说明：  在过程控制中，按偏差的比例（P）、积分（I）和微分（D）进行控制的PID控制器（亦称PID调节器）是应用最为广泛的一种自动控制器。它具有原理简单，易于实现，适用面广，控制参数相互独立，参数的选定比较简单等优点；而且在理论上可以证明，对于过程控制的典型对象
(In the process control, according to the proportion of deviation (P), integral (I) and differential (D) control of PID controller (also known as PID regulators) is the most widely used an automatic controller. It has a simple principle, easy to implement, wide application, control parameters are independent of the selected parameter is relatively simple, etc and in theory can be proved that the typical target for process control)