Servo system, also known as servo system, is a feedback control system used to accurately follow or reproduce a process. Servo system is an automatic control system that enables the output controlled quantities such as the position, orientation and state of the object to follow the arbitrary change of the input target (or given value). Its main task is to amplify, transform and regulate the power according to the requirements of the control command, so as to make the torque, speed and position control of the driving device very flexible and convenient. In many cases, servo system specifically refers to the feedback control system of mechanical displacement or displacement speed and acceleration. Its function is to make the output mechanical displacement (or rotation angle) accurately track the input displacement (or rotation angle). Its structure is not different from other forms of feedback control system in principle. Servo system was initially used in national defense and military industry, such as artillery control, automatic piloting of ships and aircraft, missile launch, etc. later, it was gradually extended to many departments of the national economy, such as automatic machine tools, wireless tracking control, etc.

One weigh, two pinch, three smell, four rub1. The heavier the wipes of the same specification, the better the water absorption and the higher the pure cotton content2. Pinch --- the higher the pure cotton content of the wet towel, the harder it is to pinch3. Smell - the humidifying liquid with good quality smells fragrant and suitable without pungent feeling4. Rubbing - wet wipes with high cotton content are not easy to slide and feel comfortable

Pay attention to cleaning every day, clean up accumulated dirt, and have maintenance requirements every week and every month.

The outermost layer is polyethylene film. The inner layer contacting the baby's skin is usually polypropylene. These two substances are harmless to the body. Aloe and vitamin E are used in some brands of diapers. The commonly used Diaper Rash Cream contains these two substances.

1. Fault cause ① excessive bearing clearance due to wear; ② Uneven air gap; ③ Rotor unbalance; ④ Shaft bending; ⑤ The coaxiality of coupling (pulley) is too low. 2. Troubleshooting ① repair the bearing and replace it if necessary; ② Adjust the air gap to make it uniform; ③ Correct rotor dynamic balance; ④ Straighten the rotating shaft; ⑤ Recalibrate to make it meet the requirements