ABSTRACT
A large class of real-life processes present themselves as multiple-input, multiple-output (MIMO) systems. These processes not only include chemical plants but also other ones such as manufacturing processes, atmospheric process, etc. For the rest of the discussion in this chapter, we shall consider a MIMO system with nu inputs and ny outputs under open-loop conditions and term it as a nu × ny system. What is the main challenge in identification of MIMO systems? It is the correlation among inputs that precludes us from a direct application of the delay estimation techniques described in Chapter 22 or the SISO input-output identification methods in Chapters 20 and 21.
