Assessment of Governor Control Parameter Settings of a Submarine Diesel Engine
DEFENSE SCIENCE AND TECHNOLOGY ORGANIZATION VICTORIA (AUSTRALIA) MARITIME PLATFORMS DIV
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Modern conventional submarines use diesel generators to provide power for propulsion and the hotel load. The governor, often a proportional-integral controller, attempts to maintain a constant speed by regulating the fuel flow to compensate for the back pressure disturbances due to the underwater exhaust. Poor control can cause fluctuating exhaust gas temperatures, leading to increased wear and reduced reliability. This paper develops a low order engine model which is then used to investigate the performance benefits that can be obtained through proper tuning of the governor control parameters. It is found that the engine exhibits stable behaviour over a very wide range of controller gains, and that tuning the governor solely to minimise the engine speed fluctuations may not minimise the exhaust gas temperature fluctuations.
- Submarine Engineering
- Reciprocating and Rotating Engines