Multivariable Adaptive Control Of Two Funnel Liquid Tanks In Series

In this paper, we demonstrate continuous-time adaptive control for nonlinear system of two funnel tanks in series. For this purpose continuous-time input-output linear model is considered describing nonlinear system in the neighborhood of an operating point. The two approaches discussed here are direct estimation and alternate delta model. In the case of direct approach the key lies in the differential filters used to compute estimates. In the second strategy parameters of corresponding delta model are recursively estimated. A feedback control configuration with to degrees of freedom is adopted. In order to guarantee stability as well as asymptotic tracking of the step reference and step load disturbance attenuation, polynomial method is taken into account for the resulting controllers. A simulation software tool implementing illustrative model of two funnel liquid tanks in series has been studied in detail.