Dead-Time Pseudo-Compensation for Improvement of Accurate Characteristics of a Continuous Control System with Correction According CP a Smith Predictor

Abstract

This paper describes the use of a cascade compensator constructed according to a Smith scheme in the forward loop of a system being designed for the purpose of analyzing the quality of processes in steady states. This can be effectively used to solve the problem of providing the system with a required reserve of stability by placing a dead-time element outside a closed loop. The dead-time effect manifests only when the transient time increases by the value of dead time with no changes in the overshoot value. It is determined that the velocity Q-factor of the system with a cascade compensator constructed according to a Smith scheme theoretically cannot be larger than the reciprocal of the dead time. This paper also demonstrates the possibility of reducing this negative property of the cascade compensator constructed according to a Smith scheme by dead-time pseudo-compensation with the use of differentiating elements.