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Article title THE ERRORS OF SIGNALS RESTORATION IN SYSTEMS MANAGEMENT AND CONTROL
Authors L.K. Samoilov, I.I. Turulin, S.A. Kirakosyan, A.D. Vartenkov
Section SECTION I. HYDROACOUSTICS, ANTENNAS AND SIGNAL PROCESSING
Month, Year 01, 2014 @en
Index UDC 621.82: 621.397
DOI
Abstract Frequency of digitization of a control system and the control gets out as a result of the decision of a direct or return problem of distribution of errors of all system. At the decision of a direct problem errors of the device of digitization and an error of the device of restoration are allocated. Accordingly distinguish frequency of digitization from the point of view of procedure of digitization and restoration procedure. It is necessary to consider as an optimum variant a situation when frequency of digitization from the point of view of digitization procedure will be equal to frequency of digitization from the point of view of restoration procedure. Such decision can be found in an iterative cycle with redistribution of errors. In article making errors of restoration that will allow to organise such iterative cycle are considered. The error of the device of restoration consists of a methodical error of restoration, an error of digital restoration (redigitization), an error of extrapolation of a zero order on the basis of DAC and errors of analogue filters of the bottom frequencies. The choice of frequency of digitization is influenced also by tool errors of the device of restoration. In control systems the error at the expense of an information delay in the restoration device is added. In article the specified errors of the three-stage device of restoration are considered. It is shown, that value of working frequency of the device of digital restoration does not influence size of a methodical error of restoration. The increase in working frequency of the device of digital restoration reduces a signal delay in eksirapolyator on the basis of DAC, that indirectly reduces an error at the expense of an information delay. Estimations of errors of the devices, allowing to choose demanded frequency of digitization are given.

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Keywords Sampling frequency; signal restoration; signal delay; cutoff frequency; control systems.
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