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Ranjbaran, S., Roudbari, A., Ebadollahi, S.. (1396). A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by Using Accelerometer. فناوری آموزش, 6(1), 1-6. doi: 10.22061/jecei.2018.797
S. Ranjbaran; A. Roudbari; S. Ebadollahi. "A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by Using Accelerometer". فناوری آموزش, 6, 1, 1396, 1-6. doi: 10.22061/jecei.2018.797
Ranjbaran, S., Roudbari, A., Ebadollahi, S.. (1396). 'A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by Using Accelerometer', فناوری آموزش, 6(1), pp. 1-6. doi: 10.22061/jecei.2018.797
Ranjbaran, S., Roudbari, A., Ebadollahi, S.. A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by Using Accelerometer. فناوری آموزش, 1396; 6(1): 1-6. doi: 10.22061/jecei.2018.797

A Simple and Fast Method for Field Calibration of Triaxial Gyroscope by Using Accelerometer

Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 2، دوره 6، شماره 1، فروردین 2018، صفحه 1-6    اصل مقاله (807.83 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2018.797
نویسندگان
S. Ranjbaran* 1؛ A. Roudbari2؛ S. Ebadollahi3
1School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran
2School of Aerospace Engineering, Shahid Sattari University of Aeronautical Engineering, Tehran, Iran
3Iran University of Science and Technology
تاریخ دریافت: 19 بهمن 1395،  تاریخ بازنگری: 01 تیر 1396،  تاریخ پذیرش: 02 آبان 1396 
چکیده
Background and Objectives: Using field calibration methods without precision laboratory equipment, systematic faults of inertial sensors can be reduced and measurement accuracy can be increased.
Methods: In this paper, a simple and fast method called improved least squares is used to find calibration coefficients of an accelerometer including bias, scale factor and non-orthogonality. In this method, this principal is used that the magnitude of acceleration measured by accelerometer in static condition is equal to the magnitude of gravity vector and a cost function is then defined.  Also, in gyroscope field calibration, sensor is rotated manually around all three axes separately and then it is put in the static mode. Changes in the angle obtained from gyroscope at each movement are compared with the ones obtained from the calibrated accelerometer. Calibration coefficients including bias and scale factor are obtained using least squares method.
Results: Simulation results in MATLAB show that the measurement accuracy of accelerometer after calibration has improved by about 60% and the accuracy of the gyroscope has increased by about 40%. Also, comparison with the other methods proves that the proposed method performs well in the accuracy, speed, time required, and the effect of noise changes.
Conclusion: This paper by finding a fast, simple, and low-cost field calibration method to calibrate MEMS accelerometer and gyroscope without using accurate laboratory equipment can help a wide range of industries that use advanced and expensive sensors or use expensive laboratory equipment to calibrate their sensors, to decrease their costs.


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Copyrights
©2018 The author(s). This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, as long as the original authors and source are cited. No permission is required from the authors or the publishers.
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کلیدواژه‌ها
Accelerometer؛ Gyroscope؛ Bias؛ Scale factor؛ Non-orthogonality
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