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INDONESIA
Indonesian Journal of Innovation Studies
Published by Universitas Muhammadiyah Sidoarjo
ISSN : -     EISSN : 25989936     DOI : https://doi.org/10.21070/ijins.v17i
Core Subject : Science, Education, Social, Engineering,
Computer Science & IT Education Engineering Law, Crime, Criminology & Criminal Justice
Indonesian Journal of Innovation Studies (IJINS) is a peer-reviewed journal published by Universitas Muhammadiyah Sidoarjo four times a year. This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.This journal aims is to provide a place for academics and practitioners to publish original research and review articles. The articles basically contains any topics concerning new innovation on all aspects. IJINS is available in online version. Language used in this journal is Indonesia or English.
Arjuna Subject : Umum - Umum
Articles 1,027 Documents
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RCM II Identifies Critical GTG Components and Maintenance Strategy: RCM II Mengidentifikasi Komponen GTG yang Kritis dan Strategi Pemeliharaan Zulfikar, Raihan Maulana; Firdaus, Rachmat
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2131

Abstract

General Background: Gas Turbine Generator systems play a critical role in industrial power generation, where failures can cause significant operational and safety risks. Specific Background: Conventional maintenance strategies are often reactive and fail to prioritize component criticality, leading to inefficient resource allocation. Knowledge Gap: There is limited application of structured Reliability Centered Maintenance II integrated with Failure Mode and Effects Analysis to systematically identify failure risks and optimize maintenance strategies in GTG systems. Aims: This study aims to apply RCM II to determine critical components, analyze failure modes using FMEA, and define appropriate maintenance strategies based on risk levels. Results: The analysis identifies key components such as the compressor and combustion system as high-priority failure modes, with RPN values reaching 360 and 336 respectively. Other components fall into medium and low priority categories. Maintenance strategies are classified into proactive tasks using RCM II, simple FMEA-based actions, and run-to-failure approaches. Novelty: The study integrates RCM II decision diagrams with detailed RPN-based prioritization for GTG maintenance planning. Implications: The findings provide practical guidance for improving maintenance efficiency, optimizing labor allocation, and supporting reliable operation in industrial energy systems. Keywords: RCM II, Gas Turbine Generator, FMEA Analysis, Risk Priority Number, Maintenance Strategy Key Findings Highlights Risk evaluation highlighted dominant failure contributors in power generation unit Structured prioritization grouped components into three maintenance categories Decision-based tasks defined preventive and corrective operational actions
Forged Piston Delivers Higher Power and Torque in Jupiter Z: RCM II Mengidentifikasi Komponen GTG yang Kritis dan Strategi Pemeliharaan Pahlewi, Muchamad Reysa; Fahruddin, Dr.A’rasy; Akbar, Ali; Mulyadi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2132

Abstract

General Background: Automotive development increasingly emphasizes component material selection and manufacturing methods to optimize engine performance. Specific Background: Pistons are critical engine components whose production route, particularly casting and forging, may influence power and torque characteristics. Knowledge Gap: Although many studies discuss piston materials and engine performance separately, direct comparative experimental evidence between casting and forged pistons under identical operating conditions on the Yamaha Jupiter Z 2007 remains limited. Aims: This study aims to analyze the differences in power and torque generated by standard, casting, and forged pistons using dynotest measurements at 2000, 4000, 6000, and 8000 RPM. Results: The results indicate that forged pistons produced the highest overall performance, with average torque reaching 13.32 Nm at 2000 RPM and average power reaching 11.2 HP at 6000 RPM. Casting pistons occupied an intermediate position, while standard pistons consistently produced the lowest values. At high engine speed, forged pistons maintained better performance stability than casting and standard pistons. Novelty: The study directly compares three piston types within the same motorcycle platform while also relating performance differences to piston mass variation, where forged pistons showed the lightest weight. Implications: These findings indicate that piston manufacturing type is closely associated with engine output, and forged pistons offer stronger potential for applications requiring higher power and torque performance. Keywords: Forged Piston, Casting Piston, Engine Performance, Power and Torque, Dynotest Key Findings Highlights Forged pistons produced the highest output across most engine speed ranges. Peak engine capability was observed around 6000 RPM before declining at 8000 RPM. Lower piston mass was associated with stronger high-speed performance stability.
Combined Aerodynamic Modifications Reduce Drag in MPV Vehicles: Modifikasi Aerodinamis Terpadu Mengurangi Hambatan Udara pada Kendaraan MPV Maydana, Adinda; Fahruddin, A'rasy
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2133

