自动控制理论是人类在了解自然和改造自然的过程中逐渐形成的一门学科。简单反馈控制的最早应用，可以追溯到古代亚历山大时期的克泰希比斯水钟，它就是利用反馈原理来调节流量的。19世纪中叶，J.C.麦克斯威尔对具有调速器的蒸汽机（这也利用了反馈原理来调速）系统进行了稳定性的研究。20世纪20年代，布莱克、奈奎斯特和波德在贝尔实验室的一系列研究工作奠定了经典自动控制（反馈）的理论基础------

-automatic control theory is the understanding of human nature and the natural process of evolving a disciplines. A simple feedback control of the earliest applications, can be traced back to ancient Alexandria period Ketaixibishi water bell, it is the principle of using feedback to regulate the flow. The mid-19th century, with the right Nan Maxwell governor of the steam engine (which also use a feedback principle to speed) system for the stability of the study. The 1920s, Black, Nyquist and Bode in the Bell Labs research work is a series of classical control (feedback), the theoretical foundation ------