Department of Chemical Engineering, National Institute of Technology, Warangal - 506 004, Telangana State, India.
Department of Chemical Engineering, National Institute of Technology, Warangal - 506 004, Telangana State, India.
ISA Trans. 2019 Nov;94:246-254. doi: 10.1016/j.isatra.2019.04.006. Epub 2019 Apr 16.
Many methods are proposed in the literature for control of nonlinear systems based on multi model approaches. Most of these methods are by simulation. An experimental investigation provides more understanding and also practical difficulties of nonlinear process control. This paper presents an experimental evaluation and comparison of gap metric based weighting methods for design of multi-model control schemes for control of levels in a spherical tank process and a conical tank process. IMC-PI controllers are designed for the corresponding linear models. A simulation study is first carried out to examine the performance of the level control on these nonlinear systems, in which the weights for local controllers combination are calculated by the weighting functions. The two weighting functions (1- δ and 1/δ) based on the gap metric value of particular linear model are calculated and used for constructing the global multi model controller. Level control in spherical and conical tank systems is studied to show the effective experimental implementation of the considered multi model control schemes.
文献中提出了许多基于多模型方法的非线性系统控制方法。这些方法大多数是基于仿真的。实验研究提供了对非线性过程控制的更多理解和实际困难。本文针对基于间隙度量的加权方法进行了实验评估和比较，用于设计多模型控制方案，以控制球形罐和圆锥形罐过程中的液位。针对相应的线性模型设计了 IMC-PI 控制器。首先进行了仿真研究，以检查这些非线性系统上的液位控制性能，其中局部控制器组合的权重通过加权函数计算。基于特定线性模型的间隙度量值计算了两种加权函数（1-δ 和 1/δ），并用于构建全局多模型控制器。研究了球形和圆锥形罐系统中的液位控制，以展示所考虑的多模型控制方案的有效实验实现。
