Motivation: Multiobjective thinking in controller tuning

Abstract

Throughout this chapter, we intend to provide a multiobjective awareness of the controller tuning problem. Beyond the fact that several objectives and requirements must be fulfilled by a given controller, we will show the advantages of considering this problem in its multiobjective nature. That is, optimizing simultaneously several objectives and following a multiobjective optimization design (MOOD) procedure. Since theMOOD procedure provides the opportunity to obtain a set of solutions to describe the objectives trade-off for a given multiobjective problem (MOP), it is worthwhile to use it for controller tuning applications. Due to the fact that several specifications such as time and frequency requirements need to be fulfilled by the control engineer, a procedure to appreciate the trade-off exchange for complex processes is useful.