DIGITAL TRACKING SYSTEM WITH A FINITE TIME OF FREE PROCESS COMPLETE DECAY AND A GIVEN ORDER OF ASTATISM
Annotation
A method is proposed for choosing a sequential discrete correcting device of a digital tracking system, which provides both the finite time of free process complete decay and the astatism order 2 or 3. The desired transfer function of the digital tracking system is selected taking into account the requirements of the system roughness and of the order of astatism. At the same time, to simplify the discrete correcting device and exclude "hidden" oscillations at the output of the continuous part of the system between quantization moments, the polynomial numerator of the desired transfer function should be multiplied by the polynomial numerator of the discrete transfer function of the continuous part, even if it does not have zeros greater than or equal to 1 in absolute value. It is proposed to choose the coefficients of the numerator of the desired transfer function of the CSR according to the minimum of the sum of their squares while simultaneously fulfilling the conditions determined by the given astatism order.
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