Measuring device and method of all-inertial parameter of rigid body

Abstract

The invention relates to measuring device and method of an all-inertial parameter of a rigid body. The device comprises a deep groove ball bearing 1, a shaft pin 2, a connecting plate 3, a tray 4, a return spring 5, a spring seat 6 and a supporting frame 7, wherein a rotating shaft assembly is connected with the bearing 1 through the shaft pin 2; the return spring 5 is arranged on the spring seat 6 and used for supporting the tray 4; the tray 4 can swing back and forth around the rotating shaft to form an inverted pendulum; and the surface of the tray 4 is provided with corner scales which can ensure that measurers can visually find out the space position of an object to be measured. The method for measuring the all-inertial parameter of the rigid body by the device comprises the following steps of: (1) measuring a vibration period T of a tray system by using the measuring device; (2) calculating a mass center position and a rotary inertia; and (3) calculating an inertia product. It is found that the measuring precision is higher under the condition that the mass center position of the measured object is closer to the relative position of the rotating shaft. By applying the method, the mass center position, the rotary inertia and the inertia product of the measured object can be directly measured, and the method has simple principle, easy realization, convenient operation and easy precision control.

Description

Technical field: [0001] The invention belongs to a measuring device and method for a rigid body, in particular to a measuring device and method for measuring the total inertial parameters of a rigid body. Background technique: [0002] In the prior art, there are usually two types of devices and methods for measuring the inertial parameters of a rigid body: one is to apply a certain torque to the rigid body, then measure its acceleration through a measuring device, and calculate the moment of inertia through the moment of momentum theorem; the other is to use a pendulum Method, by measuring its torsional vibration period with a measuring device to calculate the moment of inertia. These methods all need to measure the position of the center of mass of the rigid body in advance, the preparatory work and operation process are complicated, and the error is relatively large, and only the moment of inertia of the rigid body around a specific axis can be measured, and the product o...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that the position of the center of mass needs to be measured in advance, the measurement operation process is complicated, the inertia product cannot be measured, and the measurement accuracy is affected by multiple placement and removal of the calibration block, and a method for measuring the total inertia of a rigid body is proposed Parameter measuring device and method

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