Abstract: In the designing of superplastic micro-extrusion device，this paper applied a PI Smith predictor to the temperature control system for its time-delay characteristic.Based on the rapid prototyping instruction，the model identification control strategy of temperature parameter was realized in the MATLAB/Simulink environment.The temperature control system was composed of industrial control computer and data acquisition card PCI-1710.The power out was controlled by PWM method.The result of temperature control in experiment shows that the control precision is in the range of ±0.5℃，it can satisfy the design target.

摘要： 针对研制超塑性微挤压装置中存在的温度控制对象大延迟特性，将PI Smith预估控制算法应用于该装置的温度控制系统中，在MATLAB/Smulink环境下，结合快速原型开发概念，实现对温度参数的模型辨识和实时控制。温度控制系统由工控机与PCI-1710多功能数据采集卡组成，通过PWM调功输出实现恒温控制。温度控制实验表明，控制精度在±0.5℃范围以内，可以满足超塑性微挤压装置的温度控制精度。