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为有效识别航空发动机转静碰摩部位,提出基于机匣应变信号的航空发动机转静碰摩部位识别技术。以应变片为敏感元件,采用沿机匣轴向、周向粘贴应变片两种实验方案,利用航空发动机转子试验器模拟大量不同碰摩部位的样本,采集航空发动机转子试验器机匣上的应变信号,提取应变的均值特征,利用支持向量机,识别不同碰摩位置。结果表明:沿机匣周向的应变均值特征可有效识别转静碰摩部位,且鲁棒性较好,且仅需在机匣的4个位置粘贴应变片即可对4个不同碰摩部位达到100%的识别率。沿机匣轴向的应变均值特征也可识别不同的碰摩部位,但识别效果不如沿机匣周向效果理想。
In order to effectively identify the aero-engine rubbing and rubbing site, aero-engine rubbing and rubbing site identification technology based on the magazine strain signal is proposed. Taking the strain gauge as the sensitive element, two experimental schemes of axial and circumferential strain gages along the casing were adopted. Aeroengine rotor tester was used to simulate a large number of specimens with different rubbing sites. The strain on the casing of aeroengine rotor tester was collected. Signal, extract the mean value of strain, use support vector machine to identify different rubbing position. The results show that the mean value of the strain along the perimeter of the casing can effectively identify the static rubbing sites and has good robustness. Only by applying the strain gages at the four positions of the casing, four different rubbing sites Achieve 100% recognition rate. The mean strain along the axial direction of the casing can also identify different rubbing sites, but the recognition effect is not as good as that along the casing circumferential direction.