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All Journal Mechatronics, Electrical Power, and Vehicular Technology Proceeding of the Electrical Engineering Computer Science and Informatics Mutawatir : Jurnal Keilmuan Tafsir Hadith
Arief Syaichu Rohman
Institut Teknologi Bandung
Religion Humanities Computer Science & IT Electrical & Electronics Engineering

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Designing optimal speed control with observer using integrated battery-electric vehicle (IBEV) model for energy efficiency Rina Ristiana; Arief Syaichu Rohman; Estiko Rijanto; Agus Purwadi; Egi Hidayat; Carmadi Machbub
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 9, No 2 (2018)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.mev.2018.v9.89-100

Abstract

This paper develops an optimal speed control using a linear quadratic integral (LQI) control standard with/without an observer in the system based on an integrated battery-electric vehicle (IBEV) model. The IBEV model includes the dynamics of the electric motor, longitudinal vehicle, inverter, and battery. The IBEV model has one state variable of indirectly measured and unobservable, but the system is detectable. The objectives of this study were: (a) to create a speed control that gets the exact solution for a system with one indirect measurement and unobservable state variable; and (b) to create a speed control that has the potential to make a more efficient energy system. A full state feedback LQI controller without an observer is used as a benchmark. Two output feedback LQI controllers are designed; including one controller uses an order-4 observer and the other uses an order-5 observer. The order-4 observer does not include the battery state of charge as an observer state whereas the order-5 observer is designed by making all the state variable as the observer state and using the battery state of charge as an additional system output. An electric passenger minibus for public transport with 1500 kg weight was used as the vehicle model. Simulations were performed when the vehicle moves in a flat surface with the increased speed from stationary to 60 km/h and moves according to standard NEDC driving profile. The simulation results showed that both the output feedback LQI controllers provided similar speed performance as compared to the full state feedback LQI controller. However, the output feedback LQI controller with the order-5 observer consumed less energy than with the order-4 observer, which is about 10% for NEDC driving profile and 12% for a flat surface. It can be concluded that the LQI controller with order-5 observer gives better energy efficiency than the LQI controller with order-4 observer
Line Detection Using Arranging Coordinate Point Method Rumaisa Ramadhani; Arief Syaichu Rohman; Yulyan Wahyu Hadi
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 6: EECSI 2019
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eecsi.v6.1975

Abstract

Line detection system is a system line that canrecognize the line mark painted on the road. This is one of thedigital driver assistance tools that improve driving safety. Thevideo streaming captured using a camera which is installed infront of the vehicle as the input system will detected the line byusing the Arranging Coordinate Point Algorithm. The systemwill provide the correction value of the vehicle distance from thecenter of the road and guide the driver to stay on the track.Based on the experiment result, the system could detect astraight and curved line. The line is well detected by the systemin good condition such as less of noise of the road, good weather,and clear lane line. The system has a computational process0.0625 fps with average error calculation of position from thecenter of the road is 0.0992 m and standard deviation is 0.62448m.
Interpretasi Global Hadis Rukyat Hilal Pranoto Hidaya Rusmin; Arief Syaichu Rohman; Dhani Herdiwijaya; Izzah Faizah Siti Rusydati Khaerani; Reza Pahlevi; Dadang Darmawan
Mutawatir : Jurnal Keilmuan Tafsir Hadith Vol. 7 No. 1 (2017): JUNI
Publisher : Jurusan Tafsir Hadis Fakultas Ushuluddin dan Filsafat UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (619.584 KB) | DOI: 10.15642/mutawatir.2017.7.1.105-139

Abstract

Before Islamic Calendar begins, Muslims were used to wait for the earliest visible crescent (hilâl), which marks the beginning of Ramadan. The determination of the beginning of Ramadan is based on the rukyat al-hilâl hadith. Because the hilâl visibility on the earth surface is not the same, it results the differences on the beginning of Ramadan fasting. In addition, the sighting hilâl method can only determine the next 29 days, it cannot reach for the next month and even for the next year. These are the main reasons for re-interpretation of the rukyat al-hilâl hadith from global perspective. From this study, it is found that the context in the Qur’an, related to the Ramadan fasting, is fasting in one full month, 29 or 30 days, according to the duration of the lunar synodic cycle. However, the condition of the people and the science at that time has not developed yet, which is the cause of calculation (h}isâb) verses in the Qur’an cannot be used. When they have developed, the calculation verses in the Qur’an can be used to determine the number of days in a calendar month. This will produce a global calendar for mankind.
Co-Authors Agus Purwadi Carmadi Machbub Dadang Darmawan Dhani Herdiwijaya Egi Hidayat Estiko Rijanto Izzah Faizah Siti Rusydati Khaerani Pranoto Hidaya Rusmin Reza Pahlevi Rina Ristiana Rumaisa Ramadhani Yulyan Wahyu Hadi