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This paper proposes an analytical design method for the linear multivariable non-square systems with multiple time delays and nonminimum-phase zeros. Based on Internal Model Control (IMC) theory, a multivariable non-square controller of full matrix form is designed for the non-square processes. In the controller design procedure, a simple method is presented to factor the transfer function matrix...
In this paper, a recently proposed multivariable Smith predictor scheme is modified, which leads to the remarkable improvement of regulatory capacity for both servo and regulatory performance. In the proposed scheme, a disturbance estimator is utilized to construct the closed-loop between the plant inputs and outputs for load disturbance rejection. As a result, the nominal set-point responses are...
This paper proposes a new analytical method for multivariable control design for a class of stable linear multi-input-multi-output (MIMO) processes. By using the unity feedback structure, a multivariable controller with full matrix form is derived based on internal model control (IMC) theory. The proposed design approach provides a single adjustable parameter for each control loop. Two analytical...
A new analytical non-diagonal PID controller design method is proposed for industrial and chemical two-by-two processes with time delays. By extending the concept of coupling matrix for uncertain multivariable delay-free processes to TITO processes with time delays, the relation between the non-diagonal and the diagonal elements of decoupling controller is determined and the controller is derived...
The goal of this brief is to provide a solution to the optimal design problem of decoupled multivariable Smith Predictor for general linear stable plants with multiple time delays. The design procedure is divided into three steps. In the first step, a nonsquare plant is factored into the "delay free" part and delay part, and the "delay free" part is further factored into minimum...
A two-degree-of-freedom ratio control scheme is proposed in this paper. The ratio control system includes two control loops, both of which have two-degree-of-freedom control structure so that the setpoint response could be decoupled from the disturbance response. In order to achieve perfect ratio control both at the steady states and during the transients caused by setpoint and load disturbance changes,...
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