Principles of Automatic Control (6th Edition) edited by Hu Shousong, published by Science Press on February 201May, is a national and planning level textbook and three-dimensional textbook for undergraduate students of general higher education in the 12th Five-Year Plan. This textbook can be used as a textbook for automatic control, industrial automation, electrical automation, instrumentation and testing, machinery, electric power, metallurgy and other majors. In engineering colleges, it can also be used as a self-study reference for engineers and technicians engaged in automatic control.

The book consists of ten chapters, including the general concept of automatic control, mathematical model of control system, time domain analysis method of linear system, analysis of nonlinear control system and optimal control method of dynamic system.

The book is divided into ten chapters, which introduces the basic concept of automatic control, the mathematical model of control system in time domain, frequency domain and complex domain, its structure diagram and signal flow diagram; The time domain analysis, root locus method, frequency domain analysis, correction and design methods of linear control system are expounded. The basic theory, mathematical model, stability and steady-state error, dynamic performance analysis and digital correction of linear discrete systems are discussed.

In the analysis of nonlinear control system, two commonly used analysis methods, phase plane and description function, are given, and the inverse system method of nonlinear control is introduced. In the last two chapters, according to the needs of high-tech development, the state space analysis and synthesis of linear systems and the optimal control of dynamic systems are expounded.