| Summary: | 碩士 === 國立成功大學 === 化學工程學系 === 90 === The thesis presents the design of digital PID controllers based on pole assignment. The design method determines the proportional, integral, and derivative gains for three types of control structures by adjusting the position of two dominant poles on the z-plane. Due to the reduction of the tuning parameters, the optimal controller parameters for setpoint changes and load disturbances can be found rapidly by minimizing an objective function subject to certain robustness limitation. The design could result in good performance as well as satisfactory robustness. A simulation study is conducted on first-order, second-order, and high-order systems with time delays. The results are compared with those obtained by the generalized predictive PID controllers. It appears that the proposed digital design has better control performance under the same robustness constraint.
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