Relay based PI-PD design for stable and unstable FOPDT processes
Relay based PI-PD design for stable and unstable FOPDT processes
复制标题
基于继电器的 PI-PD 设计，适用于稳定和不稳定的 FOPDT 过程
DOI：
10.1016/j.compchemeng.2005.12.013
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
S. Majhi
中科院分区：
文献类型：
--
作者：
P. K. Padhy;S. Majhi
针对稳定和不稳定的一阶加时滞（FOPDT）过程，提出了一种基于继电反馈检验的简单辨识方法。首先，一个继电器与比例控制器并联应用于内反馈时滞稳定过程的通常方式，以诱导极限环输出。从对极限环输出所做的测量，估计FOPDT过程模型的两个参数。假定FOPDT过程的稳态增益是先验已知的。然后，这些参数被用来设计一个两个自由度的比例-积分-比例-微分（PI-PD）控制器的基础上的环路相位裕度和增益裕度的标准。仿真例子说明了所提出的辨识和控制方法的有效性和简单性。
A simple identification method based on relay feedback test is proposed for stable and unstable first order plus time delay (FOPDT) processes. Initially, a relay in parallel with a proportional controller is applied to an inner feedback controller-stabilized process on the usual manner to induce limit cycle output. From the measurements made on the limit cycle output, two parameters of the FOPDT process model are estimated. The steady state gain of the FOPDT process is assumed to be known a priori. Then, these parameters are used to design a two degree of freedom proportional-integral–proportional-derivative (PI–PD) controller based on the loop phase margin and gain margin criteria. Simulation examples illustrate the effectiveness and the simplicity of the proposed identification and control method.