Comparison between Conventional and Azimuthing Podded Propulsion on Maneuvering of a Ferry utilizing Matlab Simulink Program

Abstract

The aim of the paper is to describe the influences of conventional and azimuthing podded propulsion on passenger ferry maneuvering, particularly turning circle and zig-zag maneuvers. The MATLAB-simulink program was used to simulate the turning circle and the zig-zag maneuvers. The program was developed based on the mathematical model for ferry maneuvering. The model involved the setting-up of a 4-DOF in a modular of the Mathematical Modelling Group (MMG) of the hull, propellers-rudder or pod system. The simulation includes separating components of the hull equations, propeller-rudder or pod systems as well as the interaction between them. The results indicated that the azimuthing podded propulsion has an advantage for turning circle performance, meanwhile conventional propulsion is beneficial for zig-zag maneuvers. The 1 st and 2 nd overshoot times of conventional propulsion of the sea trial are higher than the simulation; but the turning cirles of the sea trial are lower.

Calculation of Load Diagrams and Static Characteristics of Multimotor Electric Drive Systems using the Methods of Equivalent Forces and Reduced Moments

“…To develop and implement a computer model of the AM-75 multimotor electric drive system in the MatLab software package, we use the Simulink application (Muhammad et al, 2015) -namely, the SimPowerSystems block library subdirectory. The models of electromechanical systems created in MatLab are described in detail in Egorov et al (2020) and Sinha et al (2018).…”

Twin-Rudder-System Configurations’ Impact on Ferry Ships’ Course-Keeping Ability under Windy Conditions

“…A ship's swept path can be obtained by doubleintegrating the ship motion mathematical model's acceleration, including hydrodynamic derivatives. A numerical integration of the Dormand-Prince method (Maimun et al, 2013;Muhammad et al, 2015) then solved the equations of motion in this time-domain simulation using the MATLAB-Simulink program. The coefficient of hydrodynamic derivatives for the acting hull force and moment in Equation 2-and the interaction force coefficient among the hull, propeller, and rudder-were predicted using the derived regression equation developed by Yoshimura and Masumoto (2012).…”

Pengaruh Sudut Kemiringan dan Jarak antar Daun Kemudi Terhadap Kinerja Maneuvering KMP Bontoharu

“…Hasil penelitian terdahulu menyebutkan sejumlah pengaruh yang berpotensi terhadap pengurangan tingkat kemampuan maneuvering kapal ferry ro-ro antara lain adalah kapal dengan sarat (T) yang relatif rendah [3], faktor lingkungan pelayaran seperti halnya tingkat kedalaman perairan [4], kecepatan angin dan tinggi gelombang [5 dan 6] serta bangunan atas yang relatif besar [7]. Penomena diatas secara signifikan dapat mengubah kecepatan dan arah gerak kapal sebagai akibat reaksi gaya dan momen yang ditimbulkan saat kapal bermanuver, kondisi ini dapat lebih diperburuk dengan meningkatnya kemiringan kapal, namun dengan kecepatan operasi kapal yang rendah serta perbandingan B/T yang relatif besar hal ini dapat mengurangi kemiringan kapal ferry ro-ro (atau ≤10 deg) sebagaimana penelitian Muhammad et al [8].…”

“…Selanjutnya untuk sudut kemiringan daun kemudi ±35 0 (atau sudut kemiringan maksimum sebagaimana yang disyarankan IMO), pada sudut ini kemampuan maneuver KMP Bontoharu lebih baik dibandingkan pada sudur kemiringan daun kemudi ±35 0 dengan pengurangan diameter taktical (DT) masing-masing sebesar 9,1% (2,80L) dan 8.9% (3,48L) serta advance diameter (AD) kanan dan kiri sebesar 5,2% (2,66L) dan 5,1% (2,68L). Meningkatnya kemampuan ini sangat dipenggaruhi reaksi gaya normal daun kemudi (FX), namun dengan nilai tactical dan advance diameter yang relatif kecil hal ini sangat berpotensi membahayakan kapal dengan meningkatkan sudut kemiringan (heeling) kapal saat maneuver [8].…”