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Wawan Hermawan
Departemen Teknik Mesin Dan Biosistem, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Kampus IPB Darmaga, PO Box 220, Bogor, Jawa Barat
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Physics

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Design and Performance of an Automatic Laying Hen Feeding Machines in Cage-Type Cage Hermawan, Wawan; Yanuar, Rico Kahfi
Jurnal Keteknikan Pertanian Vol. 11 No. 3 (2023): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.011.3.358-374

Abstract

Dalam peternakan ayam petelur, pemberian pakan dalam jumlah yang tepat dan seragam merupakan hal penting dalam menjaga produktivitas telur. Tujuan dari penelitian ini yaitu untuk mendesain, membuat dan menguji kinerja mesin pemberi pakan ayam petelur pada kandang tipe cage dengan sistem penakar keluaran pakan dan mendapat data kinerja dari prototipe mesin tersebut. Mesin didesain dengan konsep penjatahan pakan otomatis dari hopper pakan yang digerakkan dengan kecepatan terkontrol, sehingga pakan dapat diberikan pada tempat pakan di setiap kandang secara seragam sesuai kebutuhan. Mesin dilengkapi empat hopper pakan yang melayani empat lajur kandang. Mesin bergerak pada rel sepanjang kandang dengan penggerak motor listrik AC. Penjatahan pakan oleh metering device tipe rotor yang diputar oleh motor DC yang dikontrol otomatis. Sebuah prototipe mesin telah berhasil dibuat dan diuji coba. Hasil pengujian menunjukkan bahwa mesin dapat memberikan pakan secara seragam pada jumlah sesuai yang diatur, secara otomatis. Mesin melaju dengan kecepatan rata-rata 0.27 m/s dan slip roda pada rel rata-rata 10.46%. Rata-rata bobot keluaran pakan 129.13 g/30 cm pada target sebaran pakan sebesar 120 g/30 cm.
Optimization of used engine oil Furnace Design with Initial Heater Muhammad Sahbudin; Wawan Hermawan; Agus Sutejo
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1237-1248

Abstract

Used engine oil is a waste from various types of machinery that has potential as an alternative fuel. The viscous characteristics of used engine oil require viscosity adjustment to be utilized as fuel. Nowadays used engine oil burners are generally using an external heater as an initial preheater, which causes the thermal efficiency decreased. The aims of this study are optimizing the design of the used engine oil burner by adding an initial heater and to find the optimum operating conditions of the burner to improve thermal. The initial heater is a spiral-shaped heat exchanger around the flame inside the burner, using its heat to decrease the viscous of used engine oil, so the used engine oil can be used as burner fuel. This study is varying the combustion air flowrate at 3.2×10-3 kg/s, 4.6×10-3 kg/s, and 6.4×10-3 kg/s and fuel rates of 2.1×10-4 kg/s, 3.1×10-4 kg/s, and 4.3×10-4 kg/s so the best performance of the burner will be observed. The results were obtained the best burner performance air flowrate of 4.6×10-3 kg/s and fuel flow rate of 4.3×10-4 kg/s, producing flue gas heat of 544°C, useful energy of 2.69 kW, and a resulting thermal efficiency of 59.54%. Keywords: Burner, Design optimization, Initial heater, Used engine oil, Viscosity.
Design and Construction of a Pesticide Spraying Machine for Chili Plants on Ridge fields Wisnaningsih, Wisnaningsih; Maulana, Muhammad Iqbal; Hermawan, Wawan
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 13 No 1 (2025): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jrpb.v13i1.1144

Abstract

Pest and disease attacks on chili plants are typically handled by pesticide spraying using backpack sprayers, which pose health risks to operators due to pesticide exposure and the weight of the equipment. The proposed solution is the development of a remote-controlled pesticide sprayer designed for ridged fields. This machine is equipped with a frame, track-type wheels, a drive motor, a water tank, a water pump, and navigation using a First Person View (FPV) camera. The machine is controlled via a remote control with a range of up to 200 meters. Performance testing shows that the machine moves at an average speed of 0.30 m/s, with an average track wheel slip value of 8.32% and a maximum slip of 10.65% when carrying a full water tank. The machine is equipped with 4 nozzles positioned as needed, with an average flow rate of 0.87 L/minute. The average current required for the driver motor is 9.1 A, while the current for the pump remains stable at 2.14 A. The control system consists of a cytron motor driver for the drive motor and a relay for controlling the on/off function of the water pump.  
Optimization of Suction Channel System on Vacuum-Type Soybean Seed Metering System Powered by Hand Tractor Adhiasta Faris Setiabudi; Wawan Hermawan; Radite Praeko Agus Setiawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.391-403

