Faults Detection Using Sliding Mode Observer and Its Application on Elevating Servo Systems

Table 2

Common faults implementation scheme.

Serial no.	Faults type	Faults implementation	Parameter setting
1	System pressure fault	Regulating pressure by a proportional relief valve	−1.0 MPa
2	Internal leakage	Adding an adjustable throttle valve between cylinder ports	Throttle diameter 3.5 mm
3	Proportional fault	Reducing proportional valve amplifier gain	95%
4	Angular sensor fault	Reducing sensor gain	95%