5 research outputs found

    Quaternion-based AHRS Improved by Inertial Sensor Bias Compensation

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    ์ž์„ธ ๋ฐ ๋ฐฉ์œ„ ๊ฒฐ์ • ์‹œ์Šคํ…œ(AHRS)์€ ์ž์ด๋กœ ๋ฐ”์ด์–ด์Šค๋ฅผ ์ถ”์ •ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๊ฐ€์†๋„๊ณ„ ์„ผ์„œ์™€ ์ง€์ž๊ธฐ ์„ผ์„œ๋ฅผ ์ด์šฉํ•œ๋‹ค. ์ €๊ฐ€์˜ MEMS ๊ฐ€์†๋„๊ณ„์˜ ๊ฒฝ์šฐ ๋ฐ”์ด์–ด์Šค ์•ˆ์ •๋„๋„ ๋‚ฎ์„ ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์ˆ˜์‹ญ mg ์˜ ์ดˆ๊ธฐ ์˜ค์ฐจ๋ฅผ ๊ฐ€์ง„๋‹ค. ์ด๋Ÿฌํ•œ ๊ฐ€์†๋„๊ณ„ ๋ฐ”์ด์–ด์Šค ์˜ค์ฐจ๋Š” ์ €๊ฐ€ MEMS ์„ผ์„œ๋กœ ๊ตฌ์„ฑ๋œ AHRS ์˜ ์ž์„ธ ์ •ํ™•๋„๋ฅผ ๊ฐ์†Œ์‹œํ‚จ๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ์ž์ด๋กœ ๋ฐ”์ด์–ด์Šค๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ๊ฐ€์†๋„๊ณ„ ๋ฐ”์ด์–ด์Šค๋ฅผ ์‹ค์‹œ๊ฐ„ ์ถ”์ •ํ•จ์œผ๋กœ์จ ์ž์„ธ ๋ฐ ๋ฐฉ์œ„๊ฐ์˜ ์ •ํ™•๋„๋ฅผ ํ–ฅ์ƒ์‹œํ‚ค๋Š” ์ฟผํ„ฐ๋‹ˆ์–ธ ๊ธฐ๋ฐ˜ ํ™•์žฅ์นผ๋งŒํ••ํ„ฐ ์•Œ๊ณ ๋ฆฌ๋“ฌ์„ ์ œ์‹œํ•˜๊ณ , ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ํ†ตํ•ด ์ œ์‹œ๋œ ์•Œ๊ณ ๋ฆฌ๋“ฌ์˜ ์„ฑ๋Šฅ์„ ๊ฒ€์ฆํ•œ๋‹ค.Attitude Heading Reference System (AHRS) uses accelerometer and magnetic sensor to compensate gyro bias. A lowcost MEMS grade accelerometer has tens of mg of initial bias as well as low in-run bias stability. This uncorrected initial bias of accelerometer is the main factor to reduce the accuracy of AHRS consisted of MEMS grade inertial sensors. This paper describes the quaternion-based extended Kalman filter algorithm to improve the attitude accuracy by estimating gyro and accelerometer bias together. Simulation results verify the performance of the proposed method.OAIID:oai:osos.snu.ac.kr:snu2012-01/104/0000003405/14SEQ:14PERF_CD:SNU2012-01EVAL_ITEM_CD:104USER_ID:0000003405ADJUST_YN:NEMP_ID:A000360DEPT_CD:446CITE_RATE:0FILENAME:์กฐ์•”_์‹ค์ ์ž๋ฃŒ_2012KSAS์ถ”๊ณ„.pdfDEPT_NM:๊ธฐ๊ณ„ํ•ญ๊ณต๊ณตํ•™๋ถ€EMAIL:[email protected]:
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