Table 1 NEHS parameters.

From: Adaptive neural observer-based output feedback anti-actuator fault control of a nonlinear electro-hydraulic system with full state constraints

Parameter

Description

Value

βe (MPa)

Bulk modulus factor

1.25 × 103

kt (m3/s/V/Pa− 1/2)

Valve coefficient

3.2 × 10− 8

K (Ns/m)

Friction term

450

M (kg)

Inertia load mass

4.5

A(m2)

Work area

4 × 10− 4

Ps (MPa)

Supply pressure

16

P0 (MPa)

Return pressure

0.1

Vc (m3)

Fixed volume

6 × 10− 5

Cf (m5/Ns)

ILF coefficient

1.5 × 10− 8

C0 (m5/Ns)

Leakage coefficient

1.2 × 10− 11

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