Table 5.

The diagnostic accuracy (%) of different decomposition methods on real aircraft sensor fault dataset.

Algorithm	k	SNR							Average
		−4	0	4	6	8	10	20
FFT	2	62.86	77.14	83.57	77.86	94.11	95.71	98.93	84.31
	4	67.32	59.11	78.93	81.43	94.11	88.57	99.82	81.33
	6	52.5	66.07	66.96	84.64	90.54	95.71	96.07	78.93
	8	54.11	68.04	75.54	88.75	90	93.57	94.11	80.59
STFT	2	71.79	78.75	81.07	90.89	96.43	96.07	99.82	87.83 (↑ 3.52)
	4	57.68	63.57	83.39	95.54	91.07	91.61	99.82	83.24 (↑ 1.91)
	6	55.54	63.75	80.89	87.86	88.57	91.43	99.82	81.12 (↑ 2.19)
	8	56.07	60.89	68.21	80.18	84.29	85.18	96.07	75.84 (↓ 4.75)