Unity Feedback Systems

This chapter covers a number of the main techniques and results in MIMO linear time-invariant feedback systems. There are three main reasons for this choice of subject: first, MIMO feedback systems are ubiquitous in modern industry (autopilots, control of auto and airplane engines, automated manufacturing systems, process control,…); second, the statement of and derivation of these main results constitute an excellent demonstration of the power of the concepts and the techniques developed in the previous chapters; third, a number of these results are basic to computer-aided design procedures. In fact a good number of these concepts and techniques were invented to understand and solve feedback problems.