TY - JOUR
T1 - Total error compensation of non-ideal signal parameters for Moiré encoders
AU - Ye, Guoyong
AU - Xing, Hongwen
AU - Liu, Hui
AU - Li, Yingjiang
AU - Lei, Biao
AU - Niu, Dong
AU - Li, Xuan
AU - Lu, Bingheng
AU - Liu, Hongzhong
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Non-ideal encoder signal parameters generally include amplitude imbalance error, quadrature phase error, dc-offset error and harmonic distortion. These non-ideal signal parameters are the main cause of nonlinear interpolation errors for Moiré encoders. In this paper, a total error compensation strategy for correcting these non-ideal signal parameters is presented. The compensation strategy consists of a passive compensation stage and an active compensation stage, which are realized through hardware and software means, respectively. In the passive compensation stage, an optimized scanning grating with specified micro-pattern is employed to suppress the harmonic distortion. In the active compensation stage, an adaptive compensation algorithm is proposed to compensate the remained amplitude imbalance error, quadrature phase error and dc-offset error. In the experiment, a Moiré encoder using the optimized scanning grating is developed, and a digital circuit is designed by implementing the adaptive compensation algorithm into a field-programmable gate array (FPGA). The effectiveness of the total error compensation strategy has been validated by experimental results.
AB - Non-ideal encoder signal parameters generally include amplitude imbalance error, quadrature phase error, dc-offset error and harmonic distortion. These non-ideal signal parameters are the main cause of nonlinear interpolation errors for Moiré encoders. In this paper, a total error compensation strategy for correcting these non-ideal signal parameters is presented. The compensation strategy consists of a passive compensation stage and an active compensation stage, which are realized through hardware and software means, respectively. In the passive compensation stage, an optimized scanning grating with specified micro-pattern is employed to suppress the harmonic distortion. In the active compensation stage, an adaptive compensation algorithm is proposed to compensate the remained amplitude imbalance error, quadrature phase error and dc-offset error. In the experiment, a Moiré encoder using the optimized scanning grating is developed, and a digital circuit is designed by implementing the adaptive compensation algorithm into a field-programmable gate array (FPGA). The effectiveness of the total error compensation strategy has been validated by experimental results.
KW - Moiré encoders
KW - Non-ideal signal parameters
KW - Total error compensation
UR - https://www.scopus.com/pages/publications/85071397859
U2 - 10.1016/j.sna.2019.111539
DO - 10.1016/j.sna.2019.111539
M3 - 文章
AN - SCOPUS:85071397859
SN - 0924-4247
VL - 298
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
M1 - 111539
ER -