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All Journal Spektra: Jurnal Fisika dan Aplikasinya Jurnal Otomasi Kontrol dan Instrumentasi Journal of Embedded Systems, Security and Intelligent Systems
Syahwir, Irawati Dewi
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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RICE SAMPLE VAPORIATION METHOD ON METER TESTING RESISTIVE WATER CONTENT BASED ON ULTRASONIC MIST Syahwir, Irawati Dewi; Dinny, Fauzia Nur; Ihsan, Firman Khoirul
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 3 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 3, December 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.083.03

Abstract

Percentage moisture content is an important factor in assessing the quality and quantity of agricultural commodities, such as rice. The measurement of moisture content is very important to evaluate the moisture content of rice, which directly affects its quality. However, the measurement of moisture content takes a long time, so it is necessary to have an evaporation method to shorten the time so that the moisture content of the sample is as required. In this study, the method chosen was the evaporation method with ultrasonic mist. The results showed that this ultrasonic fog controller evaporation system successfully increased the moisture content of rice samples according to the criteria needed to be used in resistive-type moisture meter testing. The ultrasonic mist controller evaporation system can increase the water content of rice samples according to the criteria needed for use in resistive-type moisture meter testing, with an average increase of 0.9% within 15 minutes, 3.4% within 30 minutes, and 4.1% within 1 hour.
Penalaan Pengontrol PID untuk Kecepatan Kecepatan Motor DC pada Robot Pengangkat Anak Timbangan Syahwir, Irawati Dewi; Adoe, Cenneth Paolo Anderson Bai; Purwanto, Era; Yunanto, Prasetyo Wibowo; Wahyudi, Muhammad; Waras, Nandang Gunawan Tungga
Jurnal Otomasi Kontrol dan Instrumentasi Vol 17 No 1 (2025): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2025.17.1.6

Abstract

The rapid development of technology allows human work to be replaced by robot technology. The most frequently used robot in industry is the robot arm. The robot arm can imitate the human arm's characteristics, so it is often used to help humans lift and move goods. With this principle, the robot arm can be used as a weight-lifting robot to aid in calibrating electronic scales. This paper analyzes the control of the DC motor on a weighing-scale lifting robot arm by optimizing the overshoot with PID (Proportional - Integral - Derivative) control. The PID Control test results on the DC motor rotation are stable at 100 rpm with a steady state error of 0%. The system's response to the DC motor has a settling time of 1,26 s and an overshoot of 2%.
Penimbangan Volume Bejana Ukur Standar pada Pompa Ukur Bahan Bakar Minyak (BBM) dengan Metode Gravimetri syahwir, Irawati Dewi; Agus; Putri, Ni Made Adinda Pradnya; Nurani, Ni Ayu Miftah
Jurnal Otomasi Kontrol dan Instrumentasi Vol 14 No 2 (2022): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2022.14.2.5

Abstract

Bejana Ukur Standar (BUS) merupakan alat yang digunakan untuk mengukur volume seperti volume bahan bakar minyak di SPBU. Ketelusuran standar BUS adalah dengan metode penimbangan, sehingga kesalahan akan bertambah karena banyaknya rantai ketelusuran, sehingga pengujian dengan timbangan 3 load cell dengan metode gravimetri perlu untuk mengurangi kesalahan menggunakan BUS yang disebabkan kesalahan pembacaan, pemuaian bahan, kemiringan posisi dan faktor lainnya. Timbangan ini memberikan hasil berupa volume sehingga pengguna tidak perlu mengkonversi dari massa ke volume secara manual, Hal ini tentu saja akan mempermudah pekerjaan secara efektif dan efisien. Pengujian timbangan dengan 3 load cell ini menggunakan BUS 5 liter dengan hasil pengujian volume rata-rata terbaca sebesar 5008,26 mL, nilai standar deviasi sebesar 5,49 mL, nilai bias sebesar -8,26 mL, nilai akurasi sebesar 99,51%, nilai presisi sebesar 99,67% dan nilai kesalahan sebesar 0,49%. 
Pengangkut Muatan Kapasitas 2 kg Berbasis Mikrokontroler Syahwir, Irawati Dewi; Nainggolan , Thomas Rocky Roganda
Jurnal Otomasi Kontrol dan Instrumentasi Vol 16 No 2 (2024): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2024.16.2.1

Abstract

Energy transformation is growing, and trade is becoming more complex and dynamic regarding energy efficiency and flexible production design. The development of a semi-automatic transporter aims to improve intralogistics' flexibility whereas the electrical power requirements and time efficiency can be analyzed. The analysis method measures the rotational speed of the semi-automatic transport wheel and identifies its model. The rotation speed of the wheels on a semi-automatic transporter is based on translational movement, rotary movement, and transport and load. The measurement results show that the energy requirements for translational and rotational movements increase due to the mass of the charge. However, in the same situation, an increase in the speed value of the semi-automatic transporter results in lower energy requirements, even though the need for electrical power is increasing. The capacity of the DC motor decreases with increasing load, namely from 239.184 rpm to 166.204 rpm, and likewise for the battery from 20000 mhA to 5400 mhA. In dynamic measurement conditions, namely, measurements made while the motorbike is running, there is an average measurement error of –0.11 cm to –0,03 cm in backward movements.
Measurement of Gauge Block Surface Structure Using 12-Lamp Photometric Stereo Method Syahwir, Irawati Dewi; Setiawan, Irwan; Khairah, Inayah Dwi
Journal of Embedded Systems, Security and Intelligent Systems Vol 7 No 1 (2026): March 2026
Publisher : Program Studi Teknik Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59562/jessi.v7i1.11769

Abstract

Purpose – This study aims to develop and evaluate a non-contact method for measuring surface roughness of gauge blocks using an enhanced photometric stereo approach with multiple lighting sources, as an alternative to conventional coordinate measuring machine (CMM) methods that may damage the surface. Design/methods/approach – The research employs a photometric stereo method using 12 different lighting sources arranged at 55° intervals. The captured images are reconstructed using a photometric stereo algorithm to generate a three-dimensional surface model. Surface roughness is determined by measuring peak and valley heights and calculating their average. The objects tested are gauge blocks of class 0 and class 1, compared against standard blocks based on ISO/R 468-1966. Findings – The results show that gauge blocks of class 0 and class 1 have roughness values close to the N7 standard group, with an average roughness of 1.6 μm. The reconstruction results indicate an average error of 0.11933 μm for N7 blocks and -0.0718 μm for N8 blocks. The photometric stereo method demonstrates lower error compared to conventional contact-based measurements. Research implications/limitations – This method provides a promising non-contact alternative for surface roughness measurement and calibration. However, the study is limited to specific lighting configurations and gauge block samples, and further research is needed to validate its application across different materials and surface conditions. Originality/value – This study introduces an improved photometric stereo configuration using 12 lighting sources, enhancing reconstruction accuracy and offering a safer and more precise alternative for surface roughness measurement, particularly for calibration processes regulated by the National Standardisation Agency.
Co-Authors Adoe, Cenneth Paolo Anderson Bai AGUS Dinny, Fauzia Nur Era Purwanto Ihsan, Firman Khoirul IRWAN SETIAWAN Khairah, Inayah Dwi Muhammad Wahyudi Nainggolan , Thomas Rocky Roganda Nurani, Ni Ayu Miftah Putri, Ni Made Adinda Pradnya Waras, Nandang Gunawan Tungga Yunanto, Prasetyo Wibowo