High-speed rod hub transmission control method

Abstract

The present application belongs to the field of metallurgy, and relates to a high-speed rod hub transmission control method. According to a PLC control signal, a large proportion, small integral and high dynamic characteristic control is adopted in the starting process of a hub motor through a speed regulator, and a small proportion, large integral and steady-state control is adopted in the braking process. When the rolling speed is high, additional torque is added on the main torque channel for real-time dynamic adjustment, so as to shorten the starting time. The present application first proposes dynamic setting of hub control process parameters, and sets the response hub motor control parameters according to the PLC signal in different stages. The present application first proposes a hub control model, additional torque is added on the main torque channel to improve the starting torque of the hub, suppress the current and improve the response speed of the hub motor. According to the operation characteristics of the hub equipment, an advanced control concept is adopted to control the fast response of the hub, so as to ensure the stable operation of the hub at a rolling speed of more than 45 m / s of the high-speed rod production line.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical technology, specifically relating to a high-speed bar hub transmission control method. Background Technology

[0002] Existing rotary drum control technology suffers from slow response speed and frequent steel piling failures in high-speed bar production lines with rolling speeds exceeding 45 m / s and rolling intervals exceeding 3 seconds. It also fails to keep up with the production pace. After the PLC sends a signal, the rotary drum has difficulty reaching the expected state in a very short time, resulting in large overshoot of the motor control curve, unstable curve oscillation, and poor speed tracking. Summary of the Invention

[0003] The purpose of this invention is to provide a high-speed bar mill hub transmission control method to improve the hub response speed and ensure stable hub operation at rolling speeds of 45 m / s or higher in high-speed bar mill production lines.

[0004] The technical solution adopted by this invention to solve its technical problem is: a high-speed bar hub transmission control method, the steps of which are as follows:

[0005] 1) Based on the PLC control signal, the speed regulator adopts high dynamic characteristic control with large proportion and small integral during the starting process of the hub motor, and low proportion and large integral steady-state control during the braking process.

[0006] 2) At high rolling speeds, an additional torque is added to the main torque channel for real-time dynamic adjustment to shorten the start-up time.

[0007] Further, the additional torque control in step 2) is as follows: Initial parameter values: P = 15, I = 0, acceleration compensation filter time 10ms, additional torque 20%; Parameter switching values: P = 5, I = 0.35, acceleration compensation filter time 8ms, additional torque 10%.

[0008] The present invention has the following beneficial effects:

[0009] This invention is the first to propose dynamic tuning of the control parameters for the rotating drum, setting the control parameters of the rotating drum motor in response to PLC signals at different stages. It also proposes a new rotating drum control model, adding an additional torque to the main torque channel to improve the starting torque of the rotating drum, suppress current, and improve the response speed of the rotating drum motor. Based on the operating characteristics of the rotating drum equipment, an advanced control concept is adopted to control the rotating drum's rapid response, ensuring stable operation of the rotating drum at rolling speeds exceeding 45 m / s in high-speed bar production lines. Detailed Implementation

[0010] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention. However, the scope of protection of the present invention is not limited to these embodiments. All changes or equivalent substitutions that do not depart from the concept of the present invention are included within the scope of protection of the present invention.

[0011] A high-speed bar stock hub drive control method, comprising the following steps:

[0012] 1) Based on the PLC control signal, the speed regulator adopts high dynamic characteristic control with large proportion and small integral during the starting process of the hub motor, and low proportion and large integral steady-state control during the braking process.

[0013] 2) At high rolling speeds, because the starting torque of the drum is large, an additional torque is added to the main torque channel for real-time dynamic adjustment, shortening the start-up time and quickly reaching the set speed.

[0014] Before optimization: Parameters were fixed values: P=12, I=0, acceleration compensation filter time 8ms, and additional torque 0. The overshoot was large, the curve oscillated and unstable, and the speed tracking was poor.

[0015] After optimization, the initial parameter values ​​are: P = 15, I = 0, acceleration compensation filtering time 10ms, and additional torque 20%; the parameter switching values ​​are: P = 5, I = 0.35, acceleration compensation filtering time 8ms, and additional torque 10%. The overshoot is reduced, the curve exhibits better following behavior under high dynamic response, and stability is improved. Based on the operating characteristics of the rotating drum equipment, an advanced control concept is adopted to control the drum's rapid response, ensuring stable drum operation at rolling speeds exceeding 45 m / s on high-speed bar production lines.

[0016] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0017] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A high-speed bar stock hub drive control method, characterized in that, The steps are as follows: 1) Based on the PLC control signal, the speed regulator adopts high dynamic characteristic control with large proportion and small integral during the starting process of the hub motor, and low proportion and large integral steady-state control during the braking process. 2) At high rolling speeds, an additional torque is added to the main torque channel for real-time dynamic adjustment to shorten the start-up time; The additional torque control in step 2) is as follows: Initial parameter values: P=15, I=0, acceleration compensation filter time 10ms, additional torque 20%; Parameter switching values: P=5, I=0.35, acceleration compensation filter time 8ms, additional torque 10%.