ServoSystem (ServoSystem), referred to as the servo system, is a mechanical position or Angle as the control object of the automatic control system, such as CNC machine tools. The drive motor used in the servo system requires a fast response speed, accurate positioning, and moment of inertia (The moment of inertia of the servo motor used in the electromechanical system is large, in order to be able to directly connect with the lead screw and other mechanical components. The servo motor has a special small inertia motor in order to get a very high response speed. However, the overload capacity of this type of motor is low, and the deceleration device must be increased when used in the feed servo system. Moment of inertia reflects the acceleration characteristics of the system, when choosing a servo motor, the moment of inertia of the system can not be greater than 3 times the moment of inertia of the motor. Larger and other characteristics, this kind of special motor is called servo motor. Of course, its basic working principle is no different from that of ordinary AC-DC motors. The special drive unit of this type of motor is called the servo drive unit, sometimes referred to as the servo, which generally includes the current, speed and/or position closed loop.
Servo is a performance term, generally as long as the master command and control results have reached a certain high degree of approximation can be called servo, which has no direct relationship with the structure of the machine. For example, the servo system has no precise inertia matching range, which is because the result of inertia matching as long as it does not affect the control object to follow or have little influence on the master command, it has nothing to do with the specific 3 or 3.5. The servo system is not necessarily a motor system, and some pneumatic systems are called pneumatic servo.
Servo system is essentially a servo system. It's just that the quantity under control is a displacement or its derivative with respect to time. If you ask what is a servo system, it is the output of a system to reproduce the input signal in the fastest and most accurate way possible. The indexes to be measured include overshoot and delay.
The servo system is an automatic control system that makes the output controlled quantity such as the position, orientation and state of the object follow any change of the input target (or given value). The main task of servo is to amplify, transform and regulate the power according to the requirements of the control command, so that the torque, speed and position control of the output of the drive device are very flexible and convenient.
