Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 125-131 |
| Number of pages | 7 |
| Journal | Journal of Systems Engineering and Electronics |
| Volume | 18 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 2007 |
Keywords
- Feed forward compensation
- Flight simulator
- Quantitative feedback theory
- Servo system
- Zero phase error
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