Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
ТHE DIGITAL REGULATOR IN THE CONTROL SYSTEM WITH ASTATISM OF THE SECOND ORDER WITH TIME-LAG
Abstract:
Method of calculation of the system with an astatism the second order, in that a transport delay takes place is considered. The calculation is carried out on one of the indicators of quality a reregulation minimum in the transitional characteristic or the minimum time of transition process. The method is based that the transmission function of the opened system presented as work of transmission functions of the regulator and unchangeable part has the set appearance with the parameters determined by the accepted indicators of quality. Parameters of setting in the transmission function of the system are the amplification of the system factor and constant of time of differentiation of the regulator. The analysis of dependence of the stability reserve of the system from the magnitude of delay and the correlation between a delay, parameters of setting of regulator and indicators of quality is performed. The graphs allowing to calculate the parameters of setting of the regulator according to the accepted indicator of quality considering a set value of delay are shown.
At the beginning of calculation the transmission function of continuous regulator by division of transmission function of the system by the transmission function of the set part is determined, after the continuous transmission function of regulator is converted to its corresponding discrete transmission function. Suppose thus, that the step of quantum of continuous signal on input of regulator into discrete must be chosen by small enough, that a discrete transmission function was continuous.
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References
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