Self-adaptive high-precision rotational inertia measuring device

Abstract

The invention provides a self-adaptive high-precision rotational inertia measuring device, which relates to the field of mechanical design and testing, and comprises a mounting platform, a base, a small-range torsional spring mechanism, a medium-range torsional spring mechanism, a large-range torsional spring mechanism, a bearing, an angular acceleration sensor, a supporting spring and a rotating shaft, the lower portion of the installation platform is connected to the base, the installation platform and the base are respectively provided with a bearing, the bearings are connected through a rotating shaft, the rotating shaft is sleeved with the supporting spring, and the small-range torsional spring mechanism, the middle-range torsional spring mechanism and the large-range torsional spring mechanism are connected to the base. And the small-range torsional spring mechanism, the medium-range torsional spring mechanism and the large-range torsional spring mechanism are correspondingly connected with convex transmission blocks on the mounting platform. Stretching and retracting of the installation platform are achieved through the supporting spring, the outwards-protruding transmission block makes contact with the torsional spring mechanism with the matched measuring range in a matched mode, and high-precision rotational inertia measurement is achieved by selecting torsional springs with different measuring ranges in a self-adaptive mode.

Description

Technical field [0001] The present invention relates to the field of mechanical design and testing, in particular, to an adaptive high-precision moment of inertia measurement device. Background [0002] Moment of inertia measurement has important applications in scientific experiments, engineering technology, aerospace, machinery and other industries. With the continuous improvement of aircraft performance, the quality characteristics measurement technology of aircraft has received more and more attention. For high-speed aircraft, the inertia of inertia is abnormal, which will require more ability to control the flight direction and attitude, which will easily cause the aircraft to deviate from the ballistic trajectory. [0003] The existing measurement methods consist of the compound pendulum method, the falling body method, the three-line torsion method, the single-line torsional pendulum method, and the mass line method. The polylobetic method is not suitable for large objects...

AI Technical Summary

Problems solved by technology

The compound pendulum method is not suitable for larger objects and needs to accurately measure the center of mass of the object. The falling body method and the single-line torsion pendulum method are suitable for the construction of symmetrical distributions. The calculation of the three-line torsion method and the mass line method is complicated.

[0004] According to the existing technology search, the Chinese invention patent publication number is CN106338325A, which discloses a method for measuring the mass and moment of inertia in three directions of a small satellite, but the test device and scheme are relatively complicated

The Chinese invention patent publication number is CN102692264A, which discloses a measurement method for mass, center of mass and moment of inertia, but the measurement method has large errors

CN206945219U discloses a kind of moment of inertia measuring instrument, but it is difficult to meet the measurement of high precision and wide range of moment of inertia

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