时滞系统的控制方法研究

【作者】 姜会霞；

【导师】 肖雁鸿；

【作者基本信息】 湖南大学 ， 控制理论与控制工程， 2002， 硕士

【摘要】 时滞系统的控制是控制理论应用的一个重要领域，为了提高常规时滞控制系统的鲁棒性能，本文将智能控制和变结构控制引入到时滞系统的控制中。论文首先分析了滞后环节对系统性能的影响，讨论了几种常规控制方法，解析说明了常规控制方法鲁棒性能较差。Smith控制是基于模型的补偿控制，但其对参数变化较为敏感。模糊控制无需对象精确数学模型，但是直接应用于大滞后系统较为困难。因此本文将模糊控制与Smith控制相结合，提出了几种针对大纯滞后系统的模糊自适应控制算法。变结构控制控制对系统参数和外部扰动的不确定性具有较强的鲁棒性，为了充分利用变结构控制这一突出优点，论文分别研究了状态存在滞后和控制存在滞后的时滞系统的变结构控制。仿真研究均说明了所设计的模糊自适应控制算法和变结构控制算法的有效性。最后论文讨论了电厂锅炉过热汽温的模糊控制系统，并设计了其硬件电路实现图。更多还原

【Abstract】 Time-delay system is the important field for the application of the control theory. In this paper, intelligent control and variable structure control for time-delay system is introduced in order to increase the robustness of the general time-delay control system. Firstly, this paper analyzes the dynamic performance of time-delay, discusses the insufficiency of some general control schemes for time-delay. Smith controller is a kind of compensation control based on plant model, but it is sensitive to the variance of parameter. Fuzzy control does not require accurate plant model, but it can not be directly applied for time-delay system. Therefore, this paper presents some new fuzzy adaptive approaches to time-delay systems, which combines fuzzy control and Smith control. Variable structure control is robust to parameter and external disturbance uncertainty, so state-delay system and input-delay system by variable structure sliding mode control are studied in this paper .The result of simulation shows that the designed fuzzy adaptive controller and sliding mode controller are effective. In the end, the control system and its hardware diagram for steam-gas temperature of boiler in the power plant is designed.更多还原