A Method for Aileron Actuator Fault Diagnosis Based on PCA and PGC-SVM

Table 3

Parameters of servo valve.

SV00-1: all real parameters	Unit	Value
Ports P to A flow rate at maximum valve opening	L/min	150
Ports P to A corresponding pressure drop	Bar	20
Ports P to A critical flow number (laminar turbulent)	Null	1000
Ports B to T flow rate at maximum valve opening	L/min	150
Ports B to T corresponding pressure drop	Bar	20
Ports B to T critical flow number (laminar turbulent)	Null	1000
Ports P to B flow rate at maximum valve opening	L/min	150
Ports P to B corresponding pressure drop	Bar	20
Ports P to B critical flow number (laminar turbulent)	Null	1000
Ports A to T flow rate at maximum valve opening	L/min	150
Ports A to T corresponding pressure drop	Bar	20
Ports A to T critical flow number (laminar turbulent)	Null	1000
Working density for pressure drop measurement	kg/m^3	850
Working kinematic viscosity for pressure drop measurement	cSt	60
Valve rated current	mA	1
Valve natural frequency	Hz	500
Valve damping ratio	Null	0.8
Deadband as fraction of spool travel	Null	0