从广义角度来说，所有的工业过程控制对象都是具有纯滞后(时滞)的对象。衡量过程具有纯滞后的大小通常采用过程纯滞后和过程惯性时间常数之比 。-Broadly speaking, all industrial process control objects are having a time delay (Delay) objects. Measure the size of the process is usually higher than with a pure lag time delay process and the process of inertia time constant use.