分别采用模糊控制方法与常规PID控制方法，对空调客车内温度控制系统进行了仿真研究。仿真结果表明，PID控制能消除稳态误差，但超调大，过渡时间长，在工况变化较小的情况下，能满足一定的控温要求；对于对象延迟、工况变化较大的场合，模糊控制能实时跟踪空调工况变化，较快地达到控温目标值，节能率高，综合控制效果比PID要好。

The issue studies, in virtue of simulation, temperature control system in air-conditioned coach by fuzzy and PID control methods. The simulation results show that PID control can eliminates steady-state error, but the overtune is big, transitional time is long. And PID control can only suit for air conditioning condition with small variation. For the condition with big variation and time delay, fuzzy control can track the load changes and obtain a better synthetic control quality than PID.