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Majalah Ilmiah Pengkajian Industri
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : 14103680     EISSN : 25411233     DOI : -
Core Subject : Engineering,
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Transportation
MIPI, Majalah ilmiah Pengkajian Industri adalah wadah informasi bidang pengkajian Industri berupa hasil penelitian, studi kepustakaan maupun tulisan ilmiah terkait dalam bidang industri teknologi proses rekayasa manufaktur, industri teknologi transportasi dan kelautan, serta industri teknologi hankam dan material. Terbit pertama kali pada tahun 1996 frekuensi terbit tiga kali setahun pada bulan April, Agustus, dan Desember. MIPI diterbitkan oleh Deputi Bidang Teknologi Industri Rancang Bangun dan Rekayasa-BPPT
Arjuna Subject : -
Articles 601 Documents
 57   58   59   60   61 
Data Exploratory Analysis and Feature Selection of Low-Speed Wind Tunnel Data for Predicting Force and Moment of Aircraft Fitra Hidiyanto; Shabrina Leksono; Sigit Tri Atmaja; Rizqon Fajar
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i2.5285

Abstract

This paper discusses exploratory data analysis (EDA) and feature selection of aircraft test results in Indonesia's low-speed wind tunnels (ILST). First, we briefly explain input and output parameters and data processing to make readable and higher accurate data. Then, we used feature selection using embedded and random forest methods to find parameters that most affect the force coefficient of aircraft. The research activities carried out in this study are to review literature from either scientific journals, the internet, or books and interview with an engineer who tests aircraft models at ILST. Then create a program for processing data from test results, such as data extraction, data cleaning, exploratory data analysis, and feature selection with python. After applying the feature selection method, we found that all the methods show similar results and have succeeded in separating the powerful features from the weak ones with a significant score difference. We decide to use the Random Forest method. The three most strongest features in the coefficient of an aircraft model in the ILST test (CL, CD, CM25, CYAW, CROLL and CY) are the following: for CL are ALFA (0.984), T0 (0.008), P0 (0.004), on for CD is are ALFA (0.965), T0 (0.009), RE (0.007), in CM25 are ALFA (0.416), P0 (0.285), T0 (0.168), in CYAW are BETA (0.44), T0 (0.141), ALFA (0.141), in CROLL is BETA (0.79), ALFA (0.091), P0 (0.036), and in CY are BETA (0.842), ALFA (0.114) and T0 (0.014). The results of this paper can be used to help build a model for the coefficient of aircraft design using machine learning based on the data from the ILST test more effectively and efficiently. Keyword: Machine Learning, Feature Selection, Exploratory Data Analysis, Aircraft Modeling.
Planning Commercialization of Mobile Laboratory Product Technology Innovation Using Business Model Canvas Subiyanto; Miranti Budi Kusumawati; Sri Wijayanti; Unik Setiawati
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i2.5300

Abstract

A premise states that the success of product technology innovation determines the economic growth of a country. On the other hand, commercialization of product technology innovations has low success, and one of the reasons is the lack of careful planning. One of the national product technology innovations designed as a solution to controlling the spread of COVID-19 is a mobile laboratory (Mobile Laboratory Bio-Safety Level 2/MBSL-2) which was initiated by BPPT in early 2020. This study discusses the concept of planning the commercialization of product technology innovations. MBSL-2 uses the Business Model Canvas (BMC), with the intention that the results can be used as an innovation planning policy instrument, especially in government research institutions. Nine BMC elements are elaborated, namely customer segments, value propositions, channels, customer relationships, revenue streams, key resources, key activities, key partners, and cost structure. The results of the discussion show how BMC works in a systematic, structured, and measurable way so that it can explain the arguments and objectives for each element of the business process, as well as the harmonization of business strategy with technology strategy. The BMC display is simple but contains important business aspects, making it easier for all parties to understand the business concept of product technology innovation. This study recommends the use of BMC as a complete product technology innovation planning instrument for engineers in government research institutions. Keyword: Technological product,  mobile laboratory,  commercialization of product innovations, business model.
Cyclic Oxidation Behavior of HVOF Thermally Sprayed WC Cermet Based on AISI 1045 Steel Muhamad Waldi; Helmi Bagas Samudra; Ahmad Maulana Arkan Leksana; Djoko Hadi Prajitno; Haris Tjahaya
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i2.5311

