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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.
The contact electric heater was developed for the experiment of simultaneous heating and pressurizing of high temperature materials, focusing on the temperature control problem under the condition of large temperature rising rate heating.It analyzed the particularity of the heater mathematical model , A composite control method based on a given value of full compensation feedback-feedback composite control (referred to as fully compensated composite control) was developed.According to the experiment, the correctness of the mathematical model was verified, and then the full compensation composite control and classic PID method is used to compare the temperature control performance.The results show that the full compensation compound control has better tracking performance and heating stability and can effectively suppress the dead zone effect of the heating power supply.Because the mathematical model is suitable for general Heaters, and therefore this full compensation composite control method for general heater large temperature rate of increase rate has versatility.