Vestnik of Samara State Technical University. Technical Sciences SeriesVestnik of Samara State Technical University. Technical Sciences Series1991-85422712-8938Samara State Technical University1992710.14498/tech.2014.1.%uResearch ArticleImprovement of properties of digital differentiating devices with the small sampling timesStarikovAlexander V(Ph.D. (Techn.)), Associate Professor-BelyaevaIrina SPosrtgraduate Student-JabasovaDaria NPosrtgraduate Student-Samara State Technical University15032014221727710022020Copyright © 2014, Samara State Technical University2014The simplest digital single-loop control systems with the proportional-differential regulator is considered. It is shown that at the small sampling times and the big constants of time of differentiation the factor of transfer of a digital regulator becomes very big and can conflict to digitization process on level and restriction of signals on size. The new way of calculation of the derivative, unlike both simplicity of technical realization, and improvement of properties of digital differentiating devices is offered. Discrete transfer functions of a new digital proportional-differential regulator and considered single-loop system are received. It is shown that the offered way of differentiation allows to improve quality of transients in a digital control system.the digital differentiationdiscrete transfer functiona control systemthe first inverted differencesampling timeцифровое дифференцированиедискретная передаточная функциясистема управленияпервая обратная разностьпериод дискретизации[Микропроцессорные системы автоматического управления / В.А. Бесекерский, Н.Б. Ефимов, С.И. Зиатдинов и др.; Под общ. ред. В.А. Бесекерского. - Л.: Машиностроение, 1988. - 365 с.]