中文摘要：

为满足船用柴油机燃油共轨动态轨压控制的要求,以瓦锡兰RT-flex60C为研究对象,建立船用共轨燃油系统数学模型,经分析得出影响燃油共轨轨压的主要因素是柴油机转速和喷油量。在MATLAB/Simulink仿真过程中,以这两个要素为输入量,通过查MAP图得到理论前馈油门齿条量;再以轨压为输入,通过模糊PID控制得到反馈油门齿条量,从而形成燃油系统轨压控制策略。仿真实验结果表明：改进的控制方法降低了轨压波动,动态轨压控制时超调量大为减少,响应速度加快。

英文摘要：

The Wartsila RT- flex 60C diesel engine is selected as the object to research pressure control of fuel common rail system. The system simulation model is established to analyze the main factors affecting rail pressure in the system. It is concluded that the main factors are diesel engine speed and fuel injection quantity. In the process of MATLAB/Simulink simulation, the rail pressure control logic is designed by adopting maps with the two factors as independent variables to get theory feed-forward quantity of fuel rack, and the feed-forward quantity of fuel rack is obtained by fuzzy PID control. The simulation experiments show that the improved control method reduces the rail pressure fluctuation, the overshoot volume of dynamic rail pressure control is greatly reduced with quick response velocity.