Abstract

General Background: Aerodynamic characteristics play an important role in vehicle performance because air resistance directly affects fuel consumption and maximum speed. Specific Background: Winglet bumpers and rear spoilers are commonly applied aerodynamic devices intended to regulate airflow around vehicles and reduce drag. Knowledge Gap: Although aerodynamic devices have been widely studied, limited experimental evidence directly compares the combined application of bumper winglets and rear spoilers on MPV-type vehicles under controlled wind tunnel conditions. Aims: This study aims to analyze the effect of bumper winglets, rear spoilers, and their combination on air drag acting on an MPV model. Results: Experimental testing was conducted in a wind tunnel using wind speed variations of 7 m/s, 8.5 m/s, and 10 m/s under four configurations: without modification, winglet bumper, rear spoiler, and combined modification. The results show that all aerodynamic modifications reduced drag force and drag coefficient compared with the unmodified model. The combined configuration produced the best result, achieving the largest drag coefficient reduction of 38% at 8.5 m/s. Novelty: This study directly compares individual and combined aerodynamic modifications on an MPV prototype using controlled wind tunnel testing. Implications: The findings indicate that the combined use of bumper winglets and rear spoilers offers a practical aerodynamic strategy for reducing drag and improving high-speed vehicle efficiency. Keywords: Aerodynamics, Drag Coefficient, Winglet Bumper, Rear Spoiler, Wind Tunnel Key Findings Highlights The combined configuration generated the lowest measured air resistance. The largest reduction was recorded at 8.5 m/s. Airflow became more stable with smaller wake formation behind the vehicle.
Static Load Simulation for Optimizing Automatic Fish Cracker Dough Mixing Machine Design: Simulasi Beban Statis untuk Mengoptimalkan Desain Mesin Pencampur Adonan Kerupuk Ikan Otomatis Setiawan, Mohamad Irvan Akif; Mulyadi; Fahruddin, A'rasy
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2134

Abstract

General Background Fish crackers are a popular Indonesian snack with a simple production process but high demand. Specific Background In Pasuruan Regency, SMEs struggle with manual dough mixing, which leads to inconsistent texture and high labor costs. Knowledge Gap Current traditional methods lack efficiency and structural consistency, requiring a more robust and hygienic automated solution. Aims This study aims to design and validate an automatic fish cracker dough mixing machine using static load simulations. Results The selection process using a morphological chart led to Concept A, which utilizes a 0.37 kW motor and stainless steel components. SolidWorks 2016 simulations revealed a maximum von Mises stress of 14.224 MPa and a maximum displacement of 8.74 mm under a 92 Nm torque load. Novelty The research introduces a highly stable frame structure (50x50x3 mm profile) with a safety factor of 13, significantly exceeding standard safety requirements for SME equipment. Implications This innovation allows for consistent 10 kg batch production, reducing manual labor and increasing the profit potential for local food industries. Keywords Dough Mixer, Fish Crackers, Morphological Chart, Static Simulation, Safety Factor Key Findings Highlights Concept A was selected as the optimal design using a systematic morphological chart and FEA validation. The frame structure achieves a safety factor of 13, ensuring high durability for small-scale industrial use. The automated system replaces manual labor with a 0.37 kW motor capable of handling 10 kg loads efficiently.
Ninety Ampere Welding Produced Superior Dissimilar Metal Joint Performance: Pengelasan 90 Ampere Menghasilkan Kinerja Sambungan Logam Berbeda yang Unggul Septian, Dhimas Wahyu Dwi; Mulyadi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2135

