精密机床差异化温控系统设计方法与控制策略研究

Study on design method and control strategy of differential temperature control system for precision machine tools

为满足变工况和环境温度波动条件下精密机床各部位对温控系统的动态、差异化控制需求,提出一种精密机床差异化温控系统的设计方法和控制策略。首先,提出了差异化温控系统关键功能部件选型设计方法和温控能力主参数计算方法;其次,根据差异化温控系统高/低温油箱中油温测量值与目标值的差别,形成对两油箱温度的动态实时控制策略;再次,采用MATLAB软件开发出温控系统关键部件的选型设计模块和高/低温油箱温度控制仿真分析模块;最后,通过仿真模拟获取相关温度数据,并与同工况下的实验数据进行对比分析,验证所提出的差异化温控系统设计方法及控制策略的可行性和合理性。结果表明仿真分析模块可以较为切实地反映出实际工况下的温度整体变化情况和趋势。所提出的精密机床差异化温控系统的设计方法和控制策略具备一定的合理性和可行性,且具有较高的工程应用价值。

In order to satisfy dynamic and differentiated control requirements of temperature con-trol system for precision machine tools related parts in the condition of changing running per-formance and fluctuating ambient temperature?the design methods and control strategy of diffe--entiated temperature control system for precision machine tools were provided.Firstly?the meth-od of selecting and designing the key parts of the system and computational method of main pa-rameters of temperature control capability were given.Secondly,dynamic on-time matching strategies for high and low temperature oil tank temperature control were proposed,according to the differences bet ween the targett empera ture and measured tempera ture of high tempera ture oil tank and low temperature oil tank independently.Besides,design module for selection and com-puting of differentiated temperature control system as well as temperature control simulation module for high and low temperature oil tank,were developed based on MATLAB software.Fi-nally,the rationality and feasibility of simulation module were verified by the experimental data,gathering the temperature data in actual situations and comparing the simulation data with the ac-tual data.The examples illustrated that the design methods and control strategies were of reason-ableness.The results of contrast showed that the overall situation and trend of the temperature under the actual condition can be reflected by control simulation module.The proposed design method and control strategy for differentiated temperature control system have certain feasibility and rationality,as well as higher engineering application values.