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This paper presents a proportional integral derivative controller design method for the industrial process plant. The industrial process plant is represented by a second-order plus delay-time system. In order to simplify controller design, a pole compensation scheme is proposed to tune the controller parameters. By using the pole compensation to the system dynamic time constant, some controller parameters...
This paper proposes a design method of the proportional integral derivative controller. The controller is used to a delay-time system. A polynomial approximation method is studied to the delay-time system. The controller is designed based on the approximation model and used to the delay-time system. Some numerical examples are illustrated to show the effective of the proposed method.
Wood chips properties variation is known as a source to provoke variability in thermo-mechamical pulping processes. This mainly includes density, moisture content and brightness of the chips as the raw materials that result in consuming more refining energy and bleaching agent as well as degrading product quality. To date, no concrete control strategy has been proposed to reject the effect of the...
In this paper, the correlation between process variability attenuation and efficiency enhancement in industrial processes is studied. The starting hypothesis of this work states that process variability attenuation brings about efficiency enhancements in both energy and productivity aspects. To test the hypothesis, a multi-variable statistical approach requiring no process model is proposed. The approach...
The objective of this work is to scrutinize the impact of wood chips properties (WCP) variation on process variability in a thermo-mechanical pulping process in pulp and paper industry. The starting hypothesis states that by reducing WCP variation, process variability is mitigated that results in energy efficiency and product quality enhancements. Process data during two months of continuous operation...
For the input-output representation of non-uniformly multirate discrete-time systems, a coupled least squares algorithm is derived to estimate the model parameters with the advantage of avoiding the computation of matrix inversion. Moreover, The proposed algorithm has good convergence properties. The simulation test verifies the effectiveness of the algorithm.
The reaction discussed in this paper is a complicated, multi-phase-catalyzed batch reaction to produce phenyl-pyretic acid by double carbonylation of benzyl chloride. In order to industrialize the production process, a significant engineering problem is to study the operation and control of this batch process. The first stage of study in this paper is to process the experimental data, then to build...
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