低松驰预应力钢丝稳定化处理生产线系统控制的研究

【作者】 胡赫尘；

【导师】 陈辉明；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2003， 硕士

【摘要】 低松弛预应力钢丝是一种很有前途的高强度建筑用钢材，本文根据低松弛预应力钢丝稳定化处理生产线的工艺要求，对其电气系统进行了全面、细致的分析，对重要的工艺参数—回火温度的控制进行了详细讨论。主要内容如下： 一、首先根据低松弛预应力钢丝稳定化处理生产线的工艺要求，设计了控制系统的硬件、软件，并且就系统的抗干扰措施进行了讨论。 二、感应加热的过程是一个很复杂的工业过程，它涉及电、磁及热等多种物理过程。文章对系统加热过程的原理进行了分析，然后在保证一定精度的前提下，建立了对象工作点附近的近似模型，采用数值计算的方法模拟了系统的动态特性。 三、利用工业界常用的前馈—串级控制方案，对钢丝回火温度进行控制，取得了较好效果。 四、简介了普通模糊控制器的设计，讨论了一些模糊控制器的改进方案，然后引入了一种参数自调整Fuzzy—PI控制器。仿真结果表明，其控制性能要优于常规的FI控制。 五、CMAC神经网络可以充分逼近任意复杂的非线性关系，可学习和适应不知道或不确定的系统。CMAC神经网络逆模学习控制策略具有鲁棒性强、适应性良好，权值训练时间短等优点。十分适用于参数未知、时变的工业控制工程。更多还原

【Abstract】 Low-relaxation prestressed steel wire is one kind of high degree of strength steels, and it is well used in construction industry. This paper based on the product technics, analysis the electric control system in detail. This thesis focuses on the control of the temper temperature, which is the core technics parameter. This paper contains following parts:The first section: Based on the product technics ,designed the hardware structure and the software. The anti-jamming technique also be discussed.The second section: The process of induce heating is a complex process. After analysis the heating mechanism, this thesis build up an approximate model for the system.The third section: Used the feedforward--cascade control strategy to control the temper temperature, and acquires a good result.The fourth section: Introduced design of the normal fuzzy controller, and produced some improved schemes. After this, this thesis proposed a fuzzy-Pi controller what uses a self-regulating scaling method. The simulation result illustrates that the fuzzy-Pi control is better than the normal PI controller.The five section: The CMAC neural network will approach any complicated nonlinear relationship sufficiently. The network could study some unknown systems. The inverse model learning control strategy of CMAC neural network owned good quality in robustness, adaptability and short rights training time. It is adapt to the industry process which parameter is uncertain or unknown.更多还原