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A new two degree-of-freedom decoupling control scheme is proposed for Two-by-two systems with multiple time delays and integrators. Its' main feature is that the disturbance responses are decoupled from the set-point responses. Firstly an inverse model based decoupler is proposed. Then the set-point tracking controller is analytically derived in terms of the H2 performance specification. The controller...
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...
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...
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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