Abstract

A vacuum-type soybean seeder powered by hand tractor for Indonesia’s local soybean has been developed to overcome soybean low productivity. The developed machine still has a weakness in the context of the suction channel system. This research was conducted to optimize the suction channel system efficiency, suction performance for bigger type of seed variety, and suction effect uniformity on all metering device. The research step consisted of seed characteristic measurement for two Indonesia’s common local soybean seed variety (Anjasmoro and Grobogan), suction channel system modification and analysis, and validation based on computational fluid dynamic (CFD). The result in this research are proposed 3-types of optimized model with final selection of 1-type of model, namely Branch model. The values produced by the optimized model compared to existing model respectively 3.393 kPa (CV 0.10%) and 3.112 kPa (CV 1.54%) for negative pressure, 14.39 m/s (CV 4.11%) and 9.08 m/s (3.44%) for suction velocity, as well as 117.342 Pa and 118.147 Pa for total pressure-loss. The required value for Anjasmoro and Grobogan seed variety respectively 3.094 kPa and 3.358 kPa for negative pressure pressure, as well as 10.22 m/s and 10.03 m/s for suction velocity. Hence, the selected optimized model is more efficient, uniform, and can accommodate required negative pressure pressure and suction velocity for both Anjasmoro and Grobogan, while the existing model can only accommodate Anjasmoro. Keywords: CFD, Metering device, Optimization, Pneumatic, Soybean.
Characteristics of Mechanical Strength and Flexibility of Shallots Leaf Panjaitan, Lidia Kristina; Hermawan, Wawan; Supriyanto, Supriyanto; Triharjanto, Robertus Heru; Bahri, Sayr
Jurnal Keteknikan Pertanian Vol. 12 No. 1 (2024): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.012.1.21-34

Abstract

When operating drone sprayer, such as to distribute pesticides, downwash is the major cause of damage on the plants. Therefore, understanding the mechanical properties of plants are important to be able select the proper drone to use. In this research, characteristics of leaf strength and flexibility of two types of shallots were investigated, namely the Batu Ijo and Birma varieties. Research on the characteristics of the strength and flexibility of shallots was carried out from the 3rd to the 8th week for the Batu Ijo and 9 varieties of Birma, 100 samples each week. The strength of the leaf was measured by pulling the leaf until it breaks by attaching a thread to the base of the leaf which is pulled by a force gauge device. Then to measure its flexibility by pulling the top of the leaf with the thread that is pulled until it touches the ground surface. From this research, data on the strength characteristics of the leaves of the Birma variety 29 N that is much stronger than the Batu Ijo variety 8.9 N got obtained. Meanwhile, for the flexural characteristics, the Batu Ijo variety was 5 N with pressure P 0,113 N/cm2 more flexible than the Birma variety 3.3 N with pressure P 0,087 N/cm2. The minimum bending strength of the leaves for the two varieties F is almost the same, where for the Batu Ijo variety F 0.044 N with P 0.005 N/cm2 and for Birma varety F 0.041 N with pressure P 0.009 N/cm2. Based on the characteristics of this minimum bending, it becomes the basis for optimizing the design of the drone sprayer blade.
Optimization of Suction Channel System on Vacuum-Type Soybean Seed Metering System Powered by Hand Tractor Adhiasta Faris Setiabudi; Wawan Hermawan; Radite Praeko Agus Setiawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.391-403

