【作者】 陈克明；

【导师】 谭思云；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2006， 硕士

【摘要】 时滞系统是一种在工业生产中广泛存在的系统,因而时滞系统的控制也是控制理论应用的一个重要领域。由于时滞对控制量输出的纯延迟作用,使得控制系统在超调量、静差及稳定性等控制性能方面显著地变坏。控制专家们对其进行了多年的研究,但至今尚未得出能在实际应用中对时滞系统进行有效控制的方法,因而它被公认为是一种较难控制的对象。 模糊控制作为智能控制中一种重要而有效的方法,以模糊集合理论为基础,直接从专家的控制经验中总结得出有效的控制规则,特别是对于参数波动和负载干扰的影响,模糊控制具有较强的鲁棒性,从而为时滞系统控制方法的研究开辟了新的途径。 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,本文将模糊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,通过对比分析几种常规时滞控制方法,解析说明了常规控制方法鲁棒性较差。烘胎房温湿度控制系统是一个复杂系统,难以建立系统的数学模型,采常规控制方法难以获得满意的控制效果。本文中以烘胎房温度、湿度控制系统为研究对象,进行试验仿真,试验仿真结果证实了模糊控制PID控制器的控制效果优于常规PID控制器,模糊PID控制器完全能够实现对烘胎房温度、湿度的有效控制。另外,文章还给出了烘胎房温度、湿度控制器的硬件结构以及软件算法。更多还原

【Abstract】 The time-delay system is a kind of system existing in industrial production so extensively that it is seen as an important field in which the control theory is employed to. As we know, because of the system’s delay function to the output of control value, it makes the control value unable to reflect the controlled object timely. As a result, this may makes some control properties of the control system become worse in terms of super-regulating value, the steady-state error and stability, etc. Although the expert go on research on this aspect for many years, so far effective methods which can be used in practical application are not found yet. Therefore, the time-delay system is recognized as a kind of system difficult to control.Regarded as one of important and effective embranchment in the intellectual control field, fuzzy logic control based on the theory of fuzzy sets and its control rule can be summarized from control experts’ experience directly. Especially, fuzzy control has high robustness for the parameter’s fluctuation and the load’s disturbance. All those merits enable the fuzzy control become a new route to the research on the methods of controlling the time-delay system.Time-delay system is the important field for the application of the control theory. In this paper, fuzzy logic control for time-delay system is introduced in order to improve the robustness of the general time-delay control system. Firstly, this paper analyzes the dynamic performance of time-delay. And through comparing and analyzing several kinds of routine time-delay control system, prove that general control schemes for time-delay system is inefficient.It is a complicated system to the storeroom for the tyre mold. It is difficult to set up systematic mathematical model, so it’s difficult to adopt routine control method to win the satisfied control result. In this paper the temperature and humidity of the storeroom for the tyre mold are choosed as control objects. Through experimental emulations, it proves that the result of fuzzy logic PID controller is superior to that of regular PID controller. It also validates that fuzzy logic PID controller can have an effective control to the temperature and humidity of the storeroom. In addition, the article provides the hardware structure and software algorithm of the control of the storeroom for the tyre mold’ temperature and humidity.更多还原