Claim Missing Document
Check
Articles

Found 5 Documents
Search

TURBINE BLADE REVERSE WITH CATIA SOFTWARE USING BEZIER CURVE Dewi, Dyah Kusuma
Majalah Ilmiah Pengkajian Industri Vol 12, No 1 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.498 KB) | DOI: 10.29122/mipi.v12i1.151

Abstract

Metode reverse engineering salah satunya digunakan untuk menduplikasi komponen-komponen yang akan dikembangkan dan diproduksi di dalam negeri, sehingga dapat mengurangi nilai impor dan mengurangi waktu tunggu pemesanan komponen. Komponen yang sering mengalami kerusakan adalah sudu turbin, baik pada turbin uap maupun turbin gas. Proses reverse engineering dilakukan dengan mengambil foto dari komponen tersebut menggunakan peralatan photo scanning. Hasil dari proses photo scaning tersebut berupa file dengan ekstensi .stl yang merupakan kumpulan point cloud. Selama ini banyak kesulitan yang ditemui dalam pemrosesan dari point cloud menjadi file CAD, terutama untuk komponen yang memerlukan presisi yang tinggi. CATIA merupakan perangkat lunak CAD yang digunakan untuk mengolah file .stl ini menjadi file CAD. Dalam penelitian ini metode pendekatan kurva bezier dipilih untuk teknik pemodelan dari point cloud. Dari pendekatan tersebut deviasi yang ditimbulkan dari hasil permodelan CAD dan  komponen aktual menjadi lebih kecil dan dapat ditingkatkan sesuai dengan toleransi yang diinginkan.
Analytical and Numerical Deflection Study on the Structure of 10 kW Low Speed Permanent Magnet Generator Alam, Hilman Syaeful; Irasari, Pudji; Dewi, Dyah Kusuma
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 3, No 2 (2012)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.23 KB) | DOI: 10.14203/j.mev.2012.v3.87-94

Abstract

Analytical and numerical studies of the deflection in the structure of 10 kW low speed permanent magnet generator (PMG) have been discussed in this paper. This study is intended to prevent failure of the structure when the prototype is made. Numerical analysis was performed with the finite-element method (FEM). Flux density, weight and temperature of the components are the required input parameters. Deflection observed were the movements of the two main rotor components, namely the rim and shaft, where the maximum deflection allowed at the air gap between rotor and stator should be between 10% to 20% of the air gap clearance or 0.1000 mm to 0.2000 mm. Base on the analysis, total deflection of the analytic calculation was 0.0553 mm, and numerical simulation was 0.0314 mm. Both values were in the acceptable level because it was still below the maximum allowed deflection. These results indicate that the structure of a permanent magnet generator (rim and shaft) can be used safely.
TURBINE BLADE REVERSE WITH CATIA SOFTWARE USING BEZIER CURVE Dewi, Dyah Kusuma
Majalah Ilmiah Pengkajian Industri Vol 12, No 1 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.498 KB) | DOI: 10.29122/mipi.v12i1.151

Abstract

Metode reverse engineering salah satunya digunakan untuk menduplikasi komponen-komponen yang akan dikembangkan dan diproduksi di dalam negeri, sehingga dapat mengurangi nilai impor dan mengurangi waktu tunggu pemesanan komponen. Komponen yang sering mengalami kerusakan adalah sudu turbin, baik pada turbin uap maupun turbin gas. Proses reverse engineering dilakukan dengan mengambil foto dari komponen tersebut menggunakan peralatan photo scanning. Hasil dari proses photo scaning tersebut berupa file dengan ekstensi .stl yang merupakan kumpulan point cloud. Selama ini banyak kesulitan yang ditemui dalam pemrosesan dari point cloud menjadi file CAD, terutama untuk komponen yang memerlukan presisi yang tinggi. CATIA merupakan perangkat lunak CAD yang digunakan untuk mengolah file .stl ini menjadi file CAD. Dalam penelitian ini metode pendekatan kurva bezier dipilih untuk teknik pemodelan dari point cloud. Dari pendekatan tersebut deviasi yang ditimbulkan dari hasil permodelan CAD dan  komponen aktual menjadi lebih kecil dan dapat ditingkatkan sesuai dengan toleransi yang diinginkan.
Non-linear model predictive control with single-shooting method for autonomous personal mobility vehicle Pratama, Rakha Rahmadani; Baskoro, Catur Hilman Adritya Haryo Bhakti; Setiawan, Joga Dharma; Dewi, Dyah Kusuma; Paryanto, Paryanto; Ariyanto, Mochammad; Saputra, Roni Permana
Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 15, No 2 (2024)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/j.mev.2024.1105

Abstract

The advancement of autonomous vehicle technology has markedly evolved during the last decades. Reliable vehicle control is one of the essential technologies in this domain. This study aims to develop a proposed method for controlling an autonomous personal mobility vehicle called SEATER (Single-passenger Electric Autonomous Transporter), using Non-linear Model Predictive Control (NMPC). We propose a single-shooting technique to solve the optimal control problem (OCP) via non-linear programming (NLP). The NMPC is applied to a non-holonomic vehicle with a differential drive setup. The vehicle utilizes odometry data as feedback to help guide it to its target position while complying with constraints, such as vehicle constraints and avoiding obstacles. To evaluate the method's performance, we have developed the SEATER model and testing environment in the Gazebo Simulation and implemented the NMPC via the Robot Operating System (ROS) framework. Several simulations have been done in both obstacle-free and obstacle-filled areas. Based on the simulation results, the NMPC approach effectively directed the vehicle to the desired pose while satisfying the set constraints. In addition, the results from this study have also pointed out the reliability and real-time performance of NMPC with a single-shooting method for controlling SEATER in the various tested scenarios.
A Comparative Study of Winding Angle Configurations for Improved Crashworthiness in Hybrid Al/CFRP Crash Boxes Akbar, Musthafa; Dewi, Dyah Kusuma
Automotive Experiences Vol 8 No 3 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.14280

Abstract

This study investigates the crashworthiness performance of circular hybrid aluminum/carbon fiber reinforced polymer (Al/CFRP) crash boxes under dynamic axial impact, with particular focus on the influence of winding angle configurations. An explicit finite element model, validated against both experimental and numerical results from the literature, was developed using finite element software. The parametric analysis systematically varied CFRP winding angles from [±15°]₅ to [±85°]₅ in 10° increments and compared the outcomes with single and double cell aluminum crash boxes. Key crashworthiness indicators, including peak crushing force (PCF), mean crushing force (MCF), crushing force efficiency (CFE), stroke efficiency, and folding stability, were evaluated. The results reveal that hybridization significantly enhances load bearing capacity compared to conventional aluminum designs. Intermediate winding angles from 35 to 55 degrees yielded the best balance between PCF reduction, MCF enhancement, and stable progressive folding, with the [±45°]₅ configuration achieving the highest MCF and CFE, while [±35°]₅ minimized PCF. In contrast, winding angles greater than or equal to [±65°]₅ generated excessively high PCF, compromising occupant safety. The findings provide actionable insights for the design of hybrid crash boxes, demonstrating that optimized fiber orientation can advance crashworthiness beyond current aluminum or narrow angle hybrid configurations.