控制系统设计指导

The basics of control systems were developed in the first half of the 20th century. Our predecessors aimed a cannon or warmed a bath using many of the same concepts we use. Of course, time and technology have generated many refinements. Digital processors have changed the way we implement a control law, but in many cases they haven’t changed the law itself. Proportional-integral-differential (PID) control works about the same today as it did four or five decades ago. Control systems are broadly used and are thus well integrated into our educational system.Courses are offered at most engineering universities, and a few disciplines even require students to undergo modest training in the subject. Given the longevity of the principles and the number of trained engineers engaged in their use, one might expect most of the trade’s practitioners to be comfortable with the basics. Unfortunately, that does not seem to be the case.