Please use this identifier to cite or link to this item: https://doi.org/10.1109/TIM.2002.806028
Title: New interpolation method for quadrature encoder signals
Authors: Tan, K.K. 
Zhou, H.X. 
Lee, T.H. 
Keywords: Encoder resolution
Interpolation errors
Look-up tables
Measurement interpolation
Quadrature encoder signals
Issue Date: Oct-2002
Source: Tan, K.K., Zhou, H.X., Lee, T.H. (2002-10). New interpolation method for quadrature encoder signals. IEEE Transactions on Instrumentation and Measurement 51 (5) : 1073-1079. ScholarBank@NUS Repository. https://doi.org/10.1109/TIM.2002.806028
Abstract: This paper presents a new interpolation method suitable for increasing the measurement resolution obtainable from quadrature encoder signals. Based on the existing sinusoidal signals, high-order sinusoids can be derived, from which binary pulses can be generated, which can be decoded using only standard servo controllers for position information. A look-up table, constructed off-line, serves as the inferencing engine for the proposed method. Imperfections in the encoder signals can be directly compensated for in the look-up table, including mean and phase offsets, amplitude difference, and waveform distortion. Simulation and experimental results are provided in this paper.
Source Title: IEEE Transactions on Instrumentation and Measurement
URI: http://scholarbank.nus.edu.sg/handle/10635/56800
ISSN: 00189456
DOI: 10.1109/TIM.2002.806028
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