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All Journal Transmisi: Jurnal Ilmiah Teknik Elektro GEMA TEKNOLOGI BERKALA FISIKA Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal ULTIMA Computing RESISTOR (Elektronika Kendali Telekomunikasi Tenaga Listrik Komputer) Jurnal Pengabdian Vokasi

Fakhruddin Mangkusasmito

Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro

Author-ID : 3813859

Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics

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SISTEM KENDALI POSISI SUDUT ANGGUK UNTUK ROKET RKX-300 DENGAN METODE KENDALI LINEAR QUADRATIC REGULATOR (LQR) DAN POLE PLACEMENT Fakhruddin Mangkusasmito; Wahyudi Wahyudi; Budi Setiyono
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 15, No 2 (2013): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Abstrak Secara umum roket merupakan sistem yang terdiri dari wahana, propulsi, propelan, aeorodinamika dan trayektori, pemanduan dan kendali, serta telemetri dan telekomando.Agar sistem roket bisa bekerja dengan baik maka setiap subsistem tersebut harus bekerja secara sinergis untuk mencapai performa yang diharapkan.Secara garis besar pergerakkan roket ditentukan oleh sirip-sirip roket.Pada umumnya sirip kendali dapat dibagi menjadi tiga jenis, yaitu sirip kendali angguk, sirip kendali geleng, dan sirip guling.Di Indonesia sendiri melaui Lembaga Penerbangan dan Antariksa Nasional (LAPAN) mencoba untuk melakukan pengembangan teknologi kedirgantaraan di Indonesia termasuk di dalamnya roket.Salah satu produknya adalah roket RKX-300 yang diharapkan menjadi sistem wahana peluncur bagi uji coba sistem muatan. penelitian ini dilakukan dengan mensimulasikan perancangan pengendalian terhadap sirip angguk atau defleksi elevator roket untuk mengatur posisi sudut angguk roket. Untuk metode pengendalian defleksi elevator, digunakan metode Linear Quadratic Regulator (LQR) dan pole placement yang diterapkan bersama-sama pada plant. Penggunaan metode LQR saja menghasilakan hasil yang tidak optimal, kemudian digunakan metode pole placement yang memperlihatkan perbaikan pada respon transien sistem terhadap masukan step, yang selanjutnya dengan metode LQR sistem dapat mencapai nilai referensi yang diinginkan. Kata Kunci : Roket RKX-300, Sirip Angguk, LQR,Pole Placement Abstract In general, rocket is a system consist of spacecraft, propulsion, propellant, aerodynamic and trajectory, scouting and control, as well as telemetry and telecommand. In order for rocket system can work well, each subsystem must work synergistically to achieve the expected performance. the system aims to control the movement of rocket, so rocket could move according target given. In general, the control fins can be divided into three types, namely pitch fin, yaw fin, and roll fin. In Indonesia alone through Lembaga Penerbangan dan Antariksa Nasional (LAPAN) tries to make development of aerospace technology including rocket. One of its prosuct is RKX-300 that expexted to lauch vehicle system for payload testing charge.The final task is accomplished by simulating the control design of pitch fin or elevator deflection to position its nod. For elevator deflection control method, used Linear Quadratic Regulator (LQR) and Pole Placement, applied together on the plant. Using LQR method alone resulting in sub-optimal results, then use pole placement method that shows the improvement in the transient response of the system to a step input, the system further with LQR method can achieve the desired reference value. Key Word : Rocket RKX-300, Pitch Fin, LQR, Pole Placement, MATLAB,

PENINGKATAN KINERJA CONTROL VALVE AKIBAT FENOMENA RESET WINDUP PADA SISTEM REBOILER Megarini Hersaputri; Yuniarto Yuniarto; Ari Bawono Putranto; Dista Yoel Tadeus; Fakhruddin Mangkusasmito
BERKALA FISIKA Vol 25, No 2 (2022): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar

