调速系统的控制精度,从而保持整个船舶电力系统的安全稳定。

PFC based on wavelet function for diesel engine of ship power system

As the basic functions of traditional PFC(Predictive Functional Control) are all global functions,they can not be flexibly set according to the approximation precision of the referential trajectory at different instants,which impairs the overall optimization of prediction domain.A predictive functional controller based on Morlet function is designed for the speed regulation system of diesel engine.The quantity and distribution of basic functions can be flexibly set by using the locality and multi-scale anal...