A process for the iterative error compensation of sin / cos - position measuring systems according to offset -, amplitudes - and phase error

摘要

A process for the evaluation of sin / cos - position measuring systems with iterative error compensation with the following method steps:– Determination of measured values of the cosine - track (x) and the sine - track (y) per signal period, wherein a number of n = 2^Z Measured values per signal period is determined, and wherein a plurality of equidistant measured values per signal period is determined,– Estimating of offset error (x₀, y₀) and / or amplitude errors (a / b) and / or phase error (δφ) or of variables proportional thereto from the measured values determined with a fourier analysis, wherein– Fourier coefficients for the fundamental wave and for the first harmonic are determined and– Offset error (x₀, y₀) essentially of the fourier coefficients of the fundamental oscillation are determined and,– Amplitude error (a / b) and / or phase error (δφ) consisting essentially of the fourier coefficients of the first harmonic can be determined, where the– respective estimated error by iterative use of the fourier analysis to approximately exact correction values can be refined and wherein– the compensation of the specific fault parameter (x₀, y₀, a / b,..