DELAY PSEUDOCOMPENSATION FOR IMPROVEMENT OF ACCURATE CHARACTERISTICS OF A CONTINUOUS CONTROL SYSTEM WITH CORRECTION ACCORDING TO THE SMITH SCHEME
N. A. Vunder, M. M. Sinetova, A. V. Ushakov
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, 197101, St. Petersburg, prosp. Kronverskii, 49
Keywords: непрерывный объект управления, звено чистого запаздывания, последовательный компенсатор, схема Смита, псевдокомпенсация, алгоритм синтеза, continuous control object, link of pure lag, sequential compensator, Smith scheme, pseudo-compensation, synthesis algorithm
Abstract
The Smith scheme of inclusion of a sequential compensator into a direct branch of a projected system for the analysis of the quality of processes in steady state is under consideration. This scheme is an effective way of solving the problem of providing the system with a required reserve of stability by removing the link of pure delay beyond a closed loop. The effect of delay is only manifested in the fact that the duration of the transient process increases by an amount of delay without changing the overshoot. It is determined that the velocity quality factor of the system with the Smith scheme of inclusion of a sequential compensator cannot theoretically be larger than the reciprocal of the delay. This paper demonstrates the possibility of reducing this negative property of the Smith scheme of inclusion of a sequential compensator by “pseudocompensation” of lag with differentiating links.
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