Cyclostationary Analysis of Angular Measuring System Error of Threeaxis Mechnical Turntable
SU Baok · 2002
Cyclostationary signal theory and its auto -correlation function and spectrum characteristics are introduced .cyclic auto-correlation function is analysed to distinguish the Cyclostationary signal in signal processing. Manufacturing and installation errors of an inductosyn result in the angular measuring system errors of a turntable. Error signals are analysed and tested to be as Cyclostationary signals, theory is provided to reconstruct angular measuring system errors by wavelet analysis. Error signals are decomposed and reconstructed by db3 wavelet .reconstructed normal variation is less than angular measuring system precision, reconstructed signals are used to compensate the system errors instead of original error signals.