Article Per Year (5 Year)
p-Index From 2021 - 2026
1.116
P-Index
This Author published in this journals
All Journal Media Mesin: Majalah Teknik Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Scientific Journal of Mechanical Engineering Kinematika Automotive Innovations Journal Journal of Automotive Vocational Education
Wahyu Robby Cahyadi
Universitas Billfath
Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Other

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
PENDIDIKAN JARAK JAUH DI SMK DAN KENDALANYA SELAMA PANDEMI COVID-19 Wahyu Robby Cahyadi; Sudirman Rizki Ariyanto; Bagas Surya Hadi; Muhammad Yandi Pratama
JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Vol 7, No 1 (2022)
Publisher : STKIP PGRI Tulungagung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jipi.v7i1.2712

Abstract

Pandemi Covid-19 tidak hanya menutup bisnis dan membahayakan ekonomi dunia tetapi juga menghambat proses pendidikan. Penyebaran virus Covis-19 mengakibatkan 107 negara menutup sekolah sehingga siswa diwajibkan melakukan Pembelajaran Jarak Jauh (PJJ) dari rumah. Hal ini menyebabkan ketidak efisienan kegiatan belajar terutama pembelajaran praktik di Sekolah Menengah Kejuruan (SMK) sehingga siswa tidak optimal dalam menerima materi yang diajarkan. Penelitian ini bertujuan untuk mencari tahu (1) dampak dan kendala dari Pembelajaran Jarak Jauh di SMK selama pandemi virus covid-19; dan (2) cara mengantisipasi atau mengatasi kendala tersebut. Penelitian berjenis studi kepustakaan ini menggunakan sumber data sekunder yang dikumpulkan melalui artikel ilmiah, buku, website, dan sumber-sumber lain yang relevan. Selanjutnya, data tersebut dianalisis secara kualitatif dengan model Miles and Huberman, yang terdiri dari pengumpulan data, reduksi data, penyajian data, dan penarikan kesimpulan. Temuan penelitian ini menunjukkan bahwa di masa pandemi ini guru SMK harus mampu meningkatkan kemampuan berpikir kritis dan kreatif mereka karena meskipun dalam masa pandemi materi pembelajaran tetap harus tersampaikan dengan baik kepada siswa. Solusi yang dapat ditawarkan adalah dengan memanfaatkan media pembelajaran yang bisa diakses oleh semua siswa dimana saja dan kapan saja. Youtube dapat memberikan siswa maupun guru kebebasan dalam berekspresi, berkolaborasi di dalam dunia kependidikan, serta dapat mendapatkan pengalaman berharga dalam meningkatkan kapabilitas mereka. Siswa maupun guru dapat membuat suatu video berbasis kependidikan lalu mengunggahnya ke kanal Youtube. Lalu mereka dapat menonton dan memberikan tanggapan atas video yang telah diunggah, dalam bentuk saran, pendapat, maupun kritik terhadap materi yang diberikan.
NOISE EFFECTS USING TRANSITION METAL CATALYTIC CONVERTER CHROME-COATED COPPER ON FOUR STROKE MOTORCYCLES Sudirman Rizki Ariyanto; Wahyu Robby Cahyadi; Bagas Surya Hadi; Warju Warju; Muhammad Yandi Pratama
Media Mesin: Majalah Teknik Mesin Vol 23, No 2 (2022)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v23i2.18085

Abstract

Over the past few years, the Transition Metal Catalytic Converter (TMCC) has become a standard of the exhaust system of internal combustion engines. Besides being used to reduce exhaust emissions, TMCC also has a certain effect on the noise produced. In this study, the effect of noise in the use of TMCC chrome plated copper (CuCr) was investigated. The noise test was carried out in two conditions with the same vehicle, by using a 2005 Honda Supra Fit with standard exhaust conditions and using TMCC CuCr. Noise testing was carried out based on the ISO/FDIS 5130 standard, and then the results were compared with the noise standard regulated in Permen LH No. 7 of 2009. The findings show that the use of TMCC CuCr is less efficient in reducing the vehicle noise. This is proven from the comparison results which show that on average the TMCC CuCr exhaust tends to be 10% louder than the standard exhaust. The noise test results show that the measured noise at RPM 5000 is 82.2 dBA for standard exhaust and 95.4 dBA for TMCC CuCr exhaust, while the noise standard stipulated in Ministerial Regulation No. 7 of 2009 is only 90 dBA. Through these results, it can be concluded that the use of TMCC CuCr exhaust does not accordance with the government standards and included in "Not Passed Noise Test" category.
Efektivitas Penggunaan Jet Ranger Pada Intake Manifold Terhadap Performa Honda Vario 150 cc Wahyu Robby Cahyadi; Sudirman Rizki Ariyanto; Anggara Sukma Ardiyanta; Soeryanto Soeryanto; Ata Syifa’ Nugraha; Muhammad Yandi Pratama
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 8 No 2 (2022)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2022.v08.i02.p08

