Improved control of integrating cascade processes with time delays using fractional-order internal model controller with the Smith predictor

This article proposes an enhanced control of integrating cascade processes. The importance the scheme shows by controlling a double process with time delay under significant parametric uncertainties and load disturbances. A novel design is proposed based on Smith predictor principle uses fractional-order internal model controller in outer loop. required tuning parameter follows desired gain phase margins. At same time, another parameter, such as fractional filter’s constant, calculated from performance constraint. Numerical analysis comparison are performed to showcase feature hybrid structure. simulation results show that controller–based provides tracking faster regulation capabilities works well nominal uncertainty conditions.