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This paper presents a new simplified approach for the design of dead time compensators for processes with long dead time. The approach is based on a modified structure of the Smith predictor that allows to isolate the disturbance and set-point responses and thereby, providing two-degree-of-freedom control scheme. The proposed structure is easy to analyze and tune. Using an estimation of the dead time...
In this paper, a design method of PI (-D) controllers for delay time processes is proposed. Unlike reduced-order-model based tuning methods, the desired closed-loop response can be accomplished regardless of process order and damping nature. The success of the proposed algorithm is based on the solution of the linear equations which are obtained from the characteristic equation and sensitivity function...
This article discusses the problem of determining the parameter sets of stabilizing PID controllers for first-order plus double integrating processes with time-delay. The method adopted in the article is based on a version of Hermite-Biehler theorem valid for quasi-polynomial and a graphical stability criterion for time-delay systems. The admissible range of proportional-gain is first derived. Then,...
This paper presents a new methodology to design multivariable PID controllers for two-input and two-output systems. The proposed control strategy, which is centralized, combines four PID controllers plus two possible delays and two P controllers. The proportional gains in the P controllers act as tuning parameters in order to modify the behavior of the loops almost independently. The design procedure...
This paper proposes a new control design method for a continuous-time system with time-delay based on the way of designing generalized minimum variance control (GMVC). In addition, it is shown that the method which internal model principle was used for as the technique to remove offsets is effective.
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