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เนื้อหาย่อ : Preface etive in writing this book has been to produce a good textbook ent's point of view. The authors have been teaching courses feedbaek controls, at both the undergraduate level and the I, for a number of years. As a r result of this experien for a textbook on feedback controls that would unify the diverse analysis and would present the fundamentals explicitly and s enlarged second edition gives the material in a sequer rs' experience, nce, enables the read ence that, ader to understand and apply the es. 'Terminology and definitions a ns are introduced and explained mphasis is placed on the topics c considered most important; and is arranged for ease in underst ce and engincering procced into the arena of knowns and un- past must continuously be re reevaluated. This was borne in mind ration of the second edition.S compaeted and ifed;some me were relocated: were introduced in order to ore cohesive and up-to-da An engineer having a thorough ing of the material in this text and having av vailable both analog computers has both an up-to- to-date knowledge and powerful analytie he analysis and synthesis of nst four chapters present nt the hasie mathematics of the analysis of tems. Aceount is given, al , of the physical laws of nature used rmance of various sys- the dynamie equations d wed by an outline of the classical and Laplace-transform methods these differentinl equa Chapter 4 emphasizes utilization of fe for graphically determining the coeffie cients in partial-fraction (residues) and for determining the frequen ney response from a pole- am. Next there is introduced the block-diagram method for sim- he representation of complex control systen ems; each basie funetion ntrol system is represe sented by a block, and the transfer funetion is a to represent the block mathematically. e is given as an al alternative means for conv nveying the same inforr The signal flow-graph Basie servomeehanism characteristics are deseribed, mation by details of the root-locus method of analysis. Important special- ience, they lock diagram.