Electro-hydraulic linear actuator

摘要

The paper presents an electro-hydraulic linear actuator used at Tuzla Sea Survival School on the Cabin Emergency and Escape Trainer CEET B732 developed by author, which implements their research about electro-hydraulic system driven by common PLCs. This kind of control can be very easy to meet hydraulic process requirements, improve the system stability, reliability and automation level. Most of PLCs used on servo-hydraulic applications are dedicated DSP based. The actuator functionality was implemented as a software application using specialized PLC software tools - ladder diagram. The management of actuator moving scenarios is implemented in a database stored on PLC; for a moving scenario the successive position values, once per second, are recorded as a table in nonvolatile memory. The authors proposed solution and the experimental results validated that the approach is well fitted on fast processes like servo-hydraulics.