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

An inertial parameter and measurement device technology, which is used in measurement devices, machine/structural component testing, static/dynamic balance testing, etc., and can solve the problems of complex measurement operation process, affecting measurement accuracy, and inability to measure inertial products.

Inactive Publication Date: 2010-12-15
CHONGQING UNIV
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  • Abstract
  • Description
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  • Application Information

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

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Embodiment Construction

[0039] The content of the invention is further elaborated below by accompanying drawings and specific examples:

[0040] By establishing the multi-body dynamics virtual prototype model of the bench, the size of the tray 4 is 800mm*800mm*20mm, and its m 0 =110.034kg, the moment of inertia Ip0=6.5kgm about the horizontal axis passing through the center of mass 2 , spring stiffness k=5000N / m, four in total, the distance from the point of action to the rotating shaft R=0.350m, the free length of the spring is 200mm, the direction of the spring is perpendicular to R, the rotating shaft is horizontal, passing through the center of mass of the pallet 4, the distance from the upper plane of the pallet 4 h 0 =0.010m, the calibration block is a cube with a side length of 200mm and a mass of m 2 =60kg, the moment of inertia I passing through the intermediate axis of the center of mass 2 =0.42kgm 2 , measure a Figure 4 A rectangular rigid body with a medium size of 300mm*400mm*500mm...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/12G01M1/10
Inventor 褚志刚蒋忠翰吴优
Owner CHONGQING UNIV
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