Abstract

Thermal spray coating technology High-Velocity Oxygen Fuel (HVOF) has become one of solution for metal protect and parts recondition that work in critical environments such as oxidative, erosive, and corrosive. One of the thermal spray coatings (TSC) application has been carried out to improve the oxidation resistance of the Induce Draft Fan (IDF) as a part on coal fired steam power plant unit. Cermet WC10Co4Cr and WC17Co are intended to sustain the AISI 1045 steel substrate against the oxidative environment. In this works, the cyclic oxidation at a temperature 500oC were conducted to reveal the oxidation resistance behavior of the coatings. Several mechanical tests are also presented including surface roughness of the coatings, coatings microhardness, and coatings adhesion. The coatings morphology was also characterized using SEM microscope, as well as X-ray diffraction (XRD) for phase analysis after the oxidation test. KeywordHVOF, Oxidation resistance, Induce draft fan.
The Effect of Corner Radius of Square Thin-Walled Structures on Crashworthiness Indicators Jos Istiyanto; Harry Purnama; Joko Triwardono; Jekki Hendrawan
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i2.5314

Abstract

Generally, the crash box on automobile vehicles is a thin-walled structure with a square cross-section. The majority of research was carried out for a long time to find the optimum crashworthiness indicator. In this study, numerical simulations and experimental tests are used to investigate the effect of the corner radius of a square cross-section thin-walled structure on crashworthiness indicators. Quasi-static analysis with mild steel material produces the mean force (Pm) error value is less than 3% while varying the corner radius ranging from zero to 1 mm, 2 mm, and 3 mm shows energy absorption (EA) and peak force (Pmax) decreased. Keyword: Thin-walled square tube, Mild steel, Numerical simulation, Experimental test, Crashworthiness indicators.
Editorial & Reviewer, Acknowledgements, Preface, Contents & Abstracts Endro Tjahjono
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

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

Abstract

Study of Pedestal Column Foundation of Heater Structures After a Fire Accident
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 3 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i3.5400

Abstract

This paper has presented the study of concrete experiencing the fire of the pedestal column of the heater foundation structure after the fire accident. . The evaluation was done with the analytical method, which was conducted to find out the actual condition of an existing structure. Structure or components of the structure are categorized as a safe condition; if its design strength is greater or equal to the required strength or ORn >= Ru. Evaluation of the pedestal column structure with the analytical method was done by visual inspection, concrete quality inspection, cracking depth inspection, structural analysis with the finite element software and strength calculation of structure according to the requirement of SNI 2847 2013. The equipment used for concrete quality inspection is Digischmidt Hammer and PUNDIT. The result showed that there was a degradation of the concrete quality of less than 15%. However, with this condition, all of the pedestal column structures are still in a safe condition in receiving the load operation.  Keywords:  Concrete experiencing a fire, Concrete evaluation, Pedestal column, Required strength, Design strength.
Energy, Exergy, and Externalities Cost Rate Analysis of 300 MW Coal-Fired Power Plant: A Case Study
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 3 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i3.5405

Abstract

Three types of analysis conducted at one of Thailand's coal-fired power plants were reported in this paper. The analyses consisting of energy, exergy, and externalities cost rate analysis are aimed to analyse the largest energy loss and exergy destruction that occurs in the system, to assess the contribution of Energy externalities cost rate based on fuel price, and to determine potential cost saving. Energy loss at the condenser was the highest among major units of the Thai power plants, which contributed around 49.11% at full load condition and was followed by a boiler, turbine, etc. Furthermore, the boiler was identified as the highest exergy destruction producer, with around 57.73% of total exergy input into the system, followed by turbines, heaters, etc. Moreover, the energy and exergy efficiency of Thai's power plant was calculated to be around 35.60% and 31.76%, respectively. The highest externalities cost rate due to energy loss occurred in the condenser was about 0.56 $/s, whereas the highest externalities cost rate due to exergy destruction identified in the boiler was about 0.67 $/s. By improving boiler and turbine components, Thai's PP has a potential cost saving of around 21.2 million $/year, reducing 88.44% of the externalities cost of exergy destruction.  Keywords:  Energy loss, Exergy destruction, Externalities cost rate, Potential saving cost.
Design and Testing of a Bungee Cord Based Launcher for LSU-02 UAV Ari Sugeng Budiyanta; Fuad Surastyo Pranoto; Andreas Prasetya Adi; Agus Wiyono
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 3 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i3.5518

