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为检验霍尔推力器加速寿命试验法用于寿命预测的有效性,需对该方法在壁面形貌加工环节引入的误差的影响进行合理评估。基于此,在霍尔推力器工作80h后的壁面形貌上构造了不同类型的加工误差,利用基于惠更斯子波法的壁面形貌侵蚀演化模型计算和分析了壁面离子溅射条件对加工误差侵蚀演化特性的影响。结果表明:随着侵蚀的进行,误差会逐渐减小并向四周扩散;离子入射角度对误差的侵蚀演化影响最大,适当的入射角可以使误差被完全消除;因此,壁面形貌的加工误差对加速寿命试验方法的寿命预测效果几乎没有影响。
In order to test the effectiveness of the Hall-Thrower accelerated life test method for life prediction, the influence of this method on the errors introduced in the processing of wall topography should be properly evaluated. Based on this, different types of machining errors are constructed on the wall topography of the Hall thruster after 80 hours of operation. The wall surface erosion evolution model based on the Huygens’ wave method is used to calculate and analyze the influence of wall ion sputtering conditions on the machining Influence of Error Erosion Evolution Characteristics. The results show that as the erosion progresses, the error decreases gradually and spreads to the periphery. The ion incidence angle has the greatest influence on the evolution of error, and the error can be completely eliminated by proper incident angle. Therefore, the processing error of the wall topography Accelerated life test methods have little effect on life prediction.