图10—1(a)是精馏塔塔釜液面调节系统简图,其调节对象是一个液面对象。在化工过程的控制中还有其他调节对象,例如温度对象、压力对象、流量对象等,但对于任何调节对象一般有如下特点: (1)调节对象中有一个(或数个)工艺要求调节的参数称为被调参数(图例中为液面参数),而且此参数一般是可连续测量的。 Figure 10-1 (a) is a schematic diagram of the distillation tower bottoms level adjustment system, the object of regulation is a liquid level object. There are other adjustment objects in the control of the chemical process, such as temperature object, pressure object, flow object, etc. However, any adjustment object generally has the following features: (1) There is one (or several) process requirements in the adjustment object The parameter is called a parameter to be tuned (in the example, the liquid level parameter), and this parameter is generally continuously measurable.