This paper combines zero phase error tacking controller and disturbance observer and proposes the robust designing method suitable for high performance CNC system.

Minimum entropy deconvolution using zero phase restriction;

Variable gain zero phase H_∞ robust tracking control for linear servo system;

Aiming at the problem of phase error caused by normal filters in signal processing , summarizes the important meaning of digital filtering with zero phase error.

Up to the present, all published vibration drilling chip breaking theories considered that in zero-phase-difference axial vibration drilling, chip breaking was impossible.

An adaptive zero-phase tracking control algorithm is developed, and with which the servo system is able to track accurately a given non-circular high order special curves.

Several important characteristics as zero-phased,addictivity as to sampling sequence in frequency domain and formative multiresolution a.

This paper introduces the basic theory and methods of McClellan transformation in designing zero-phase FIR digital filters,simulats the filters by experiment.

New class of ternary two dimensional array sets with a zero correlation zone;

Based on Hayashi s construction,a new approach to the construction of binary sequence set with zero correlation zone is presented by using ideal binary two level autocorrelation sequences and orthogonal sequences.

Based on perfect array pair and orthogonal matrix, ZCZ array pairs set with certain vol-ume, family size and zero correlation zone can be synthesized through row or column interleaved technique when suitable shift sequences are selected.