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本文在对一阶对象调节的稳定性理论分析的基础上,指出了容易被人们忽视的事实,即一阶对象PI调节,当调节器的放大倍数K_c超过某一唯一存在的数值后,系统的稳定程度归随着的增大而增强,并给出了模拟实验的验证结果。不少文献和人们的一般印象认为用PI算法控制一阶对象时,随着K_c的增大(或减小比例度)将系统的稳定性变差,反之则稳定性增强。事实不然。这个问题从理论上加以阐明是不困难的,但却往往被疏忽了。下面略加讨论。
Based on the theoretical analysis of the stability of the first-order object adjustment, this paper points out the easily overlooked fact that the first-order object PI adjustment, when the regulator’s magnification K_c exceeds a unique value, the system The degree of stability increases with the increase, and the simulation results are given. Many literature and people’s general impression that when using the PI algorithm to control a first-order object, the stability of the system will be worsened as K_c increases (or decreased), otherwise the stability will be enhanced. Not true. It is not difficult to state this question theoretically, but it is often neglected. A little discussion below.