Identification of Vibration Signal for Residual Pressure Utilization Hydraulic Unit Using MRFO-BP Neural Network

Table 1

Basic parameter table of the acceleration transducer.

Position	Measuring point	Model	Types	Direction	Unit EU	Sensitivity mV/EU	Data channel
Generator	1	INV9828	Acceleration	X	mm/s2	50.220	2
	2	INV9828	Acceleration	Y	mm/s2	49.490	1
Inlet	3	INV9828	Acceleration	X	mm/s2	48.030	4
	4	INV9828	Acceleration	Y	mm/s2	50.510	3
Middle of the spiral casing	5	INV9828	Acceleration	X	mm/s2	50.530	12
	6	INV9828	Acceleration	Y	mm/s2	49.595	11 (9)1
Tail of the spiral casing	7	INV9828	Acceleration	X	mm/s2	49.422	6
	8	INV9828	Acceleration	Y	mm/s2	50.510	5
Outlet	9	INV9828	Acceleration	X	mm/s2	46.660	7
	10	INV9828	Acceleration	Y	mm/s2	49.386	8

In the experiment of measuring point 6, channel 11 is selected for 1# unit, channel 9 is selected for 3# unit and 4# unit, and the other parameters are completely the same.