Online measurement method for revolve-body high-precision moment of inertia

Abstract

The invention discloses an online measurement method for revolve-body high-precision moment of inertia. The method includes the steps of 1), motor current and the moment of inertia relation modeling, namely inferring relation of the motor current and the moment of inertia according to the fact that the motor drive torque is in direct proportion to the current and the motor drive torque is equal to multiplication of the moment of inertia and angular acceleration; 2), calibration of the moment of inertia current coefficient and motor shaft moment of inertia, namely calibrating the moment of inertia current coefficient through a plurality of standard blocks with the known moment of inertia and then determining the motor shaft moment of inertia; 3), measurement of the revolve-body moment of inertia, namely calculating the moment of inertia of a revolve body according to the well calibrated moment of inertia by measuring the motor current. With the method, online measurement can be realized, higher measurement precision is achieved, the measurement precision is within 3%, and most of measurement requirements can be met.

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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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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