ABSTRACT
This chapter builds upon the introduction to QFT that is presented in Chap. 2. It is devoted to presenting an in-depth understanding and appreciation of the power of the QFT technique. This is accomplished by first presenting an introduction of the QFT technique using the frequency-response method as applied to a single-loop MISO system and an overview of the design procedure. Next a discussion of minimum-phase (m.p.) performance specifications is presented The remaining portion of the chapter is devoted to an in-depth development of the QFT technique as applied to the design of robust single-loop control systems having two inputs, a tracking and an external disturbance input, respectively, and a single output (a MISO system).1 The in-depth development of the QFT technique as applied to the design of robust MIMO control systems for tracking inputs is presented in Chaps. 5 through 7. Chapter 8 presents the analysis and design of a MIMO control system with external disturbances, i.e., the external disturbance rejection problem.
