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Method for measuring rotational inertia of transmission system

A technology of moment of inertia and transmission machinery, which is applied in the field of measuring the moment of inertia of the transmission system, and can solve problems such as failure to meet tension accuracy requirements, fluctuations, etc.

Inactive Publication Date: 2012-06-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, when there is a 5% error in the moment of inertia, the set tension will fluctuate by 13.47% during the acceleration and deceleration process, which is far below the tension accuracy requirements of static 1% and dynamic 2%.

Method used

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  • Method for measuring rotational inertia of transmission system
  • Method for measuring rotational inertia of transmission system
  • Method for measuring rotational inertia of transmission system

Examples

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] In this example, the electrical control system of an aluminum foil rolling mill, the coiler is a DC motor, using ABB's DCS800 DC transmission device, using Siemens S7-400PLC system as a test and data recording tool, the maximum speed of the coiling motor is 1197rpm, and the rated output The torque is 3600Nm.

[0029] A method for measuring the moment of inertia of the transmission system in this embodiment, such as image 3 shown, including the following steps:

[0030] Step 1: The PLC system is connected to the DC transmission device through the PROFIBUS-DP network, set 51 groups of corresponding parameters in the DC transmission device DCS800, read the actual speed and output torque of the motor to the PLC system, and record the actual data of each cycle to the Save in the data module of PLC;

[0031] Step 2: Run the motor at a spe...

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Abstract

The invention relates to a method for measuring the rotational inertia of a transmission system and belongs to the technical field of automatic control in the rolling process. A transmission device controls a motor to start; the motor drives a reeling machine to work; the motor is operated at a low speed, so that transmission mechanical equipment is in a hot operation state; the transmission mechanical equipment comprises the motor, a speed reducer and the reeling machine; friction torque of the transmission mechanical equipment is calculated; a rotating speed-friction torque curve is drawn; an output torque limit amplitude M0 is set and the rotational inertia of the transmission mechanical equipment is measured; calculation is performed respectively to obtain multiple groups of rotational inertia; and singular points are removed and the average value of the residual groups serves as the rotational inertias of the transmission mechanical equipment. The method can be implemented conveniently under many transmission measurement environments; cost investment is not required; after the rotational inertias of the transmission mechanical equipment are obtained accurately, tension control precision and stability of the rolling process can be improved greatly; and the method can be widely applied to plate strip foil rolling mills.

Description

technical field [0001] The invention belongs to the technical field of rolling process automatic control, in particular to a method for measuring the moment of inertia of a transmission system. Background technique [0002] Rolling with tension is generally required in strip rolling production. Tension is not only a necessary condition to ensure the smooth progress of the rolling process, but also an important factor affecting the quality of finished products. Tension control plays an important role in the following aspects during the rolling process of the strip: preventing the deviation of the rolled piece, maintaining the flatness of the rolled piece, reducing the rolling pressure to reduce energy consumption, and adjusting the thickness of the strip. [0003] In the tension control mode, the strip tension is generally adjusted by controlling the output torque of the transmission system. A very important link in the tension control is the dynamic torque compensation durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B38/00
Inventor 李旭孙杰赵况张欣张浩宇谷德昊张殿华
Owner NORTHEASTERN UNIV
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