大型离心铸造机温度优化控制应用研究

Applications of Temperature Optimization Control of Large Centrifugal Casting Machine

关于大型离心铸造机大多用来生产轧辊,在轧辊生产中,需要进行二次浇注(添芯)等生产工艺过程,要求转速、时间及温度的严格控制配合。但由于大型离心铸造机在生产过程中温度变化的非线性及环境状况的影响,整个过程是一个复杂的传热传质过程,对温度的控制还难以满足需要,致使产品的质量问题很难控制。根据大型卧式离心机生产现场的实际情况,由机理分析结合实验辨识提出了建立温度不确定性模型,并设计了鲁棒H∞控制器,对生产过程的温度进行控制。在MATLAB上建立仿真模型并进行仿真,结果证明设计的合理性和有效性,并保证系统的性能。

Most large-scale centrifugal casting machines are used to produce rolls.In roll production,the secondary cast（Tim core） and other production processes require strict control of speed,time and temperature.However,due to the effects of nonlinear temperature changes in large horizontal centrifuge during the production process and the environmental conditions,the whole process is a complex transfering process of heat and mass,and temperature control is also currently difficult to meet the needs,which results in the difficult controlling for products quality.According to the actual situation of large horizontal centrifuge producting site,the mechanism analysis and experimental identification are combined to establish the temperature uncertainty model,and the robust controller is designed for temperature control of the production process.By using SIMULINK and MATLAB,simulation model is established and the simulation shows that the design is rational and effective.This robust design method,to a certain extent,reduces the complexity of modeling and accuracy requirements,and guarantee performance quality.