船舶电站柴油机最小熵H_∞调速控制器的设计

Design for Diesel Engine Speed Regulation Controller of Ship Power Station Based on Minimum Entropy H_∞ Control

为了提高柴油机调速系统的动态精确度,抑制负荷的扰动,提出了一种基于最小熵H∞控制理论的鲁棒调速控制策略。该控制策略从熵的角度将H2最优控制和H∞最优控制结合起来,以闭环系统的熵函数为目标函数,据此设计的调速器具有良好的鲁棒性和快速的动态性能。仿真结果表明,在系统模型不确定的情况下,与H∞最优控制相比,最小熵H∞调速控制器可有效地改善系统的动态性能并抑制外部干扰对系统的影响,提高了船舶电力系统频率的稳定性。

A robust speed regulation control strategy based on minimum entropy H∞ control： theory is proposed to improve the dynamic precision of diesel engine speed regulation system and inhibit the perturbation of load. The strategy combines H2 and H∞ optimal control from the angle of entropy, with an objective function of the entropy on closed loop system. Thus the speed regulator is of good robustness and quick dynamic performance. Comparing with H~ optimal controll, the simulation results show that the minimum entropy H~ speed regulation controller can improve the dynamic performance of system and inhibit the effect of exogenous perturbation on system, which enhances the frequency stability of ship power system.