介绍了基于simulink的柴油机简化模型以及双闭环控制器的搭建并进行仿真，应用z-n优化方法进行优化，得到了优化后的pid参数(The simplified model of diesel engine based on Simulink and the construction and Simulation of double closed loop controller are introduced. The Z-N optimization method is used to optimize the PID parameters.)