Abstract

A vacuum-type soybean seeder powered by hand tractor for Indonesia’s local soybean has been developed to overcome soybean low productivity. The developed machine still has a weakness in the context of the suction channel system. This research was conducted to optimize the suction channel system efficiency, suction performance for bigger type of seed variety, and suction effect uniformity on all metering device. The research step consisted of seed characteristic measurement for two Indonesia’s common local soybean seed variety (Anjasmoro and Grobogan), suction channel system modification and analysis, and validation based on computational fluid dynamic (CFD). The result in this research are proposed 3-types of optimized model with final selection of 1-type of model, namely Branch model. The values produced by the optimized model compared to existing model respectively 3.393 kPa (CV 0.10%) and 3.112 kPa (CV 1.54%) for negative pressure, 14.39 m/s (CV 4.11%) and 9.08 m/s (3.44%) for suction velocity, as well as 117.342 Pa and 118.147 Pa for total pressure-loss. The required value for Anjasmoro and Grobogan seed variety respectively 3.094 kPa and 3.358 kPa for negative pressure pressure, as well as 10.22 m/s and 10.03 m/s for suction velocity. Hence, the selected optimized model is more efficient, uniform, and can accommodate required negative pressure pressure and suction velocity for both Anjasmoro and Grobogan, while the existing model can only accommodate Anjasmoro. Keywords: CFD, Metering device, Optimization, Pneumatic, Soybean.
Rice Farming Applicator Robot Control System Based on Radio Wave Communication Using Flysky Fs-iA6 Type Remote Control and Arduino Mega Ridwan Siskandar; Tineke Mandang; Wawan Hermawan; Irzaman Irzaman
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1948-1961

Abstract

This research focuses on designing a control system for pesticide applicator robots on rice plants. Control is carried out via radio wave communication using a transmitter-receiver (Flysky FS-iA6 2.4 GHz). The remote can control the robot wheel (forward, backward and turn), boom sprayer (raise-fall and open-close), and spray pump. The research method is carried out using the waterfall model because it is under the needs that require a sequential flow in the process. The test results show that the use of a bevel gear gearbox can increase the torque value up to 3 times. The use of 4 electric motors further increases the stability of the robot's movement (RPM and torque) when given the maximum load of the robot. The boom sprayer successfully opens-closes and fluctuates smoothly at the optimum value of PWM 50 and voltage 2.35. The time required for the boom sprayer to open-close, and rise-fall is 30 s. The relay which functions as a switch is successfully controlled, so that the pump can be activated and deactivated in mode 2 at the input. Transmitter-receiver communication test was successfully carried out. Transmitter-receiver communication is capable of up to a distance of < 150 m. Input mode 1 on the transmitter successfully controls the boom sprayer. Input mode 2 successfully controls the motion of the wheels and pump.
Traction Performance Analysis of Three Models of Traction Device for Muddy Soil Frandy Mey Syaputra; Wawan Hermawan; Radite Praeko Agus Setiawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1627-1637

Abstract

Muddy paddy fields cause the traction performance of conventional traction devices to be suboptimal. Research on the analysis of traction performance on various traction devices is needed. The objective of this research is to design, analyze traction performance, and determine the best design from three models of traction devices, i.e. 1) track type, 2) pedal type, and 3) screw type on deep muddy soil. The research method used in this study is experimental, testing the traction performance of the three models at soil bin in muddy soil conditions at 25 cm deep. The parameters measured during the traction performance test are slip, sinkage, and traction efficiency. The treatment used in this study is a vertical load ranging from 93.2 N to 222.7 N. The best traction device design was chosen using the Analytical Hierarchy Process method. The results show that the traction performance achieved the highest score in determining the best traction device design, with a score of 0.78 (track) for the minimum load, 0.83 (track) for the medium load, and 0.87 (track) for the maximum load. Therefore, the track design was ideal, scoring the highest across all parameters.
Modular System Design of Jajar Legowo Rice Transplanter Machine Athoillah Azadi; Tineke Mandang; Wawan Hermawan; Mardison Mardison
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1176-1188

