Feedforward controller design for couple tank system via higher order sinusoidal input describing functions

This study deals with the design of feedforward controller for the couple tank system via Higher Order Sinusoidal Input Describing Functions (HOSIDFs). In this study, HOSIDFs are used to analyze the effects of nonlinear terms such as actuator saturation to the output of the system. In this study consists of implementation and design of feedforward controller whose coefficients are calculated via HOSIDF based cost function given in this study. The study also present frequency and time domain plots of the system output in order to illustrate the effect of the proposed feedforward controller which improves the reference tracking performance of the overall system.