A method for on-line measurement of high-precision moment of inertia of rotating body

A technology of moment of inertia and measurement method, which is applied in the field of physical quantity measurement, can solve the problems of low measurement accuracy and achieve the effects of high measurement accuracy, short measurement time and simple measurement system

Inactive Publication Date: 2017-06-06
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision online measurement method for the moment of inertia of a revolving body, which solves the problem of low measurement accuracy of the traditional online measurement method for the moment of inertia (free fall method and free deceleration method)

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  • A method for on-line measurement of high-precision moment of inertia of rotating body
  • A method for on-line measurement of high-precision moment of inertia of rotating body
  • A method for on-line measurement of high-precision moment of inertia of rotating body

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] Such as figure 1As shown, the method for on-line measurement of the high-precision moment of inertia of the rotating body in the present invention includes three parts: modeling of the relationship between the motor current and the moment of inertia, the calibration of the current coefficient of the moment of inertia and the moment of inertia of the motor shaft, and the measurement of the moment of inertia of the rotating body. In order to realize the online high-precision measurement of the moment of inertia of the rotating body, firstly, according to the fact that the motor drive torque is proportional to the current and the motor drive torque is equal to the product of the moment of inertia and the angular acceleration, the relationship model between the motor current and the moment of inertia is derived, specifically as follows figure 2 show...

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Abstract

The invention discloses a high-precision online measurement method for the moment of inertia of a revolving body, which includes three steps: (1) Modeling the relationship between the motor current and the moment of inertia: according to the fact that the driving torque of the motor is proportional to the current and the driving torque of the motor is equal to the moment of inertia and (2) Calibration of the current coefficient of the moment of inertia and the moment of inertia of the motor shaft: through several standard blocks with known moments of inertia, the current coefficient of the moment of inertia is calibrated, and then Determine the moment of inertia of the motor shaft; (3) Measurement of the moment of inertia of the rotating body: by measuring the motor current, calculate the moment of inertia of the rotating body according to the calibrated moment of inertia current coefficient. The method for measuring the moment of inertia of the invention can not only realize on-line measurement, but also has high measurement accuracy, the measurement accuracy is within 3%, and can meet most measurement requirements.

Description

technical field [0001] The invention belongs to the field of physical quantity measurement, and relates to a method for measuring the moment of inertia of a revolving body. Background technique [0002] The moment of inertia is used to measure the inertia of the rotating body during the rotation process, and it is an important aspect of the quality characteristics of the rotating body. The parameters of moment of inertia of rotating body have many applications in engineering, so it is of great significance to measure the moment of inertia of rotating body accurately and quickly. Scholars at home and abroad have done a lot of research on the measurement of the moment of inertia of the rotary body, from small rotary bodies to large rotary bodies, from simple rotary bodies to complex rotary bodies. The measurement methods of the moment of inertia of the rotating body mainly focus on the free fall method, the free deceleration method, the three-wire pendulum method, and the tor...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/10
Inventor 陈虹任要义勇赵丽萍王亚飞
Owner XI AN JIAOTONG UNIV
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