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Journal : IPTEK Journal of Proceedings Series

Stability Control Design of Sigma Class Ship Firing Mode using Fuzzy Gain Scheduling-PID Munadhif, Ii; Aisjah, Aulia Siti; Masroeri, A A
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2015i1.1153

Abstract

Sigma class ship of Hasanuddin 366 is one of Indonesian battle ship. When the ship operates, shipwreck can be happened because impact force disturbance can increase the angle of yaw and roll. In this research, the system of rudder roll stabilization is designed to keep the ship heading/yaw and decrease the roll angle using ship nonlinear dynamic model of 4 degree of freedom (DOF) that contains surge, sway, yaw, and roll.  Fuzzy gain scheduling–PID (FGS-PID) controller is used to control rudder angle as the steering control. The value of the cannon impact force disturbance is 1062.525 Newton with angle variation of 30o from the direction of ship surge. The FGS-PID controller is compared with the PID Ziegler Nichols (PID-ZN) controller as reliability test. According to simulation result, the FGS-PID controller is better than PID-ZN in keeping the heading and decreasing the roll. The performance of FGS-PID controller with heading input of 20o and 30o is compatible with the stability parameter of IMO (International Maritime Organization).
The Design of E-Learning (share.its.ac.id) Course “Sistem Pengendalian Otomatis” to Support Effective Learning Outcomes Syamsul Arifin; Aulia Siti Aisjah; Nurlita Gamayanti; Tutug Dhanardono; Yaumar Yaumar; Yusuf Bilfaqih
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.568 KB) | DOI: 10.12962/j23546026.y2015i1.1129

Abstract

Open and integrated online learning is learning that promotes the use of learning content from colleges that have more resources for other universities in Indonesia. Subjects – “Sistem Pengendalian Otomatis” (SPO) 4 credits, one of subject in Engineering Physics Department, has been tested for blended learning with partner universities, between ITS with ITN Malang, ITT Bandung. Currently e-learning use by Sriwijaya University, UNSRAT-Menado and MUSAMUS-Merauke. Learning object designed in 8 Sub Achievement Learning - SCP, in cognitive, psychomotor and affective, in the activities: independent study, groups study in guided by lecturer, synchronous and asynchronous learning. Affective abilities measured by activity chats, forums, management capabilities to upload time of task, and the ability of communicate in writing. Psychomotor ability is measured by skill in the design of control in the mini plant or object and skill in programming. The skill have recorded by video camera and uploaded in the share.its.ac.id. Student followers of SPO course showed cognitive abilities, and 92% of them have met the achievement standards that have been set.
Analysis of Spatial Characteristic of Maritime Weather in Java Sea Rachmad Andri Atmoko; Aulia Siti Aisjah; Gunawan Nugroho
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (84.276 KB) | DOI: 10.12962/j23546026.y2015i1.1139

Abstract

Sea transportation continuity is mainly affected by the sea weather. The sea voyage may be disturbed by the unpredictable weather pattern. The rate of shipping accident that is caused by the bad weather shows a high percentage. Accordingly, the study of java sea wave characteristic is required. The java sea waters especially in the north side of Java Island, between Surabaya, Semarang Banjarmasin and Makassar is one of the most dense shipping lanes in Indonesia. Several big harbors such as tanjung perak of Surabaya and tanjung emas of Semarang serve high frequency of stevedoring and passenger loading/unloading. In previous researches, the sea weather predictor of java sea waters is still temporal. In this research, numerical modeling of SWAN is used to models the sea wave propagation direction and significant height of the wave in java sea waters. This model uses the concept of spectral energy balance to describe physical interaction that happened in the sea. Two scenarios are applicated in this simulation. in the first scenario, the input of wind speeds are given from 4 direction (west, north, east and south), while in the second scenario, the wind speeds are given according to the character of seasonal winds of the research object area.
Analysis of The Dynamic Stability Positioning Control System of Semisubmersible Aulia siti Aisjah; Eko Budi Djatmiko; Riza Aris Hikmadiyar; Nur Kholis
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.495 KB) | DOI: 10.12962/j23546026.y2015i1.1142

Abstract

The semisubmersible offshore dynamics depend on the condition of the ocean environments. Disruption of forces and moments in the floating structure caused by environment factors, there are wind, waves and ocean currents. This disturbances will cause decreased stability of the structure. This situation will disrupt the process of oil and gas exploration. Currently exploration activities is success if the structure in the static condition and remain on. This condition needs a force or torque to counter the disruption caused by the environment. This paper proposes a control system and analyze the performance of response stability of dynamic positioning system (DPS). DPS will control in 3 Degree of Freedom (DOF) variables, there are: sway, roll and yaw. The structure of the DPS consists of controllers, sensors, actuators. Actuators are Thruster System and Power System. The strategic to maintain in DPS is Linear Quadratic (LQG) control. This method is one of optimal control which capable rejected wave interference. Some values control parameters, that are Q and R in the cost function, show the robustness of DPS.