Abstract
The article is devoted to the development of a calibration method for the goniometric system, which includes accelerometers. The complexity of the technological process of mechanical calibration of accelerometers was noted. It is proposed to apply software-algorithmic correction of measurement results. A mathematical model of signals of an accelerometer converter is described, which takes into account the influence of measurement errors. It is noted that in order to find the parameters of the mathematical model of an accelerometer signal, it is necessary to perform calibration. A mathematical model and the principle of calibration of the misalignment angle of the axes of the accelerometer are proposed and described. To evaluate the effectiveness of the proposed calibration method, experimental studies and data processing of the accelerometer were carried. As a result of experimental studies, an estimation of the degree of error compensation of the ADIS 16534 accelerometer measurements was performed with the application of the modified multi-position calibration method and the calibration method proposed by the authors of this article.
Highlights
The use of modern microprocessor signal processing devices and high accuracy of microelectromechanical (MEMS) sensors allow the development of precision measurement systems.Since the MEMS accelerometer is an electromechanical device, after initial adjustment and installation in the goniometric control system, a static "load" continues to operate on the device
The most convenient and expedient is the path of program-algorithmic correction of the results of measurements of acceleration projections, i.e. output signals of accelerometers, based on mathematical models that take into account possible angular deviations of the base axes
To evaluate the effectiveness of the proposed method, experimental studies and data processing of the accelerometer were carried out based on two methods of calibration: the proposed in this article and the modified multi-position method (MMPM) [10]
Summary
The use of modern microprocessor signal processing devices and high accuracy of microelectromechanical (MEMS) sensors allow the development of precision measurement systems. Since the MEMS accelerometer is an electromechanical device, after initial adjustment and installation in the goniometric control system, a static "load" continues to operate on the device. This causes a change in the sensitivity of the measurements and the displacement of the zero level of the goniometer. The most convenient and expedient is the path of program-algorithmic correction of the results of measurements of acceleration projections, i.e. output signals of accelerometers, based on mathematical models that take into account possible angular deviations of the base axes. The aim of this work is to develop of a simple method for calibrating accelerometers by means of algorithms for processing a small set of measurements under the action of gravity acceleration
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