One of the important elements of the LPG production process is the control valve. Control valves is almost 90% found in the LPG process. The size of the control valve must have a standard size so that the performance of the control valve is more optimal. Control valve CV1 is a control valve to regulate the flow of steam to reboiler in the distillation column. CV1 at the gas processing plant which is the object of research is experiencing the phenomenon of reset wind up, reset wind up is a phenomenon where the variable control valve process is unable to reach the set point at the indicating point (TIC) even though the control valve has reached 100% opening. The phenomenon of reset wind up on CV1 affects the temperature of the steam used for the reboiler. If the steam produced by the reboiler is not up to separation standard in propane distillation, then the C3 separation is not perfect and will affect the LPG yield. To improve the performance of the control valve, it is necessary to calculate the coefficient valve on the control valve and replace the internal valve parts. From this research, the coefficient value is 591, control valve body type ET-667 with diameter of 8 "and a travel indicator 2" is 567. This difference also occurs when the valve openings are 50%, 72%, 75% and 100%. The calculated coefficient valve value should be less than the data sheet. Internal part replacement was also carried out in this study, by replacing the cage on the control valve into a cage with a linear type.

APLIKASI MESIN ROLL BERPROFIL ALUR UNTUK PRODUK PERABOT RUMAH TANGGA Hartono Hartono; Adi Nugroho; Fakhruddin Mangkusasmito; Seno Darmanto; Mohd Ridwan; Sarwoko Sarwoko; Adi Kurniawan Yusim
Jurnal Pengabdian Vokasi Vol 2, No 2 (2021): Nopember 2021
Publisher : Sekolah Vokasi Universitas Diponegoro

Kegiatan pengabdian skim PKUM bagi Kelompok industri perabot rumah tangga dan mebel bambu dilakukan untuk meningkatkan kualitas produksi dan menajemen berbasis ekspor. Ada puluhan industri perabot rumah tangga baik skala besar, menengah dan kecil di Tegalrejo Magelang Jawa Tengah dan salah satunya tergabung di Industri Maju Mulyo. Selanjutnya puluhan industri mebel ukir bambu di Tegalrejo Magelang oleh pejabat daerah diwadahi dalam beerapa paguyuban dan salah satunya adalah kelompok Pengrajin Bambu Mas. Pengembangan kelengkapan sarana anggota industri perabot rumah tangga dan mebel ukir bambu pada usulan kegiatan diarahkan pada peningkatan kapasitas/produktitas dan kualitas produk perabot rumah tangga dan mebel bambu berukir. Dan untuk mencapai kapasitas dan kualitas produk perabot rumah tangga dan ukir bambu berbasis muatan lokal dan dengan pangsa pasar lokal dan nasional (ekspor), tim pengabdian menyusun langkah kerja atau kegiatan pengabdian meliputi pendalaman manajeman pengelolaan perusahaan terutama pada aliran bahan atau barang dan keuangan, pendalaman akan perbaikan dan penyempurnaan unit produksi, pendalaman akan perbaikan dan penyempurnaan pemasaran skala lokal dan nasional (ekspor), melengkapi showroom untuk mendukung pemasaran, pelaksanaan di industri mitra dan merumuskan indikator keberhasilan. Berdasarkan kegiatan di unit produksi, ada rancang bangun alat/mesin roll berprofil alur pada prinsipnya terdiri dari kaki atau dasar, motor listrik, meja, power transmition, hand-feed lever, ragum, klem set, landasan (blok paralel), pencekam mata bor, sarung pengurang, pasak pembuka, boring head, dan mata bor. Teknik pengerollan bertujuan untuk mempermudah, mempercepat dan menghaluskan permukaan dalam beberapa bentuk profil yakni bentuk profil yang dihasilkan berbentuk cembungan keluar maupun kedalam (tergantung pengaturan operator), menghasilkan profil permukaan yang menarik, tempat untuk menaruh penyaringan dan menambah banyaknya tingkatan perabot kukusan. Dengan adanya profil alur, produk perabot rumah tangga akan memberikan peningkatant kekuatannya, dan perabot terlihat kokoh

