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Proper control of the wood-drying kiln is crucial to ensure the satisfactory quality of dried wood and in minimizing drying time and energy. This paper investigates the development and evaluation of a robust control system for a wood drying kiln process incorporating variable structure control (VSC) such that the moisture content of lumber will reach and be stabilized at the desired set point. A description...
PH is an important environmental factor to anaerobic bacteria in anaerobic treatment system. Especially in the final anaerobic process stage, the methane bacteria need the optimal PH range from 6.8 to 7.2. According to the nonlinearity and large time-delay of PH control process, a novel method based on fuzzy PID control is proposed here, and corresponding simulations are realized to make comparison...
This paper is aimed at looking into the PID control design of systems with large time-delay. In a preliminary step, the system is modeled by a time-delay second order model. Time constants of the PID controller are determined on the basis of the obtained model using the pole compensation technique. The PID proportional gain results from the minimization of the settling time by the use of genetic algorithms...
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