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影响热电制冷器仿真温度的输入参数较多且不易准确测得导致建立高精度仿真模型较为困难。为此,提出了一种热电制冷器热模型建立与修正方法。首先建立热电制冷器温度场仿真模型,并基于Spearman相关级数对影响仿真温度的参数进行灵敏度辨识,确定强相关参数和弱相关参数;然后以热电制冷器的实测温度值为目标,采用多岛群遗传算法对强相关参数进行修正;在此基础上,再对弱相关参数进行修正;最后运用霍克基维斯直接搜索算法对修正后的参数进行更为精确的修正,得出了电流为3.6 A时模型输入参数的修正值。采用相同方法获得了电流在0~3.9 A范围内输入参数的修正值。据此建立的热模型,仿真值与实测值最大误差小于4.9℃(-5~100.5℃范围内),表明该热模型的建立与修正方法合理有效。
The input parameters that affect the simulation temperature of the thermoelectric cooler are more difficult to measure accurately, which leads to the difficulty of establishing a high-precision simulation model. To this end, a thermoelectric cooler thermal model establishment and correction method is proposed. Firstly, the temperature field simulation model of the thermoelectric cooler is established. Based on the Spearman correlation series, the sensitivity of the parameters affecting the simulation temperature is identified to determine the strong correlation parameters and the weak correlation parameters. Then, the measured temperature of the thermoelectric cooler is used as the target. Based on this, the weak correlation parameters are corrected. Finally, the modified parameters are corrected more accurately by using the Hopkseisis direct search algorithm, and the current is 3.6 A model input parameters of the correction value. In the same way, the correction value of the input parameters in the range of 0 ~ 3.9 A was obtained. The maximum thermal error between the simulation value and the measured value is less than 4.9 ℃ (-5 ~ 100.5 ℃), which shows that the method of establishing and correcting the thermal model is reasonable and effective.