Design and Development of an Automated Gymnastics Movement Evaluation Device Ari Bawono; Ahmad Ridlo Hanifudin Tahier; Fakhruddin Mangkusasmito; Naurah Elfrida Anargya
ULTIMA Computing Vol 18 No 1 (2026): Ultima Computing: Jurnal Sistem Komputer
Publisher : Faculty of Engineering and Informatics, Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v18i1.4639

Rhythmic gymnastics need precision, balance, and harmonious body coordination. This study designs an automated rhythmic-gymnastics movement evaluation device based on wearable inertial and orientation sensing. An ADXL335 accelerometer sensor and an HMC5883L magnetometer sensor are integrated with an ESP32-C3 mini transmitter to acquire three-axis acceleration and heading data in real time and stream them via Wi-Fi (UDP) to a Wemos D1 Mini ESP32 as a receiver. The receiver sends data to a PC application that performs downsampling with average pooling to reduce signal density, applies min–max normalisation to harmonise scale across axes, and compares the processed test sequence against reference data. Deviations are quantified through per-parameter error computation, which is converted to accuracy and combined using predefined weights to generate an overall performance score that is displayed on an LCD/P10 panel. Experimental trials on SKJ 2012 warm-up movements show that sequences closely matching the reference pattern consistently yield high scores about 80–85, whereas intentionally incorrect executions produce substantially lower scores around 40. The proposed system therefore provides an objective, repeatable, and real-time scoring mechanism that can support teachers in evaluating movement conformity, reduce assessor bias, and enable measurable feedback for learning and training in school-based physical education.

Rancang Bangun Sistem Peringatan Pergerakan Tanah Longsor Berbasis Mikrokontroler ESP32 Dan Transmisi LoRa Galih Argya Nugraha; Fakhruddin Mangkusasmito
Gema Teknologi Vol 22, No 3 (2023): April 2023 - October 2023
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v22i3.90299

Landslides are one of the natural disasters that often occur in Indonesia, especially in highland areas and slopes with steep inclines. Landslides can cause serious impacts, such as loss of life, damage to infrastructure, and significant material losses. Indonesia, located in the equatorial region, has relatively high rainfall, which increases the potential for landslides, especially in areas that have experienced deforestation and unstable soil conditions. Therefore, a reliable early warning system that can quickly detect landslides is needed to reduce the risk of disasters. This study aims to design and build an ESP32 microcontroller-based landslide movement warning system with data communication support using LoRa technology. The system is designed using a mechanical pull switch sensor as an initial detector of ground movement. When the pull switch is pulled or disconnected, the ESP32 microcontroller will process the change in condition and immediately activate a siren and rotating light as an early warning at the location. The warning information is also sent to the receiving unit via the LoRa E220 module without relying on cellular networks or internet connections. The test results show that the system is able to respond quickly to ground movement and provide clear warnings. LoRa E220-900T22D communication can work well at an effective distance of up to ±900 meters in open areas. Based on these results, the designed system is considered simple, responsive, and suitable for implementation as an early warning system for landslides in disaster-prone areas with limited communication infrastructure.

Rancang Bangun 6-DoF Welding Arm Manipulator Robot Berbasis STM32 Alfonsus Giovanni; Fakhruddin Mangkusasmito
Gema Teknologi Vol 22, No 3 (2023): April 2023 - October 2023
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v22i3.90293

In the era of Industry 4.0, the demand for automation in the manufacturing sector continues to grow, particularly in welding processes that require high efficiency, consistency, and quality. Robotic arm manipulators have become a widely adopted solution in various countries, including Indonesia. However, the dominance of imported products poses challenges such as high investment costs and limited customization capabilities. This research aims to design and develop a six-degree-of-freedom (6-DoF) welding robotic arm manipulator using the STM32H7 microcontroller as the main control system. The STM32H7 was selected for its high processing performance, low power consumption, and flexibility in integrating sensors and actuators. The outcomes of this study are expected to contribute as an alternative solution for the development of domestic industrial robotics, thereby reducing reliance on imported technologies and supporting national technological self-sufficiency. Several tests were conducted on the developed system, including repeatability testing. The results indicate that the prototype achieved a repeatability value of ±0.225 mm, which is still lower than that of comparable industrial-grade systems (±0.02 mm). This finding suggests that while the system shows promise, further refinement is required to meet industrial performance standards

