Devices and methods for measuring high speed momentum wheel rotating speed

Abstract

The invention discloses a high-speed momentum wheel rotational speed test device and a method thereof, and the test device is mainly composed of a standard metal electromagnetic shielding chassis, an AT96 bus motherboard, an AT96 bus AC / DC power supply board, an AT96 bus CPU board, an AT96 bus momentum wheel pulse acquisition board. Momentum wheel rotational speed pulses are acquired by the AT96 bus motherboard, pulse signals are stored in registers, then data of all 24 registers of the acquisition board in a sampling period are respectively read by the AT96 bus CPU board, and the stable rotational speed value of a momentum wheel can be obtained by carrying out the arithmetic processing. The test device and the method have the advantages that the test device can prevent the electromagnetic interference; the board devices have strong universality and simple maintenance; the momentum wheel pulse acquisition board acquires the data, the bus CPU processes the data, thereby obtaining the stable rotational speed value of the momentum wheel; the rotational speed of the momentum wheel can be precisely calculated, thereby avoiding the errors caused by installation process errors; the test device has maintainability, replaceability and is compatible with standard common software, thereby facilitating the software development; the communication speed is high, thereby ensuring the timeliness of the obtained calculated data.

Description

technical field [0001] The invention relates to the field of monitoring and measurement, in particular to a high-speed momentum wheel rotation speed measuring device. Background technique [0002] The momentum wheel is an important part of the satellite GNC subsystem. When measuring the satellite GNC subsystem, it is necessary to collect the speed signal and direction signal of the momentum wheel. The characteristic of the rotational speed signal of the momentum wheel is a digital pulse signal, and the magnitude of the rotational speed of the momentum wheel is reflected by the magnitude of the pulse frequency. [0003] 24 Hall elements are installed in the momentum wheel housing, and 24 pulse signals are sent out every time the momentum wheel rotates. The original momentum wheel measurement equipment adopts continuous pulse counting, that is, every time the momentum wheel rotates, the measurement equipment will continuously record 24 pulse signals, and calculate the rotatio...

AI Technical Summary

Problems solved by technology

[0004] The problem with the original measurement equipment and measurement method is that the 24 Hall elements are distributed and installed in the circumference. Due to the process error, the installation of the 24 Hall elements is often uneven, and the error is very random, resulting in continuous counting. 24 pulses cannot reflect the real momentum wheel speed

Therefore, the original measuring equipment will have measurement errors

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