1.3 Classification and composition of servo system
Servo system according to the system structure can be divided into open loop servo system, closed loop servo system, semi-closed loop system, composite control system.
The closed-loop automatic control system with feedback is composed of position detection part, deviation amplification part, execution part and controlled object.
1.4 Performance requirements of the servo system
Servo system must have good controllability, high stability and strong adaptability and other basic performance. To explain, good controllability means that after the signal disappears, it can stop itself immediately; High stability means that the torque decreases uniformly with the increase of speed; Strong adaptability means fast response, sensitivity and good sound quality.