Pengendali Suhu Pada Etalase Fried Chicken Menggunakan Sensor DHT22 Dengan Metode Kontrol PID Berbasis Arduino Uno Cheyla Lokahita Pujiono; Fakhruddin Mangkusasmito
Gema Teknologi Vol 22, No 2 (2023): October 2022 - April 2023
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v22i2.90244

The temperature inside a fried chicken display case is an external factor that affects the quality of crispy fried chicken. A heating system is essential to ensure that the crispy fried chicken remains in a condition ready and suitable for consumption. This study implements an Arduino Uno-based temperature control system for a fried chicken display case using the PID (Proportional-Integral-Derivative) control method. The PID method was selected because it offers the desired response characteristics: a fast response with minimal error. An incandescent lamp serves as the actuator, while a DHT22 sensor functions as the feedback component. Testing of the PID parameters yielded values of Kp = 220, Ki = 200, and Kd = 60, with a setpoint of 50ºC. In tests conducted without external disturbances, the system achieved a settling time (ts) of 576 seconds (approximately 10 minutes). When tested in the presence of disturbances, the system demonstrated a steady-state response with a steady-state error of 0.01%, a steady-state duration of 3900 seconds (65 minutes), and a recovery time of 609 seconds (approximately 10 minutes).

Rancang Bangun Pembangkit Listrik Tenaga Bayu Menggunakan Turbin Tipe Savonius 6 Sudu Dengan Generator AC Berbasis Arduino MEGA 2560 Julio Abiyu Putra; Fakhruddin Mangkusasmito
Gema Teknologi Vol 23, No 2 (2025): October 2024 - April 2025
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v23i2.90339

The design and construction of a prototype for a Wind Power Plant (PLTB) using a three-blade Archimedes wind turbine has been completed. This turbine utilizes a DC motor that has been converted into a DC generator, with overall dimensions of 120 x 80 x 80 cm, powered by wind energy. Testing was conducted to evaluate the efficiency of converting wind energy into electrical energy based on various wind speeds and types of loads, including resistors, DC motors, and LED lamps. Test results indicate that system efficiency varies depending on wind speed and load characteristics. The highest efficiency was achieved at an optimal wind speed, ranging from 60-80%, with a power coefficient between 0.1033 and 0.1699. For a 15-watt LED lamp load, the average voltage recorded was 7.404 V, whereas, for a 5-watt DC motor load, the average voltage reached 10.132 V. The testing also revealed that the highest power value for resistor loads was obtained with a 10.5 Ω resistor, delivering 2.22 W. This study highlights the importance of optimizing turbine and generator system design to enhance energy conversion efficiency under varying wind speed conditions.

Rancang Bangun Monitoring Motor Induksi Tiga Fasa Berbasis IoT (Internet Of Things) Farah Salsabila Habib; Fakhruddin Mangkusasmito
Gema Teknologi Vol 23, No 2 (2025): October 2024 - April 2025
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v23i2.90345

Three-phase induction motors are widely used as the primary drive in the industrial sector because of their high reliability in supporting production processes. This final-year research project developed an IoT-based monitoring system for three-phase induction motors to monitor voltage, current, power, and temperature in real time via a website, using PZEM-004T (voltage, current, power) and DS18B20 (temperature) sensors. Motor condition analysis was performed using a diagnostic approach based on the National Electrical Manufacturers Association (NEMA) MG-1 14.36 standard, by calculating the percentage of unbalanced voltage, unbalanced current, and motor load percentage. Testing was conducted on two motor conditions: a loaded Direct-on-Line (DOL) motor with specifications of 2,200 watts (3 HP) and an unloaded star-connected motor with specifications of 0.5 HP. Test results for the DOL motor showed a current sensor accuracy of 98.79% (error 1.21%), a voltage sensor accuracy of 99.38% (error 0.63%), and a power sensor accuracy of 98.87% (error 1.13%), with unbalanced voltage at 1.23% and unbalanced current at 2.99%, both of which indicate that the motor is in good condition. For the star-connected motor under no-load conditions, the IoT system recorded an unbalanced voltage of 2.37% (risky condition) and an unbalanced current of 8.79% (good condition), which are consistent with manual measurements taken using a digital multimeter and a digital clamp meter (unbalanced voltage of 2.04% and unbalanced current of 9.09%).

