发明名称 |
METHOD AND APPARATUS OF CORRECTING OUTPUT VALUE OF GEOMAGNETIC SENSOR |
摘要 |
A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a kth output value of the geomagnetic sensor, calculating a kth estimate gain vector based on a k−1th estimate error co-variance and the kth output value, calculating a kth state estimate based on the calculated kth estimate gain vector and the kth output value and a k−1th state estimate, calculating the kth estimate error co-variance using the kth estimate gain vector and a k−1th estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kth state estimate, wherein k is a natural number larger than 1. |
申请公布号 |
US2017059318(A1) |
申请公布日期 |
2017.03.02 |
申请号 |
US201615219993 |
申请日期 |
2016.07.26 |
申请人 |
Magnachip Semiconductor, Ltd. |
发明人 |
KIM Dong Yoon;KIM Byung Ki;PARK Seung Hwan;SHIN Hyung Sik;KI Kyoung Suck;NA Jo An;KIM Young Joon;CHOI Yeon Soo |
分类号 |
G01C17/38 |
主分类号 |
G01C17/38 |
代理机构 |
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代理人 |
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主权项 |
1. A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value, the method comprising:
acquiring a kth output value of the geomagnetic sensor; calculating a kth estimate gain vector based on a k−1th estimate error co-variance and the kth output value; calculating a kth state estimate based on the calculated kth estimate gain vector and the kth output value and a k−1th state estimate; calculating the kth estimate error co-variance using a kth estimate gain vector and the k−1th estimate error co-variance; and correcting the output value of the geomagnetic sensor based on the kth state estimate, wherein k is a natural number larger than 1. |
地址 |
Cheongju-si KR |