三軸磁強(qiáng)計(jì)測(cè)量誤差修正方法

The error correction of three-axis magnetometer measurement

摘要: 三軸磁強(qiáng)計(jì)測(cè)量誤差修正對(duì)衛(wèi)星姿態(tài)確定和控制具有重要意義。文章針對(duì)三軸磁強(qiáng)計(jì)測(cè)量誤差的來(lái)源進(jìn)行理論分析，引入磁場(chǎng)輸入引起的常值漂移，建立了三軸磁強(qiáng)計(jì)測(cè)量誤差修正模型，并基于該模型在磁環(huán)境模擬器中對(duì)Honeywell公司的三軸磁強(qiáng)計(jì)（HMR2300R）進(jìn)行標(biāo)定。實(shí)驗(yàn)結(jié)果表明改進(jìn)模型可以將測(cè)量誤差控制在50 nT以?xún)?nèi)，滿(mǎn)足低成本敏感器在微小衛(wèi)星姿態(tài)確定中的應(yīng)用要求。

Abstract: The error correction of three-axis magnetometer measurement is of great importance to satellite attitude determination and control. In this paper, the error sources of three-axis magnetometer measurement are theoretically analyzed. Considering the case of constant shift caused by the magnetic input, an error correction model is proposed, with which the three-axis magnetometer HMR2300R made by Honeywell is calibrated and tested in a magnetic simulator. The experimental results show that the error of the three-axis magnetometer measurement can be controlled within 50 nT with the proposed method, which can meet the application requirements for low cost sensors in attitude determination and control of micro-satellites.