船用核汽轮机转速串级前馈-反馈模糊PID控制

Research on Speed Controller in Marine Nuclear Steam Turbine Based on Cascade Feed for ward-feedback Fuzzy PID Algorithm

以船用核汽轮机为研究对象,建立了船用核汽轮机各模块的数学模型,在此基础上设计了核汽轮机转速的串级前馈-反馈PID控制系统,基于模糊控制原理,采用串级前馈-反馈模糊PID控制对串级前馈-反馈PID算法进行改进。对三种控制系统进行了仿真实验,较好地模拟了船用核汽轮机升速过程;进而对控制系统分别添加四种扰动以证明控制算法的有效性,仿真结果表明模糊算法在改进前馈-反馈PID控制效果方面起了显著地作用,体现了智能算法与传统算法相结合的控制思想在船用核汽轮机转速控制方面的应用前景。

The mathematic model of the marine nuclear steam turbine speed control system is established, according to which the design of cascade feedforward-feedback PID control algorithm of the nuclear steam turbine speed is carried out. Then, cascade feedforward-feedback fuzzy PID control algorithm is used to improve the control effect of the system. Simulation experiments are carried out to imitate the speed-up process of marine nuclear steam turbine well. The results of simulation with different disturbances show that fuzzy algorithm has an important effect on improving the control effect of cascade feedforward-feedback. It comes to a conclusion that the combination of intelligent algorithm and traditional algorithm has a promising prospect in the design of the marine nuclear steam turbine speed control system.