Abstract

The LSU-02 is one of the unmanned aerial vehicles (UAVs) developed by LAPAN (now BRIN). It has a good endurance and flight range, i.e., it can fly for four hours and up to 200 km. However, the UAV needs a good and long runway to do the takeoff and landing operations. In real missions, sometimes it is hard to find the proper runway. Therefore, a method for taking-off without a runway, namely using a launcher, is required. The two most frequently used launcher systems are pneumatic launcher and bungee cord launcher. However, based on our experience using the launcher for LSU-03 UAV, a pneumatic launcher is considered less practical due to its complex and heavy construction. For the LSU-02 to be able to carry out missions in remote areas, a simpler and lightweight launcher is needed. Therefore the bungee cord-based launcher was chosen. The initial requirement for the launcher is that the launcher should able to push the LSU-02 with a maximum takeoff mass of 15 kg put on a 7 kg cradle (total mass 22 kg) and reach the launch speed of 15.2 m/s at the end of launching track. The simulation result shows that the launcher needs a time of 0.28 s to achieve a velocity of 15.2 m/s. Meanwhile, in 0.28 s, the UAV travel distance is 2.55 m. This is the minimum effective length required by the launcher. The real launcher was built with an effective length of 2.7 m. The launcher was tested for launching the LSU-02 with the UAV takeoff mass of 14.4 kg and the cradle mass of 7.5 kg (total of 21.9 kg). It was able to successfully launch the LSU-02 in 0.27 s with a travel distance on the launching rail of 2.5 m. Keywords:  Bungee cord, Design, Launcher, LSU-02, Testing, UAV
Congestion Cost Analysis and Potential Loss of Private Vehicle on Jalan Jenderal Sudirman, Jakarta Adita Utami; Cut Lutfiah Zulfa; Asep Yayat Nurhidayat; Teuku M. Rasyif; Nurul Fajar Januriyadi
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 3 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i3.5533

Abstract

In recent years, many big cities have experienced congestion in the world, including DKI Jakarta. Rapid economic growth has led to high demand for travel in the City, and rapid urbanization is one of the causes of traffic congestion. Traffic congestion is a characteristic of urban areas caused by increased economic activity, increased productivity of population movement, and inadequate facilities. Traffic congestion causes lost travel time, losses due to vehicle emissions, and increases traffic accidents. This study discusses the amount of costs incurred by vehicle users who pass Jenderal Sudirman street when experiencing congestion. This study aims to provide an overview for private vehicle users of the amount of costs incurred when using a private vehicle when passing Jenderal Sudirman street. The method used in determining Vehicle Operational Costs (VOC) is a method developed by the Institute for Affiliation and Research and Industry (LAPI) ITB 1997, while getting lost costs due to congestion is reviewed based on VOC and time value with the Income Approach method. The results show a high difference in operational costs and the loss of time value which is the total cost loss due to congestion on the road. Keywords:  Congestion, Vehicle operating Cost, Lost Costs, Income approach
Chip Formation Analysis of the Turning of ST41 Steel Rieza Z Aldio; Muhyi Wahid Saputra; Dedikarni
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 3 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i3.5565

Abstract

ST41 steel is commonly used for the shaft of ships. The shaft tends to corrode due to the interaction with the water. To recycle the used ST41, welding is normally done to repair the damaged or rusted surface of the shaft. The turning process is then conducted to obtain a better surface finish. This research used three types of cutting tools with different geometry at their cutting angle of  800 , 850 , 900 . The chips from the turning process are collected and observed. Chip formation will indicate the quality of the turning process. The chip thickness and formation are observed to determine the effect of the cutting angle on the machining quality. The chip thickness value ranges between 0.13 mm to 0.3 mm, with a cutting angle of 900 producing the thinnest chips and 850 producing the thickest chips. Thicker chips indicate higher cutting force that leads to the wear of cutting tools. The cutting angle also affects obtained the chip formation. Several shapes are obtained, such as long continuous, medium, and short discontinuous shapes. A longer chip means a better process with less chatter on the cutting process. Long continuous chips are dominantly found by using 900 cutting tool. The other two angles are dominated by the discontinuous chips, with a slightly medium length of chips majorly found at 800 and short discontinuous chips recovered using an 850 cutting tool. From this research, it could be known that a 900 cutting angle will produce thinner and better chip formation. Keywords: Chip formation, Chip thickness, Cutting angle, Turning.

Page 60 of 61 | Total Record : 601

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