We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Use of Genetic Programming for the Estimation of CODLAG Propulsion System Parameters.
- Authors
Anđelić, Nikola; Baressi Šegota, Sandi; Lorencin, Ivan; Poljak, Igor; Mrzljak, Vedran; Car, Zlatan
- Abstract
In this paper, the publicly available dataset for the Combined Diesel-Electric and Gas (CODLAG) propulsion system was used to obtain symbolic expressions for estimation of fuel flow, ship speed, starboard propeller torque, port propeller torque, and total propeller torque using genetic programming (GP) algorithm. The dataset consists of 11,934 samples that were divided into training and testing portions in an 80:20 ratio. The training portion of the dataset which consisted of 9548 samples was used to train the GP algorithm to obtain symbolic expressions for estimation of fuel flow, ship speed, starboard propeller, port propeller, and total propeller torque, respectively. After the symbolic expressions were obtained the testing portion of the dataset which consisted of 2386 samples was used to measure estimation performance in terms of coefficient of correlation ( R 2 ) and Mean Absolute Error ( M A E ) metric, respectively. Based on the estimation performance in each case three best symbolic expressions were selected with and without decay state coefficients. From the conducted investigation, the highest R 2 and lowest M A E values were achieved with symbolic expressions for the estimation of fuel flow, ship speed, starboard propeller torque, port propeller torque, and total propeller torque without decay state coefficients while symbolic expressions with decay state coefficients have slightly lower estimation performance.
- Subjects
GENETIC programming; PROPULSION systems; PROPELLERS; ALGORITHMS; TORQUE
- Publication
Journal of Marine Science & Engineering, 2021, Vol 9, Issue 6, p612
- ISSN
2077-1312
- Publication type
Article
- DOI
10.3390/jmse9060612