Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system

A technology of control system and transmission system, applied in rolling mill control device, roll speed control, metal rolling, etc., can solve the problems of large dynamic speed drop, inability to suppress speed oscillation, etc., to reduce dynamic speed drop, simple structure, restraint The effect of torsional vibration

Inactive Publication Date: 2006-07-19
AUTOMATION RES & DESIGN INST OF METALLURGICAL IND +1
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Problems solved by technology

[0004] The control system will produce a large dynamic speed drop when the load is suddenly added to the rolling mill. At the same time, since the

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  • Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system
  • Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system
  • Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 2 As shown, the rolling mill speed control system used in this patent includes a rolling mill drive two-mass elastic system, a control system and a power conversion system. The hardware of the control system is a dedicated processor board, and the software function structure is shown in the dotted frame of the control part in the figure. Motor speed given value (ω * ) and the speed detection value (ω) are input to the speed regulator, and its output is the torque current given value i 1 * ;Motor current detection value i M and the motor speed detection value are input to the load observer, and the observer calculates the load torque observation value and the observed value of torsional velocity difference The observed value is calculated by the state feedback gain amplifier to form the compensation current given value i 2 * (used to com...

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Abstract

The invention discloses a control system of dynamic deceleration and torsional to inhibit the driving system of rolling mill in the rolling mill driving control domain, which comprises the following parts: two-quality elastic driving system of rolling mill, control system and power variable-flow system, wherein two-quality elastic driving system of rolling mill contains rolling mill and roller to connect by connection axle; the control system contains load observer, state feedback gain amplifier and motor speed-adjusting system; the power variable-flow system is electric power electronic transformer, which transforms the electrical network voltage and current into fitful motor voltage and current to drive the motor speed-adjusting operation according to the control pressure.

Description

technical field [0001] The invention belongs to the field of rolling mill transmission control, and in particular provides a control system for suppressing dynamic speed drop and torsional vibration of a rolling mill transmission system. Background technique [0002] The rolling mill transmission system is a complex multi-mass elastic system, and its mechanical model can be roughly equivalent as Figure 4 In the two-mass elastic system shown, two inertial links (motor and roll) are connected by an elastic link (connecting shaft). The transfer function structure block diagram of the system Figure 5 shown. Under the sudden load of the rolling mill transmission system (such as biting steel, throwing steel, braking, shifting, etc.), the system will experience unstable torsional vibration (referred to as torsional vibration), and the maximum torque on the connecting shaft caused by torsional vibration The value is much larger than the static torque during normal rolling, and i...

Claims

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Application Information

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IPC IPC(8): B21B37/00B21B37/46
Inventor 李崇坚段巍李向欣朱春毅葛刚何山唐黎
Owner AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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