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This paper presents an approach for the improvement of the accuracy of absolute magnetic encoders (AME). The encoders comprise the following two magnets: a multipolar magnet to increase the resolution and the accuracy, and a center-located bipolar magnet for the calculation of the absolute angle. The multipolar signal processing is crucial for the increasing of the encoder accuracy; however, the multipolar...
The signals of magnetic encoders (MEs) are a pair sinusoidal waves: a sine wave and a cosine wave. Due to many different causes, they contain error factors such as offsets, amplitude differences, phase shifts, and random noise. This paper proposes auto-calibration and noise-reduction methods to reduce these errors and to estimate the positions of MEs. This method includes auto-calibration and adaptive-bandwidth...
This paper presents a method for the improvement of the performance of a gear-system-based battery-less multiturn absolute magnetic encoder (BLMA-ME). these encoders, the magnetic absolute encoder requires several sub-shafts and gear systems for the detection of multiple rotations. This paper describes some of the problems of the encoder for which a gear system is used, and a method to increase the...
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