Iterative Decoupler Design Method for TITO Processes

In this paper, possibilities for iterative tuning of the decoupler for TITO (two inputs and two outputs) process are investigated. The developed algorithm is based on getting decouplers terms iteratively, taking into account previously defined limits of response quality indicators. The effectiveness of the designed new method has been presented in four examples using simulations. It enables similar performances as computational methods for decoupler design from the literature, but without knowing of process mathematical model. So, that is a less complicated and less time-consuming method, which can be used for adding a decoupler to an already controlled process during its functioning and also for improving terms of an existing decoupler.