Three-wire torsional pendulum method rigid body dynamic parameter test console

Abstract

The invention provides a three-wire torsional pendulum method rigid body dynamic parameter test console which comprises a test console chassis, a cycloid curve and a tray and is characterized in that a lifting device and a centering device are arranged on the test console chassis, wherein the lifting device comprises three jacks; the jacks are circumferentially and uniformly distributed through taking the center of the chassis as the center of a circle; the centering device is positioned at the center of the chassis and comprises a jack and a centering shaft; and the centering shaft is installed at the upper end of a jack piston in the centering device and ascends or descends along with the piston. The three-wire torsional pendulum method rigid body dynamic parameter test console has the beneficial effects that through the lifting device of the test console, the tray can be conveniently and repeatedly lifted for multiple times, measured objects are convenient to put, load and unload, the tray can be fixedly arranged and put in a non-test state, and the service lives of the cycloid curve and the sensor can be prolonged; and through the centering device, the tray can be enabled to carry out pure torsion vibration around a central lead vertical axis without generating mixed pendulum or conical pendulum movement, so that the measurement precision and the measurement efficiency are improved.

Description

technical field [0001] The invention relates to a physical parameter testing platform, in particular to a testing platform with a lifting device and a centering device, which adopts the three-wire torsional pendulum vibration theory for testing rigid body dynamic parameters. Background technique [0002] Rigid body dynamic parameters are the basic and necessary input parameters required for modern design and analysis methods such as theoretical design of rigid body or multi-body system dynamic performance, simulation analysis, and virtual test. In industrial manufacturing, the object to be tested that needs to be tested for rigid body dynamic parameters is usually composed of various parts and materials, and is a complex rigid body with large volume, high mass, and irregular shape. [0003] When using a three-dimensional digital model to numerically calculate the dynamic parameters of a rigid body, it is difficult to obtain accurate results of the dynamic parameters due to t...

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Problems solved by technology

[0004] When using the three-line torsional pendulum method to measure the moment of inertia of a rigid body, it is necessary to frequently place or unload the object to be measured on a tray suspended by three cycloids. Since the tray is not completely fixed, the tray is easy to shake when moving the object to be measured. It is convenient for operation, but also has potential safety hazards; in addition, before the three-wire pendulum is cleared and tested for the measurement of the moment of inertia of the rigid body, in order to prevent the measurement accuracy from falling due to the mixed pendulum or conical pendulum of the pallet, it is necessary to manually brake the pallet until the pallet Only when it is completely still can relevant operations be carried out, resulting in low test efficiency

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