Research on the Field Dynamic Balance Technologies for Large Diesel Engine Crankshaft System

Table 2

The signal fitting accuracy of the initial signal and the denoised signal.

	Theoretical value	Fitting value of initial signal	Error value	Fitting value of denoised signal	Error value
The amplitude of fundamental frequency signal	3	2.6637	0.3363	3.0449	0.0449
The phase of fundamental frequency signal	30	25.6087	4.3913	28.3062	1.6938
The amplitude of second harmonic frequency signal	2	2.2977	0.2977	1.9665	0.0335
The phase of second harmonic frequency signal	45	37.8548	7.1452	47.7221	2.7221
The amplitude of third harmonic frequency signal	1.2	1.3839	0.1839	1.2967	0.0967
The phase of third harmonic frequency signal	110	125.842	15.8421	108.827	1.1732