Microgravity testing device based on quartz flexible accelerometer

Abstract

The invention discloses a microgravity testing device based on a quartz flexible accelerometer. The microgravity testing device comprises a quartz flexible accelerometer assembly, a sampling circuit, a filter circuit, a gating circuit, an analog / digital (A / D) conversion circuit, a communication interface circuit and a field programmable gate array (FPGA) controller. The quartz flexible accelerometer assembly comprises the quartz flexible accelerometer and a temperature control system which comprises a temperature control circuit, a heating element, a heat preservation cover, an installation base body and a base. The microgravity testing device based on the quartz flexible accelerometer has the advantages of being low in noise, large in range, wide in transmission band, and capable of avoiding data loss caused by frame dropping, frame emptying, frame repetition, error codes and the like, and improving reliability of data.

Description

technical field [0001] The invention relates to a microgravity test device, in particular to a microgravity test device based on a quartz flexible accelerometer, which belongs to the technical field of space microgravity measurement. Background technique [0002] The microgravity acceleration on space vehicles includes quasi-steady-state acceleration, transient acceleration and vibration acceleration. 1) Quasi-steady-state acceleration: the change frequency is not more than 0.01Hz, generally not more than 10 -6 g. The main causes of quasi-steady-state acceleration are atmospheric resistance, tidal force, solar radiation pressure, etc.; 2) Transient acceleration: the value of transient acceleration is generally within 10 -4 g. The main causes of transient acceleration include spacecraft orbit change thrust, orbit control and attitude control thrust, spacecraft auxiliary equipment and payload actions, astronaut activities, etc.; 3) Vibration acceleration: the value of vibrati...

AI Technical Summary

Problems solved by technology

[0004] The existing microgravity measurement device has a small range and a narrow passband. Due to the mixed microgravity data of the spacecraft, the device is prone to data loss due to frame loss, empty frames, reframes, and error codes during data transmission, and the data is reliable. Sex is not high

At the same time, because the accelerometer is not designed to be sealed, when the device operates in space for a long time, the accuracy of the accelerometer will decrease with the change of gas pressure. At the same time, the ambient temperature of the device will change drastically during the orbital operation stage, and the accuracy of the accelerometer will drop significantly when the temperature changes.

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