Rancang Bangun Dc-Dc Boost Converter Dual Mode Berbasis Arduino Nano Untuk Kebutuhan Pembelajaran Naren Dramardhani Sasda; Fakhruddin Mangkusasmito
Gema Teknologi Vol 23, No 1 (2024): April 2024 - October 2024
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v23i1.90334

A comprehensive understanding of the operational characteristics of DC-DC boost converters and the fundamental differences between open-loop and closed-loop control systems are crucial learning outcomes in the power electronics curriculum. However, limited laboratory equipment often makes it difficult for students to observe physical phenomena such as voltage drop due to load regulation. This research aims to design and implement a Dual-Mode DC-DC Boost Converter learning module based on an Arduino Nano microcontroller that is compact, accurate, and integrated into a portable suitcase chassis. The power circuit is built using logic-level IRLZ44N MOSFETs, SR3150 Schottky diodes (150 V/3 A), a 330 μH toroidal inductor, and a 47 μF/160 V filter capacitor, operating at a PWM switching frequency of 62.5 kHz. The control circuit is self-powered by a 5 V DC cell phone charger via the Arduino Nano’s USB port. The system incorporates an SPDT toggle switch for instant mode switching between manual open-loop operation and automatic closed-loop PID operation (K_p = 0.2; K_i = 0.4; K_d = 0.0) to lock the target output voltage (12 V–50 V DC) from a variable power supply input (3 V–24 V DC). Experimental testing was conducted under four load conditions (no load, 220 kΩ, 22 kΩ, and 1 kΩ) with transient data recorded at 10 ms intervals, totaling 1,500 samples. The test results show that the voltage divider feedback circuit (K=101) has a high level of accuracy with an average error percentage of 0.88%. Evaluation of the transient response yielded a Mean Square Error (MSE) value of 33.82 under no-load conditions; 35.95 at a 220 kΩ load; 36.10 at a 22 kΩ load; and 46.80 at the heaviest load of 1 kΩ. The PID controller proved highly reliable in compensating for current draw up to 55.0 mA without experiencing steady-state error, making this module highly suitable for use as an interactive laboratory exercise.

Co-Authors Adi Kurniawan Yusim Adi Nugroho Ahmad Ridlo Hanifudin Tahier Alfonsus Giovanni Amatul Lutfiah Ambar Yulianti Ari Bawono Ari Bawono Putranto Ari Bawono Putranto Arkhan Subari Aulia Nurul Yunizah Budi Setiyono Cheyla Lokahita Pujiono Dista Yoel Tadeus Dista Yoel Tadeus Eko Ariyanto Eko Winarno Fahren Diaz Farah Salsabila Habib Galih Argya Nugraha Gilar Wirayudha Hartono Hartono Hasbi Nur Ashshiddiq Heru Winarno Julio Abiyu Putra Megarini Hersaputri Megarini Hersaputri Mitha Asyita Rahmawaty Mohd Ridwan Much. Azam Muhammad Sawal Baital Baital Naren Dramardhani Sasda Naurah Elfrida Anargya Nugroho, Tsani Hendro Prawira Duta Kusuma Rizal Alfa Rizki Roy Wijayanto Saiful Manan Sarwoko Sarwoko Seno Darmanto Uwaeis Bima Pangestu Wahyudi Wahyudi Yuniarto Yuniarto, Yuniarto Zaenul Muhlisin Zaenul Muhlisin

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