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首页> 外文会议>International Symposium on Communications and Information Technologies(ISCIT 2005) vol.1; 20051012-14; Beijgin(CN) >The Application of Fuzzy Control Strategy in Electro-hydraulic Servo System
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The Application of Fuzzy Control Strategy in Electro-hydraulic Servo System

机译：模糊控制策略在电液伺服系统中的应用

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摘要

This paper presents a fuzzy tracking control methodology for electro-hydraulic servo system from the viewpoint of industrial application and implementation. Since the hydraulic control systems always have the high nonlinearity and uncertain dynamics, the simple linear or nonlinear differential equations can not sufficiently represent corresponding practical system. And many conventional control methods based on mathematical models are limited in their abilities to improve the tracking performance. The solution in this study is to develop a new nonlinear hybrid controller composed of a classical PID controller and a fuzzy controller based on self-adjusting modifying factor, which greatly improves the robustness, the dynamic and static properties of the system. Additionally, the fuzzy switching mode is employed to avoid the undesirable disturbances caused by the switchover between the two control methods. The proposed fuzzy controller shows excellent robustness against variations of system parameters and external disturbances through a series of simulation studies. Finally, by experiments on a practical electro-hydraulic servo test bench, the effectiveness of this control scheme is verified by comparison with the classical PID or fixed fuzzy controller. The research results show that the hybrid fuzzy PID controller has good performance in real time application.
机译：从工业应用和实现的角度出发，提出了一种电动液压伺服系统的模糊跟踪控制方法。由于液压控制系统始终具有较高的非线性和不确定的动力学特性，因此简单的线性或非线性微分方程无法充分代表相应的实际系统。并且许多基于数学模型的常规控制方法在改善跟踪性能方面的能力受到限制。本研究的解决方案是开发一种新的非线性混合控制器，该控制器由经典PID控制器和基于自调节修正因子的模糊控制器组成，可大大提高系统的鲁棒性，动态和静态性能。另外，采用模糊切换模式以避免由两种控制方法之间的切换引起的不期望的干扰。通过一系列仿真研究，所提出的模糊控制器对系统参数变化和外部干扰表现出出色的鲁棒性。最后，通过在实际的电液伺服试验台上进行实验，通过与经典PID或固定模糊控制器进行比较，验证了该控制方案的有效性。研究结果表明，混合模糊PID控制器在实时应用中具有良好的性能。

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