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모델축소를 이용한 고차계 적분공정의 안정한 PID 동조
李元赫(Won-Hyok Lee),黃炯秀(Hyung-Soo Hwang) 대한전기학회 2007 전기학회논문지 Vol.56 No.11
PID control is windely used to control stable processes, However, its application to integrating processes is less common. In this paper, we proposed a stable PID controller tuning method for integrating processes with time delay using model reduction method. For proposed model reduction method, it disconnect an integrating factor from integrating processes and reduces separate process using reduction method. and it connect an integrating factor to reduced model. We can obtain stable integrating processes using P controller in inner feedback loop and PID tuning is then used to cancel the pole of the feedback loop. This guarantees both robustness and performance. Simulation examples are given to show the good performance of the proposed tuning method comparing with other methods.
적분공정을 위한 민감도 함수 M<SUB>S</SUB>를 이용한 안정된 PID 동조
이원혁(Won-Hyok Lee),황형수(Hyung-Soo Hwang) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
PID control is windely used to control stable processes, however, its application to integrating processes is less common. In this paper, we proposed a simple PID controller tuning method for integrating processes with time delay to meet a sensitive function M<SUB>S</SUB>. With the proposed PID tuning method, we can obtain stable integrating processes using PD controller in inner feedback loop and a loop transfer function with desired stable specification. This guarantees both robustness and performance. Simulation examples are given to show the good performance of the proposed tuning method to other methods.
趙俊浩(Joon-Ho Cho),李元赫(Won-Hyok Lee),黃炯秀(Hyung-Soo Hwang) 대한전기학회 2008 전기학회논문지 Vol.57 No.8
In this paper, we proposed to improve performance of the design of a cascade controller with the smith-predictor structure. The parameters of controller in the inner loop are determined to minimize the integral of time multiplied by the absolute value of error (ITAE) value of performance Index. The controller of outer loop and parameters of Smith-Predictor can be obtain using reduction model. The model reduction is considered that it is the transient response and the steady-state response through the use of nyquist curve. Simulation examples are given to show the better performance of the proposed method than conventional methods.