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Headbox is the key component in a paper machine which has a significant effect on product quality. In this paper, a hybrid model which combines mixing tank and air-cushioned headbox is proposed. In the hybrid model, the mixing tank is taken into consideration, which makes the consistency of pulp controllable. An internal model controller with both good control effect and strong robustness is designed...
Inverse response processes are difficult to be controlled due to presence of right half plant (RHP) zeros. In this paper, firstly the RHP zeros are approximated to the form of dead time in terms of Pade approximation theory. Thus, the controlled processes can be regarded as general stable processes plus dead time without RHP zeros. Then based on the internal model control (IMC) structure, an analytical...
In this paper, an analytical design method is developed for the mismatched Smith predictor on the basis of the internal model control (IMC) method. Design formulas are given and design procedure is significantly simplified. One important merit of the proposed method is that the response of the closed loop system can be easily adjusted. The relation between the controller parameter and the system response...
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