Manoeuvring characteristics of twin-rudder systems: rudder-hull interaction effect on the manoeuvrability of twin-rudder ships

Khanfir, Sahbi; Hasegawa, Kazuhiko; Nagarajan, Vishwanath; Shouji, Kouichi; Lee, Seung Keon

doi:10.1007/s00773-011-0140-3

Cited by 35 publications

(20 citation statements)

References 6 publications

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“…Berkurangnya kemampuan ini seiring dengan pengurangan jarak antar daun kemudi yang menyebabkan berkurangnya momen yang dihasilkan daun kemudi saat kapal bermanuver Selanjutnya untuk gerak zig-zag maneuver 20 0 /20 0 sebagaimana Gambar 7, dengan melalui pengurangan jarak antar daun kemudi, hal ini mengurangi pula kemampuan heading kapal saat zig-zag maneuver yang ditandai dengan meningkatnya nilai sudut simpang sebesar 3,04% (1 st overshoot) dan 2,84% (2 nd overshoot)% sebagaimana ditampilkan pada Tabel 5. Secara umum hasil simulasi numerik (turning circle dan zig-zag maneuvering) memiliki kesamaan karakteristik dengan hasil simulasi numerik dan free running sebagaimana penelitian Khanfir et al [11].…”

Section: Hasil Dan Pembahasanunclassified

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

Muhammad

Paroka

Rahman

et al. 2019

Kapal

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Kapal ferry ro-ro sesuai fungsinya sebagai kapal penyeberangan penumpang dan kendaraan antar pulau memiliki karakteristik yang berbeda dibanding kapal niaga pada umumnya, khususnya pengunaan sistem kemudi ganda dengan rasio jarak antar daun kemudi yang relatif besar, hal ini sangat berdampak terhadap kemampuan olah gerak kapal. Penelitian ini bertujuan untuk menganalisis kemampuan maneuvering kapal ferry melalui pengaturan sudut kemiringan dan jarak antar daun kemudi. Program MATLAB-Simulink digunakan dalam simulasi turning circle dan zigzag maneuvering. Program simulasi telah dikembangkan dengan konsep time domain simulation berdasarkan persamaan model matematika pergerakan kapal pada 3-DOF (Degres of Freedom) yang meliputi persamaan komponen lambung, propeler dan daun kemudi beserta koefisien hidrodinamaka didalamnya. Hasil penelitian menujukan bahwa seiring dengan bertambahnya sudut kemiringan daun kemudi dapat meningkatkan kemampuan turning circle kapal, namun sebaliknya pada gerak zigzag maneuvering. Selanjutnya dengan bertambahnya jarak antar daun kemudi dapat meningkatkan kemampuan baik turning circle dan zigzag maneuvering, namun dengan momen daun kemudi yang relatif besar maka hal ini dapat membahayakan kapal.

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Section: Hasil Dan Pembahasanunclassified

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

Muhammad

Paroka

Rahman

et al. 2019

Kapal

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“…Actually, the propeller thrust as well as the rudder forces and moment of ship with single propeller and single rudder is different with a ship with twin propeller and twin rudder due to the interaction between propellers and between rudders during operation [13]. This interaction effect tended to decrease as the distance between propellers and the dist- ance between rudder increases [14]. These interaction effect should be investigated in advance and it should be considered in the future works.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study on Automatic Control for Collision Avoidance of Ships

Paroka

Kamil

Muhammad

2018

MST

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Automatic control system is widely applied to control the ship direction or heading angle in accordance with the decided trajectory. Several methods for improving performance of control system have been developed such as ProportionalIntegral-Derivative (PID) control and fuzzy logic based control. Within the last decade, application of automatic control system is not only for ship navigation but also for avoiding collision risk of ships in seaways. This paper discusses the application of automatic control system for avoiding ship collision by free running experiment. Fuzzy logic based control was developed using Mamdani Centroid method to estimate the necessary rudder angle in order to change the ship heading angle. Collision scenario was designed using four fixed obstacles with a certain distance which will be avoided by ship model. The results of free running experiment showed that the automatic control system can minimize the risk against collision or at least provide initial warning that may be faced by the ship. with minimum distance of 3.50 of length between perpendicular. To improve performance of control, external disturbance such as wind and wave should be considered in the design of automatic control system. AbstractStudi Eksperimental Kendali Otomatis untuk Pencegahan Tabrakan pada Kapal Laut. Sistem kendali otomatis telah banyak diaplikasikan untuk mengendalikan arah gerak atau sudut haluan kapal sesuai dengan jalur lintasan yang telah ditentukan. Beberapa metode untuk memperbaiki unjuk kerja sistem kendali otomatis telah dikembangkan seperti kendali Proportional-Integral-Derivative (PID) dan kendali berbasis logika fuzzy. Dalam satu dekade terakhir, aplikasi sistem kendali otomatis tidak terbatas hanya untuk peralatan navigasi tetapi telah dikembangkan untuk membantu dalam menghindari kemungkinan terjadinya tabrakan kapal selama pelayaran. Penelitian ini membahas tentang aplikasi sistem kendali otomatis untuk pencegahan tabrakan kapal dengan pengujian model. Sistem kendali berbasis logika fuzzy digunakan untuk mengontrol sudut kemudi sesuai dengan sudut heading atau arah gerak kapal yang diinginkan dengan menggunakan metode Mamdani Centroid. Skenario tabrakan dalam pengujian model didesain dengan menggunakan 4 penghalang yang harus dihindari oleh kapal. Hasil pengujian model menunjukkan bahwa sistem kendali dapat memperkecil resiko tabrakan kapal atau minimal dapat memberikan peringatan dini akan potensi tabrakan yang mungkin dihadapi oleh kapal. Untuk memperbaiki kinerja sistem kendali, gangguan dari luar seperti angin dan gelombang harus dipertimbangkan dalam perancangan sistem kendali otomatis kapal.

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“…Khanfir et al (2008) proposed predicting a mathematical model coefficient on ships' maneuvering when fitted with a twin-propeller, twin-rudder configuration. Furthermore, Khanfir et al (2011) conducted captive model tests and free-running tests with a singlepropeller, twin-rudder ship and a twin-propeller, twin-rudder ship. These tests aimed to evaluate drift angles' effect on rudder forces and the peculiar phenomena concerning a normal rudder force for twin-rudder ships.…”

Section: Introductionmentioning

confidence: 99%

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

Muhammad¹,

Paroka²,

Rahman³

et al. 2021

IJTech

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Ship course-keeping plays a vital role in navigation safety, especially when a ship is operating under windy conditions. A method to control ship movements through rudder-system configuration is necessary to stabilize a ship's course. This paper describes the twin-rudder-system configuration design's impact on a ship's course-keeping ability under windy conditions. A timedomain simulation using the MATLAB-Simulink program was developed for this purpose. A proportional integral derivative (PID) controller was used to adjust the ship's heading angle according to the desired path. Several parameters-such as relative wind velocity and directionswere accounted for in the simulation. The result shows that, at a wind direction of 88 o , the ship's course-keeping speed decreased; however, increasing wind velocity caused a large deviation in the ship's heading angle. Meanwhile, the ship's course-keeping speed increased with rising windspeed directions of 219 o . The ship's course-keeping time, at around 219 o under the simulation's wind direction, was 11.84% lower than during a previous sea-trial. A possible reason for this difference is that the simulation excluded waves and currents.

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Manoeuvring characteristics of twin-rudder systems: rudder-hull interaction effect on the manoeuvrability of twin-rudder ships

Cited by 35 publications

References 6 publications

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

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

Experimental Study on Automatic Control for Collision Avoidance of Ships

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

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