Digital Design and Realize of Analog Correcting Device of the Small Power Servo System

In order to meet the practical needs of course teaching, such as computer control technology, electric drive control system, and train engineering students' practical abilities, this article presents an embedded controller which can replace the traditional desktop computer, input/output interface card and control software on the SKJ-Ⅱ digital servo system. It established a digital model of the SKJ-Ⅱ digital servo system including models of electric control box, DC torque motor, tachogenerator and optical-electricity encoder. A simplified dynamic structure diagram of digital position servo system was also introduced. Through the reasonable selection between ACR and ASR regulator, we can get the conclusion that the double closed loop DC speed regulating system can be regarded as a first-order rate inertial system. In order to facilitate teaching, the PC screen display method based on the serial communication was designed. It can realize the waveform display and morphology display of given wheel display and feedback wheel. The teaching practice results show that this design not only improved the learning initiative of students but also improved the abilities of combining theory with practice.