Abstract

Performa kendaraan bermotor dapat dilihat dari torsi dan daya. Baik tidaknya kualitas pembakaran akan mempengaruhi performa (torsi dan daya) sepeda motor, baiknya kualitas pembakaran sejalan dengan performa. Proses pembakaran di ruang bakar dipengaruhi oleh beberapa faktor seperti temperatur, densitas, turbulensi udara, serta komposisi udara dan bahan bakar. Peningkatan turbulensi udara menjadi salah satu cara untuk meningkatkan performa mesin, dimana teknologi yang digunakan umumnya dikenal dengan sebutan jet ranger. Fungsi jet ranger adalah mengubah aliran angin yang semula linier menjadi vortex/spin/memusar. Penelitian ini berjenis eksperimen, dimana Honda Vario 150 cc menjadi objek penelitian. Metode pengujian torsi dan daya dilakukan berdasarkan standar Society of Automotive Engineering( SAE J1349). Temuan penelitian menunjukan bahwa jet ranger terbukti efektif meningkatkan performa (torsi dan daya) sepeda motor Honda Vario 150 cc. Setelah menggunakan jet ranger torsi meningkat disetiap putaran mesin dengan rata-rata peningkatan sebesar 15%. Peningkatan torsi terbesar pada putaran 3000 RPM yakni sebesar 30%, sedangkan peningkatan terendah terjadi pada putaran 9000 rpm yakni sebesar 2%. Berbanding lurus dengan torsi, daya juga mengalami peningkatan disetiap putaran mesin dengan rata-rata peningkatan sebesar 14%. Peningkatan daya terbesar terjadi pada putaran awal atau 1000 rpm yakni sebesar 66%, sedangkan peningkatan terendah terjadi pada putaran 9000 rpm yakni sebesar 3%. The performance of a motorized vehicle can be seen from the torque and power produced by the vehicle. Whether or not the combustion quality is good will affect the performance (torque and power) produced by the motorcycle, the better the combustion quality, the performance will be consistent with this. The combustion process in the combustion chamber is influenced by several important factors such as temperature, density, air turbulence, and the composition of air and fuel. Increasing air turbulence is one of the easiest ways to improve engine performance, where the technology used is generally known as a jet ranger. The function of the jet ranger is to change the originally linear wind flow to vortex/spin/swirl. This research is an experimental type, where Honda Vario 150 cc is used as the object of research. Torque and power testing methods are carried out according to the SAE J1349 standard. The findings of this study indicate that the use of a jet ranger has proven to be effective in increasing the performance (torque and power) of Honda Vario 150 cc motorcycles. After using the jet ranger, the torque increases at each engine speed with an average increase of 15%. The largest increase in torque occurs at 3000 RPM rotation, which is 30%, while the lowest increase occurs at 9000 RPM rotation, which is 2%. Directly proportional to torque, power also increases at every engine speed with an average increase of 14%. The largest increase in power occurred in the initial rotation or 1000 RPM, which was 66%, while the lowest increase occurred in the 9000 RPM rotation, which was 3%.
PENGARUH VARIASI MERK BAHAN BAKAR, JENIS BUSI, DAN TEKANAN BAN TERHADAP PERFORMA MESIN SEPEDA MOTOR EMPAT LANGKAH Wahyu Robby Cahyadi; Sudirman Rizki Ariyanto; Ata Syifa’ Nugraha; Rico Andhika Putra
Scientific Journal of Mechanical Engineering Kinematika Vol 9 No 1 (2024): SJME Kinematika Juni 2024
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v9i1.268

