Device and method for measuring rotational inertia of satellite

Abstract

The invention discloses a device and method for measuring rotational inertia of a satellite based on a torsional pendulum method and a compound pendulum method in principle and relates to the technical field of rotational inertia measuring.The device comprises a machine body, a rotary pre-twisting mechanism mounted on the top of the machine body and a workbench mounted on the top of the rotary pre-twisting mechanism.The rotary pre-twisting mechanism comprises a twisted bar, wherein the bottom end of the twisted bar is fixed to the machine body, and the top end of the twisted bar is fixed to the workbench. Fixed supporting frames are mounted on the workbench. Swing mechanisms are rotationally mounted on the fixed supporting frames through rotary shaft assemblies. A rotatable supporting rotation device is mounted on the swing mechanism.After the satellite is mounted on the supporting rotation device, the workbench and the swing mechanisms do Y-direction reciprocating swing periodic motion under the action of restoring force of the twisted bar, the swing mechanisms do X / Z-direction reciprocating swing periodic motion under the action of elastic restoring force of a tension spring and gravity of itself, the rotational inertia of the satellite in three directions can be calculated by measuring the swing periods in the Y-direction and the X / Z-direction, and measurement is convenient and fast.

Description

technical field [0001] The invention relates to the technical field of moment of inertia measurement, in particular to a device and method for measuring moment of inertia of a satellite. Background technique [0002] The moment of inertia of the satellite is measured to make it meet the requirements of carrying and attitude control. Satellites are usually connected to flowerpot-like structural parts on one side, and there are no docking interfaces on the other sides. Therefore, when measuring the moment of inertia in the other two directions, it is necessary to use special tooling to realize the transformation of its attitude ( Turn over), then hoist and install on the L-shaped bracket for testing. [0003] It can be seen that, with the existing testing device, simultaneous measurement of moment of inertia in three directions cannot be realized in one clamping. Moreover, the above test device needs to be hoisted repeatedly on various devices, which may easily cause safety ...

AI Technical Summary

Problems solved by technology

[0003] It can be seen that with the existing test device, it is impossible to realize the simultaneous measurement of the moment of inertia in three directions in one clamping

Moreover, the use of the above-mentioned test device requires repeated hoisting on various devices, which is likely to cause safety hazards, lengthen the test cycle, and increase the test cost.

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