Abstract

The Jajar Legowo rice transplanter has been proven to significantly improve the efficiency and effectiveness of rice planting, delivering better quality and uniformity. However, mobility on terraced land remains the primary challenge, thereby hindering the adoption of this technology by farmers. This study aimed to redesign the jajar legowo rice transplanter into a modular system to improve adaptability and ease of transport in such terrains. The research consisted of two main stages: module determination which included functional analysis, weight assessment, and component interconnection evaluation, while design analysis employed Finite Element Analysis (FEA) to assess structural strength and reliability through stress simulation. The findings indicated four main modules for the transplanter, namely: main transmission module, wheel module, feeding transmission module, and floating module. The module components have a maximum weight of 62.9 kg, which can be feasibly transported by two operators. The transmission neck interface and wheel transmission sustained operational loads of 700 N and 1000 N, respectively, with corresponding safety factors of 1.7 and 1.9. This study successfully developed a modular design for the jajar legowo rice transplanter machine that can be effectively used on terraced field. The design meets three critical adaptability indicators: (1) module weights remain within the lifting capacity of a maximum of two operators, (2) sufficient structural strength is maintained to endure operational loads, and (3) the assembly and disassembly process is achieved without the need for additional tools, minimizing the risk of component loss in the field.   Keywords: Interface, Jajar legowo, Module, Rice transplanter, Stress analysis.
Performance Evaluation of a Prototype Rotary Dryer for Granulated Palm Sugar Drying Gilang Ramdani; Agus Sutejo; Wawan Hermawan; Annastasha Diandra Putri
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 1 (2026): February 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i1.431-444

Abstract

Granulated palm sugar requires efficient drying to meet industrial quality standards and accelerate production. This study aimed to evaluate the performance of a prototype rotary dryer in reducing moisture content to a maximum target of 2.5%. Tests were conducted at rotation speeds of 23.83±0.1 RPM and 41.83±0.1 RPM with drying durations of 1, 2, and 3 h using a 500-g batch capacity. All treatments were performed in triplicates, and successfully reduced moisture below the 2.5% target, meeting SNI 01-3743-2021 and the company’s internal standards. The optimal condition, determined using the Simple Additive Weighting (SAW) method, was 23.8±0.1 RPM for 1 h, resulting in a final moisture of 2.4%, a product loss of 14.4%, and the lowest energy cost of IDR 821. Higher rotation speed increased the product loss to 55.07% due to centrifugal forces and uneven heat distribution. Sugar adhering to the cylinder walls highlighted the need for improved fin design and airflow. Future development should incorporate stable heating, expanded rotation speed (15–50 RPM) and temperature (60–80°C) variations, and automatic controls for small- to medium-scale food industry applications.
Co-Authors Abdul Azis Abdul Aziz Abdullah Adhiasta Faris Setiabudi Adhiasta Faris Setiabudi Adji P Agus Sutejo Agussabti Agussabti Agustami Sitorus Ajat Zatmika Ana Nurhasanah Anak Agung Keswari Krisnandika Andriani Lubis Annastasha Diandra Putri Annisa Nur Ichniarsyah Anugerah Fitri Amalia Arif S Aris Purwanto Armansyah Halomoan Tambunan Astu Unadi Athoillah Azadi Azmi Asyidda Mushoffa Bagus Sediadi Bandol Utomo Bahri, Sayr Desrial Diang Sagita Diang Sagita Dimas Panji Hasmoro Dionisius Dwi Wicaksono Endah Prahmawati Eny Widajati Erizal Hambali Farkhan . Feby Nopriandi Frandy Mey Syaputra Gatot Pramuhadi Gilang Ramdani Giyanto Giyanto Hanifa Farafisha Harry Imantho Herry Susanto Hideo Hasegawa I Dewa Made Subrata Irwin Syahri Cebro Irzaman, Irzaman Kudang Boro Seminar Lidia Kristina Panjaitan, Lidia Kristina M Hidayat M. Faiz Syuaib Mardison Mardison Maria TJB Masayuki Koike Maulana, Muhammad Iqbal Midian Shite Muhammad Dhafir Muhammad Idkham Muhammad Sahbudin Muhammad Taufiq Muqroob Tajalli Nelwan, Leopold Oscar Ni Putu Dian Nitamiwati Patricia Yohaneta Gendis Kusmaningjati Radite Praeko Agus Setiawan Ramayanty Bulan Ramayanty Bulan Ramayanty Bulan Ridwan Siskandar Rosyid Ridho Satyanto Krido Saptomo Setyo Pertiwi Suparlan Suparlan Sutrisno Mardjan Tamaria Panggabean Tatun Hayatun Nufus Taufik Rizaldi Teguh WW Tineke Mandang Tomohiro Takigawa Tri Nugroho Widianto Triharjanto, Robertus Heru Ubaidillah . Uning B Usman Ahmad Wisnaningsih, Wisnaningsih Yanuar, Rico Kahfi Yulianto Laksono Putra