比值调节系统是在生产过程控制中常见的一种自动调节系统。它是籍保持二个变量(或几个变量)之间按一定的比例关系,以达到控制第三变量的目的。例如,它常被用于控制混合物产品的组分或控制化学反应器的进料。将四乙基铅加入到汽车用汽油中,需要保持一个适当的铅对汽油的比值,以使 Ratio control system is a common automatic control system in the production process control. It is to maintain the two variables (or a few variables) according to a certain percentage of relations, in order to achieve the purpose of controlling the third variable. For example, it is often used to control the composition of a mixture product or to control the feed to a chemical reactor. Addition of tetraethyl lead to automotive gasoline requires maintaining an appropriate ratio of lead to gasoline so that