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arXiv 0705.3397math.OC
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一阶时滞系统的超越PI控制器

Beyond the PI Controllers in First-Order Time-Delay Systems

Gianpasquale Martelli

摘要:

本文研究和比较了一阶时滞对象的三种控制系统:反馈比例积分控制器(PI)、Smith预估器(SP)和由两块组成的变结构控制器。该结构在设定点改变后充当开环比例控制器,并且在误差进入预设带时充当闭环积分控制器。一个图表,提供了稳定区的边界线和两个设计参数的曲线,实现了每个控制器。第一个参数是受控变量的过冲,在设定点的阶跃变化期间进行评估,并使其等于预设值。第二个参数,仅适用于PI和SP控制器,是平方误差的积分(ISE),它必须具有最小允许值。ISE也被假定为比较指标,所提出的控制器似乎是最好的。

英文摘要:

In this paper the following three control systems for first-order time-delay plants are studied and compared: the feedback proportional-integral controller (PI), the Smith Predictor (SP) and a proposed variable structure consisting of two blocks. This structure acts as an open-loop proportional controller, after a setpoint change, and as a closed-loop integrating controller, when the error enters in a preset band. A chart, provided with the borderlines of the stability zone and with the curves of two design parameters, is implemented for each controller. The first parameter is the overshoot of the controlled variable, evaluated during a step change of the setpoint and made equal to a preset value. The second parameter, only for the PI and SP controllers, is the integral of the squared error (ISE), which must have the minimum allowable value. The ISE is also assumed as comparison index and the proposed controller appears as the best.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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