-
摘要：钢厂轧钢车间对工件进行轧制前需要将工件加热到一定温度，对加热炉各点温度测量后，利用其平均温度作为反馈量，控制燃料流量。此过程存在严重的滞后，常规PID控制超调量较大，不能满足控制要求。
- 上一篇：LabVIEW+51单片机冷库无线智能检测系统设计
- 下一篇：halcon的KUKA机器人视觉定位研究+源代码
为了改善这一情况，本文中介绍史密斯补偿控制，纯滞后补偿控制实在控制系统中某处采取措施，使改变后系统的控制通道以及系统传递函数的分母不含有纯滞后环节，从而改善控制系统的控制性能及稳定性。并且在此基础上增加一个除法器、一个导前微分环节（其中TD=τ）和一个乘法器，得到增益自适应性补偿控制。利用这三个环节根据模型和过程输出信号之间的比值来提供一个自动校正预估器增益的信号。最后利用Matlab/Simulink软件实现控制系统仿真调试。结果证明，采用纯滞后自适应补偿后，既克服了纯滞后时间对控制系统的影响，又对模型的不精确进行了一定的修正。24101
毕业论文关键词： 史密斯补偿；增益自适应性补偿控制；PID控制
Multi-point average furnace temperature control based on Gain adaptive delay compensation
Abstract: Before the workpiece being rolled in the steel mill, it needs to be heated to a certain temperature. After measuring the temperature of the furnace, the average temperature is set as the feedback quantity for controlling the flow of fuel. There is a serious lag in this process, and the overshoot of the general PID control is too large, so it can’t meet the requirements. To improve this situation, Smith compensation control will be introduced in this paper in order to improve the performance and stability of the control in systems by taking measures at somewhere in the control system, after this, the changed channel and the denominator of the system transfer function do not contain pure lags. On this basis, adding a pider, a front differential link (TD=τ) and a multiplier is become the adaptive compensation control. An automatic correction is provided by the ratio of the signal model and process output signal in these three aspects. Finally, using Matlab/Simulink realizes the simulation and debugging of the control system. The results proved that the use of pure lag adaptive compensation, both to overcome the effects of pure delay time of the control system, but also on imprecise model, which must be corrected.
KeyWords: Smith compensation;gain of adaptive compensation control ;PID control
目录
1 绪论1
1.1 研究的目的及意义1
1.2 国内外研究现状与水平1
1.3 过程控制系统简介2
1.3.1 过程控制理论的发展现状2
1.3.2 过程控制系统仿真5
1.4 软件Matlab/Simulink简介7
1.4.1 软件Matlab简介7
1.4.2 软件Simulink简介10
2 加热炉多点平均温度控制系统设计11
2.1 史密斯补偿控制11
2.1.1 纯滞后补偿的基本原理11
2.1.2 史密斯滞后补偿控制12
2.2 加热炉多点温度控制纯滞后补偿系统13
2.3 加热炉多点温度控制纯滞后自适应补偿系统15
3 加热炉多点平均温度系统仿真18
3.1 史密斯补偿控制仿真18
3.2 基于增益自适应纯滞后补偿控制仿真19
4 总结25
谢辞26
参考文献27
1 绪论
1.1 研究的目的及意义
钢厂轧钢车间对工件进行轧制前需要将工件加热到一定温度，对加热炉各点温度测量后，利用其平均温度作为反馈量，控制燃料流量。此过程存在严重的滞后，常规PID控制超调量较大，不能满足控制要求。