==> Our company’s motto is the “innovation for renovation”
==> OMEGA Controller’s Transmitters & Feedbacks included in the Closed-Loop control & safety system through the RCS-ZMZ-002576-79 have been retrofitted, here in the ASD Tugboat’s renovation project:
Definitely, control system’s feedbacks are determinative to establish a closed loop control to improve the safety & control features over the Omega-Controller “Sub-Routine” of the software.
An obsolete ASD (Azimuth-Stern-Drive) push-tug has been targeted to be upgraded & renovated through the closed-loop-control over the azimuth systems as long as the open-loop-control over the shaft RPM to improve the maneuverability of the maritime vessel and upgrade her 180 degrees limited rotation over both thrusters to the full 360 degree.
Through the Remote-Control-System we’ve established 2 independent closed-loop-monitoring over the feedbacks, comprising an imperative MFB embedded in the hydraulic system’s Servo-Controller to establish relevant control over the hydraulic pump’s pitch-angle , & second one an electromechanical feedback located on the azimuth thruster’s slewing-ring to monitor the azimuth-angle and simultaneously we’ve established two internal closed loop control schemes to prevent overshooting through the azimuth angle & provide an smooth (and at the same time precise) movement over the azimuth hydraulic system.
=>Moreover, an open-loop control to perform the speed control over the shaft has been established, which is receiving the control command through the PLC & by means of the E/P converters are controlling the fuel-rod command angle (electropneumatic control system) located over the engine governor.
The above mentioned control is formed through an open loop & the PLC is continuously monitoring the engine shaft speed through the marine-SSU ‘s (marine safety system) speed-encoder , located on the crankshaft end.
=> As a matter of fact, the speed control over the engine is consisting of one open loop (PLC command to the governor) & 2 independent closed loop controls: the first closed loop control is taking the relevant feedback internally from the engine shaft (speed) & perform a push-pull over the fuel-rack ; the second closed-loop control is continuously monitoring the scavenge pressure over the engines & calculating amount of load over the shaft (through the intelligent marine-strategies embedded in the PLC) & providing safety & control curves to monitor the engine’s load.
=>Simultaneously, another closed-loop control is monitoring amount of load over the clutch & performs smooth clutch engagement through the marine gearbox.