Reliability Studies for Diesel-Electric Dynamic System of Unmanned Underwater Vehicles

Unmanned underwater vehicles will develop towards large displacement. And large-displacement unmanned underwater vehicles (LDUUV) usually use diesel engines for power supply. In order to solve the problem of choice between single and double diesel engines in the design process, the system reliabilities under different working conditions were analyzed and compared in this paper. The following conclusions were drawn: 1) the reliability of double diesel engine systems is 25% higher than single engine systems under the cruising speed; 2) the reliability of double diesel engine systems can be 31.2% lower than single engine systems under the highest speed; 3) when the states of the cruising speed and the highest speed take the same time in the working process, the reliability of double diesel engine systems equals the single engine systems.