Fuzzy Logic Positioning System of Ship’s Diesel Generators Actuating Mechanisms

Анотація

Hydraulic and electromagnetic drive are used as actuating mechanisms for fuel oil and gas injection on ships equipped with electronically controlled diesel generators. It leads to weight and size increasing, high power consumption for servo oil pump driving, reducing life time and reliability of control valves. Piezoelectric drive (stack actuators, linear and rotary motors) can be used as alternative to hydraulic and electromagnetic. It lacks the drawbacks of hydraulic and electromagnetic drives, but requires to use amplifiers to create high displacements and dynamic properties correcting devices due to high internal damping of piezo drive. Developed fuzzy logic positioning system models allow to correct the dynamic properties of the piezo drive and apply it to control the actuating mechanisms of marine diesel generators, reduce the energy consumption and expand the range of possible fuel injection curve.