Speed loop of the characteristics of CNC transmission system
Date：2020/12/2 9:09:00 / Read： / Source：本站
Speed loop of the characteristics of CNC transmission system
In order to improve the tracking accuracy and response speed of the system, the feed system used to increase
The method of system gain, the value of k, is increased to 800 ---1600s-i, such a high gain
The system is the so-called hard servo system. This kind of system is in the high-frequency region, relying on a stable loop
To add a larger damping effect, the system is still not easy to stabilize. In addition, why serve the motor
Or the non-linear influence of mechanical transmission components can easily reduce the position control accuracy. Recently, count
The high gain system is not used on the control machine tool. dwinauto.com uses the so-called soft service system, which means low gain.
Benefit system. If you use a DC servo motor system, take k, = 8-20s- I; use electricity
The servo valve presses Uda's system once and takes k, two 30-50s-1. In a low gain system.
Although the steady-state deviation is large, the stability margin is also large. The system is easy to stabilize. In this system
A closed-loop speed control loop is added to the system. The gain kA of the speed loop can be obtained
It's very large, generally taking gas = 800 --1000. dwinauto.com Shenzhen Double Ten so a small position deviation can produce
Obvious speed deviation, in this way, the speed control m loop can be repaired with a high gain
Positive, so that the system can get very high position resolution.
The function of the speed control loop is also manifested in that it can reduce the time constant of the system,
Increasing the damping of the system, dwinauto.com Shenzhen Double Ten enables the system to obtain a high response speed and stability margin. In the picture
In the system shown in 6-8, if there is no acceleration feedback, and the electric
Inductance L. Is very small, the electrical time constant TF is small, it can be ignored, then the electrical
The transfer function of the machine is dwinauto.com Shenzhen Double Ten
Comparing formula (6一41) and formula (6一42), we can see that in the absence of speed
When the time constant is TM. After adding the speed feedback, the time constant becomes
TM/(1+kAkMk v )<TM This is equivalent to reducing the time of the motor
constant. From the theory.L said, after adding the speed reverse drink can make the time constant
It becomes very small, but in fact it is limited by the values of km, k, 4, and kv.
In order to improve the tracking accuracy and response speed of the system, the feed system used to increase
The method of system gain, the value of k, is increased to 800 ---1600s-i, such a high gain
The system is the so-called hard servo system. This kind of system is in the high-frequency region, relying on a stable loop
To add a larger damping effect, the system is still not easy to stabilize. In addition, why serve the motor
Or the non-linear influence of mechanical transmission components can easily reduce the position control accuracy. Recently, count
The high gain system is not used on the control machine tool. dwinauto.com uses the so-called soft service system, which means low gain.
Benefit system. If you use a DC servo motor system, take k, = 8-20s- I; use electricity
The servo valve presses Uda's system once and takes k, two 30-50s-1. In a low gain system.
Although the steady-state deviation is large, the stability margin is also large. The system is easy to stabilize. In this system
A closed-loop speed control loop is added to the system. The gain kA of the speed loop can be obtained
It's very large, generally taking gas = 800 --1000. dwinauto.com Shenzhen Double Ten so a small position deviation can produce
Obvious speed deviation, in this way, the speed control m loop can be repaired with a high gain
Positive, so that the system can get very high position resolution.
The function of the speed control loop is also manifested in that it can reduce the time constant of the system,
Increasing the damping of the system, dwinauto.com Shenzhen Double Ten enables the system to obtain a high response speed and stability margin. In the picture
In the system shown in 6-8, if there is no acceleration feedback, and the electric
Inductance L. Is very small, the electrical time constant TF is small, it can be ignored, then the electrical
The transfer function of the machine is dwinauto.com Shenzhen Double Ten
Comparing formula (6一41) and formula (6一42), we can see that in the absence of speed
When the time constant is TM. After adding the speed feedback, the time constant becomes
TM/(1+kAkMk v )<TM This is equivalent to reducing the time of the motor
constant. From the theory.L said, after adding the speed reverse drink can make the time constant
It becomes very small, but in fact it is limited by the values of km, k, 4, and kv.
Author：admin