Fuzzy controller design for parametric controllers

Akgül, Murat; Morgül, Ömer

doi:10.1109/isic.1997.626415

Cited by 8 publications

(2 citation statements)

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“…In addition, the membership functions are searched by genetic algorithm (GA) to perform dynamic decoupling and forge control efforts toward the goals of precision tracking, focusing and zero tilting. In Akgül and Morgül (1997), Hong et al (1992), Visioli (1999), and Hsu and Tsai (1996), the studies describe the tunings on the parameters of the PID or leadlag controller by FLC designs for improving the system responses. From above studies, the main advantage of the FLC is its inherent robustness and ability to handle any nonlinear behavior of the structure.…”

Section: Introductionmentioning

confidence: 99%

Precision positioning of a three-axis optical pickup via a double phase-lead compensator equipped with auto-tuned parameters

2009

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The objective of this study is to design an intelligent control servo scheme for the three-axis optical pickups employed in the next-generation optical disc drives. The three-axis pickup owns the capability to move the lens holder in three directions of focusing, tracking and tilting, which is required particularly for higher datadensity optical disks and precision measuring instruments to annihilate non-zero lens tilting. The intelligent controller utilizes a commercially often-used double phase-lead compensator equipped with the capability of auto-tuning on control parameters. In this way, the model uncertainty of the pickups caused by manufacturing tolerance and the coupling between three different DOFs of the three-axis pickup can be overcome to render desired precision datareading. In the initial stage of the study, Lagrange's equations are employed to derive equations of motion for the lens holder. A double-lead controller equipped with a fuzzy logic parameter tuning algorithm is then designed to perform dynamic decoupling and forge control efforts toward the goals of precision tracking, focusing and zero tilting simultaneously. Along with the controller, a genetic algorithm is developed to search the optimal designed parameters of previously designed auto-tuning algorithm. Finally, the experiments are conducted to show the effectiveness of the controller. With validated performance, the designed intelligent controller is ready to be employed for the next-generation optical disc drives.

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Section: Introductionmentioning

confidence: 99%

Precision positioning of a three-axis optical pickup via a double phase-lead compensator equipped with auto-tuned parameters

2009

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“…Lead/Lag type controllers have been widely used in many industrial applications [1,2]. One of the main issues in computer-aided control system design is to determine the stability of the system with the controller.…”

Section: Introductionmentioning

confidence: 99%

A Linear Programming Approach for Calculation of All Stabilizing Parameters of Lead/Lag Controllers

Jalili

Araabi

2006

Asian Journal of Control

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Lead/Lag controllers are used extensively in industry and there is no straight forward and general solution to the problem of calculating all stabilizing parameters of Lead/Lag controllers. In this paper, a linear programming approach is proposed to calculate all stabilizing parameters of Lead/Lag type controllers for a given continuous-time plant from an arbitrary order. The proposed method is based on the extension of Hermite-Biehler Theorem, which has been proposed for calculating all stabilizing PID gains for a given continues-time system in [6]. The linear programming nature of the proposed approach is its main advantage, which leads to the computer-aided computation of the above problem. The applicability of the method is verified through a numerical example.

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