Abstract

This study aims to analyze the effect of variations in fuel brands, spark plug types, and tire pressure on four-stroke motorcycle engine performance. The independent variables tested include three variations of fuel brands (Pertamax, Shell Power, and AKR 92), spark plug types (standard, iridium, and platinum), and tire pressure (28 psi, 33 psi, and 38 psi). The experimental method was conducted on a Honda MegaPro PGM-FI motorcycle by measuring torque and power at various RPM using a chassis dynamometer test equipment. The results show that the sample 2 with combination of Shell-Super fuel brand, platinum spark plugs, and 33 psi tire pressure has a significant positive impact on engine performance, with higher torque and power as well as more consistent variations than other combinations. This research has important implications for motorcycle users, enabling them to optimize vehicle performance by choosing the right fuel, keeping spark plugs in good condition, and maintaining optimal tire pressure.
PENGARUH VARIASI DIMENSI CATALYTIC CONVERTER BERBAHAN TEMBAGA NIKEL TERHADAP REDUKSI EMISI GAS BUANG SEPEDA MOTOR HONDA ASTREA Ata Syifa' Nugraha; Ahmad Mahbub Zunaidi; Sudirman Rizki Ariyanto; Wahyu Robby Cahyadi
Journal of Automotive Vocational Education (JAVED) Vol 1, No 2 (2024)
Publisher : Journal of Automotive Vocational Education (JAVED)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/javed.v1i2.7132

Abstract

This study was conducted to determine the effect of adding a copper nickel catalytic converter on CO and HC exhaust emissions on a Honda Astrea motorcycle. The scope of this study includes an analysis of the effect of variations in the dimensions of a copper nickel catalytic converter to reduce CO and HC exhaust emissions. This study uses an experimental method to compare the levels of CO and HC emissions in standard exhausts without catalysts with exhausts using catalysts from two experiments with different dimensions. Data were taken at several engine speeds (1000 rpm to 6000 rpm) using a Gas analyzer. The results showed that the catalytic converter of experiment 2 was able to reduce exhaust emissions significantly. The results of experiment 2, with a catalyst length of 10cm, were able to reduce CO emissions by an average of 37% and HC by 47%. The highest reduction in CO occurred at 6000 RPM (85%), while the largest reduction in HC occurred at 1000 RPM (81%). The conclusion of this study is that the copper-nickel catalytic converter from experiment 2 is more effective in reducing CO and HC exhaust emissions compared to the catalyst from experiment 1 or standard exhaust without a catalyst.
Analisis Cacat Retak berdasarkan Umur Operasional Underwater Craft: Tinjauan Pustaka Ata Syifa’ Nugraha Nugraha; Wahyu Robby Cahyadi Cahyadi; Muayat Khoirun Nafis Nafis
Automotive Innovations Journal Vol. 1 No. 1 (2025)
Publisher : Department of Automotive Engineering Technolgy

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

Abstract

Presurre hull adalah struktur penahan beban utama di underwater craft atau kapal selam angkatan laut. Komponen struktural dasar adalah baja tarik tinggi dibawah beban tekanan hidrostatik. Makalah ini menganalisis cacat retak berdasarkan umur operasi kapal selam. Pada periode pertama dan kedua faktor pemicu retakan adalah desain, fabrikasi, pengerjaan, dan buruknya proses pengelasan. Tiga faktor lain yang pada periode ini adalah, material, dan kecelakaan. Terpapar terlalu lama terhadap iklim yang dingin dengan disertai faktor-faktor lain juga berpotensi menimbulkan retakan pada lambung kapal. Kemudian, pada periode ketiga retakan muncul akibat dari kelelahan struktur kapal dan korosi. Terjadinya retakan akibat korosi umumnya disebabkan oleh penurunan ketebalan struktur badan kapal selam yang mengakibatkan meningkatnya tegangan pada bagian kritis.
Co-Authors Ahmad Mahbub Zunaidi Anggara Sukma Ardiyanta Ariyanto, Sudirman Rizki Ata Syifa' Nugraha Ata Syifa’ Nugraha Ata Syifa’ Nugraha Ata Syifa’ Nugraha Nugraha Bagas Surya Hadi Bagas Surya Hadi Muayat Khoirun Nafis Nafis Muhammad Yandi Pratama Muhammad Yandi Pratama Muhammad Yandi Pratama Putra, Rico Andhika Soeryanto Soeryanto WARJU