This book systematically and comprehensively introduces the basic concepts, basic principles and typical methods in the course of automatic control principle. It mainly includes: mathematical model of control system, time domain analysis, root locus analysis and design method, frequency domain analysis and system synthesis of control system.
Because Pei Run's writing is relatively simple, there is no explanation, and there are still some mistakes that need to be corrected by himself, so if you encounter something you don't understand, you can search for some online courses on the principle of automatic control. Here I recommend the principle of self-control taught by Shi Qun, a teacher from Northeastern University. Shi Qun's detailed lectures are very helpful for you to understand this course.