Dynamic Characteristic Analysis at Each Operating Condition for Electric Ship Propulsion System

2008 ◽  
Vol 32 (8) ◽  
pp. 1296-1302 ◽  
Author(s):  
Won Jeon ◽  
Yong-Peel Wang ◽  
Sang-Yong Jung
Keyword(s):  
Dynamic Characteristic ◽  
Propulsion System ◽  
Characteristic Analysis ◽  
Operating Condition ◽  
Ship Propulsion ◽  
Electric Ship

Flight Dynamic Characteristic Analysis of a Generic Airbreathing Hypersonic Vehicle

2014 ◽  
Vol 716-717 ◽  
pp. 724-729 ◽  
Author(s):  
Rui Guang Yang ◽  
Jian Qiao Yu ◽  
Yuan Chuan Shen
Keyword(s):  
Dynamic Characteristic ◽  
High Speed ◽  
Complex Dynamics ◽  
Equations Of Motion ◽  
Hypersonic Vehicle ◽  
Propulsion System ◽  
Characteristic Analysis ◽  
The Stability ◽  
Dynamics Characteristic ◽  
Poor Stability

Because of the high speed, strong coupling between aerodynamics and propulsion system, complex environmental conditions and new propulsion system, the airbreathing hypersonic vehicles have a complex dynamics characteristic. This paper use the generic hypersonic vehicle model (CSULA-GHV) to research this issue. The nonlinear longitudinal equations of motion are linearized based on the assumption of little perturbation. Analyze the dynamic characteristic on a feature point selected. The results show that, the stability of this model is poor. It has to design an efficient controller to adjust the poor stability.

Verification, Validation and Accreditation of Ship Electric Propulsion Simulation System

2013 ◽  
Vol 433-435 ◽  
pp. 1915-1920
Author(s):  
Bing Li ◽  
Li Hong Li ◽  
Fan Ming Liu
Keyword(s):  
Electric Propulsion ◽  
System Simulation ◽  
Simulation System ◽  
Propulsion System ◽  
Verification And Validation ◽  
Ship Propulsion ◽  
Validation Methods ◽  
Electric Ship ◽  
Expert Theory ◽  
Modelling Simulation

in this paper, the concepts of modelling, simulation, verification and validation are described in order to analyse their necessities in electric ship propulsion system simulation. Traditional verification and validation methods are outlined before a new method based on expert theory and verification and validation methods of software testing is proposed to verify if the simulation program meets customers needs and respective software protocols, according to the characteristics of electric ship propulsion system.

scholarly journals Comparison of COGES and Diesel-Electric Ship Propulsion Systems

2016 ◽  
Vol Special edition (1) ◽  
pp. 131-148
Author(s):  
Vedran Mrzljak ◽  
Tomislav Mrakovčić
Keyword(s):  
Diesel Engines ◽  
Gas Turbines ◽  
Electric Propulsion ◽  
Cost Effective ◽  
Propulsion System ◽  
Pollutant Emissions ◽  
Propulsion Systems ◽  
Ship Propulsion ◽  
Passenger Ships ◽  
Electric Ship

Diesel-electric ship propulsion is a frequent shipowners choice nowadays, especially on passengerships. Despite many diesel engines advantages, their primary disadvantage is emission of pollutants. As environmental standards become more stringent, the question of optimal alternative to diesel-electric propulsion arises. COGES (COmbined Gas turbine Electric and Steam) propulsion system is one of the proposals for alternative propulsion system, primarily due to significant reduction of pollutant emissions. On the other hand, gas turbines have higher specific fuel consumption in comparison with diesel engines what represents their noticeable disadvantage. However, some analyzes suggested that COGES propulsion system could be still cost-effective in comparison to diesel-electric propulsion, particularly on passenger ships where higher initial investment can be compensated by increasing the number of passenger cabins. This paper shows a comparison of above mentioned propulsion systems, which can be useful for the optimal ship propulsion system selection

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