大温升速率加热器的全补偿复合控制

开发了接触式电加热器，用于对高温材料同时加热和加压的性能实验，重点研究大温升速率加热工况下的温度控制问题.分析了该工况下加热器数学模型的特殊性，据此开发了基于给定值的近似全补偿顺馈-反馈复合控制方法（简称全补偿复合控制）.通过相应的实验验证了数学模型的正确性，进而对这种全补偿复合控制与经典PID方法进行了温控性能对比实验，结果表明全补偿复合控制具有更好的温度曲线跟踪性能和加热平稳性，并且能有效地抑制加热电源的死区效应.由于所推导的数学模型适用于一般加热器，因而这种全补偿复合控制方法对一般加热器的大温升速率工况具有通用性.

Full compensation combined control for heater with high heating rate

Contact-type conduction electric heater was developed for testing high-temperature material under both heat and pressure. For this heater, temperature control under high heating rate was studied. The specificity of the mathematical mode of general heaters under high heating rate was analyzed, therefore approximately full compensation feedforward-feedback combined control (FCCC) was presented. Corresponding experiments prove the deduced mathematical model. Moreover, comparative experiments of classical PID control and the FCCC were performed. The results show that the FCCC has better tracking performance for temperature curve, better stability and higher ability to restrain head-region of the heating electric power supply. The FCCC is applicable to general heaters, because the deduced mathematical model is suitable for high heating rate operation of general heaters.