| QFT control based on zero phase error compensation for flight simulator |
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| 作者单位： | Liu Jinkun（Dept. of Automatic Automatic Control, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, P. R. China） ;
He Yuzhu（Dept. of Engineering System of Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, P. R. China） ; |
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| 摘 要： | To improve the robustness of high-precision servo systems, quantitative feedback theory (QFT) which aims to achieve a desired robust design over a specified region of plant uncertainty is proposed. The robust design problem can be solved using QFT but it fails to guarantee a high precision tracking. This problem is solved by a robust digital QFT control scheme based on zero phase error (ZPE) feed forward compensation. This scheme consists of two parts: a QFT controller in the closed-loop system and a ZPE feed-forward compensator. Digital QFT controller is designed to overcome the uncertainties in the system. Digital ZPE feed forward controller is used to improve the tracking precision. Simulation and real-time examples for flight simulator servo system indicate that this control scheme can guarantee both high robust performance and high position tracking precision.
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| 收稿时间： | 21 June 2005. |
QFT control based on zero phase error compensation for flight simulator |
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| Authors: | Liu Jinkun He Yuzhu |
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| Institution: | 1. Dept. of Automatic Automatic Control, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, P. R. China
2. Dept. of Engineering System of Engineering, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, P. R. China |
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| Abstract: | To improve the robustness of high-precision servo systems, quantitative feedback theory (QFT) which aims to achieve a desired robust design over a specified region of plant uncertainty is proposed. The robust design problem can be solved using QFT but it fails to guarantee a high precision tracking. This problem is solved by a robust digital QFT control scheme based on zero phase error (ZPE) feed forward compensation. This scheme consists of two parts: a QFT controller in the closed-loop system and a ZPE feed-forward compensator. Digital QFT controller is designed to overcome the uncertainties in the system. Digital ZPE feed forward controller is used to improve the tracking precision. Simulation and real-time examples for flight simulator servo system indicate that this control scheme can guarantee both high robust performance and high position tracking precision. |
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| Keywords: | Quantitative feedback theory Zero phase error Feed forward compensation Servo system Flight simulator |
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