極配置法に基づくデータ駆動型むだ時間補償器の一設計

概要

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PID control schemes have been widely still used in process industries. However, the good control performance might not be obtained by simply using only PID control schemes, since some processes have time variations, uncertain time-delays, and so on. The recursive least square method (RLSM) and the Smith time-delay compensator have been well known as the efficient technology for the time-variant systems and the time-delay systems, respectively. In this paper, a design method of the PID control system with an on-line modelling function and a local-feedback compensator has been proposed. Instead of the RLSM, the data-driven modeling technology is employed to improve both the calculation cost by the needless system identification and the reliability of the estimated parameters, which are indicated in the RLSM. Also, the time-delay compensator is improved in order to employ the pole-assignment method. Finally, the effectiveness of the proposed method is numerically evaluated through applications to process models with time variations and time-delays.
2012-02-01