Abstract

General Background: Dissimilar metal welding is widely used in industrial applications where different materials are combined to balance mechanical strength, corrosion resistance, and economic efficiency. Specific Background: Carbon steel ASTM A36 provides good strength and low cost, while stainless steel 316 offers superior corrosion resistance, making their combination attractive for structural applications. Knowledge Gap: Although dissimilar metal welding has been widely studied, limited experimental data directly compare the effects of welding current and cooling media on tensile properties and macrostructure in ASTM A36 and stainless steel 316 joints using stainless steel electrodes. Aims: This study aims to analyze the effect of welding current and cooling conditions on the tensile strength and macrostructure of dissimilar metal welded joints. Results: Nine specimens were welded using current variations of 70 A, 80 A, and 90 A with air, natural air, and oil cooling. The highest stress value was 389.060 Kgf/mm² at 90 A with oil cooling, the highest strain value was 0.039 at 90 A with oil cooling, and the highest elastic modulus was 11,610 Kgf/mm² at 90 A with natural air cooling. Macrostructure observation showed that the 90 A natural air specimen had no visible welding defects, while the 70 A water-cooled specimen showed porosity, underfill, arc strike, and slag inclusion. Novelty: The study directly compares current variation and cooling media simultaneously in dissimilar metal welding between ASTM A36 and stainless steel 316. Implications: Proper current selection contributes to better tensile performance and improved weld quality in dissimilar metal joining applications. Keywords: Dissimilar Metal Welding, Welding Current, Tensile Strength, Macrostructure, ASTM A3 Key Findings Highlights The 90 A parameter produced the most favorable overall mechanical response. Defect-free weld morphology appeared under natural air cooling at high current. Lower current generated more visible discontinuities in the welded region.
Compact Bread Dough Mixer Achieved Three Kilogram Capacity: Mixer Adonan Roti Ringkas dengan Kapasitas Tiga Kilogram Rachmandani, Arif; Mulyadi
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2136

Abstract

General Background: Dough mixing is a crucial stage in bread production because it determines mixture uniformity and processing efficiency. Specific Background: Small-scale bakery production requires compact mixing equipment that is affordable, practical, and capable of handling moderate dough loads. Knowledge Gap: Existing studies discuss food-mixing machines, but limited attention has been given to the design of a compact bread dough mixer specifically intended for a 3 kg dough capacity. Aims: This study aims to design a bread dough mixer with a dough capacity of 3 kg by determining the appropriate frame configuration, transmission system, shaft dimensions, and mixing mechanism. Results: The design process produced a functional mixer configuration consisting of a structural frame, drive system, rotating shaft, and mixing blade arrangement sized to support a 3 kg dough load. Component calculations were used to determine the feasibility of the selected dimensions and operating mechanism. Novelty: The study presents an integrated design configuration focused on small-scale bread processing with a specific 3 kg operational target. Implications: The proposed design provides a practical engineering reference for the development of compact dough mixing equipment for household and micro-enterprise bakery applications. Keywords: Bread Dough Mixer, Machine Design, Mixing Capacity, Small-Scale Bakery, Mechanical Design Key Findings Highlights The machine configuration was developed for compact bakery operation. Component calculations supported stable rotational mixing performance. The design accommodated a three-kilogram dough load.
Battery Discharge Characteristics in a Modified Electric Bicycle: Karakteristik Pengosongan Baterai pada Sepeda Listrik yang Dimodifikasi Mahendra, Arif Wisnu Isha; Fahruddin, A’rasy
Indonesian Journal of Innovation Studies Vol. 26 No. 3 (2025): July
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i3.2140

Abstract

General Background: The increasing use of petroleum-fueled transportation has intensified concerns regarding air pollution and the need for alternative energy-based mobility systems. Specific Background: Electric bicycles represent a practical short-distance transportation option, and battery performance becomes a critical factor in determining their operational capability. Knowledge Gap: Although electric bicycles are increasingly discussed, limited experimental studies directly compare dry batteries and wet batteries under different load and travel-distance conditions in simple electric bicycle modifications. Aims: This study aims to evaluate the power consumption characteristics of a modified electric bicycle by varying load and travel distance using dry and wet batteries. Results: Experimental testing was conducted using 50 kg and 60 kg loads over distances of 200 m, 300 m, and 400 m. The findings show that greater load and longer travel distance increased battery power consumption. For the dry battery, the lowest power consumption was 0.24 V at 50 kg and 200 m, while the highest was 0.97 V at 60 kg and 400 m. For the wet battery, the lowest value was 0.37 V at 50 kg and 200 m, while the highest reached 1.12 V at 60 kg and 400 m. Novelty: The study provides direct comparative experimental evidence of discharge behavior between dry and wet batteries in a simple modified electric bicycle under controlled load-distance variations. Implications: These findings contribute useful engineering insight for selecting battery types and operating conditions in small-scale electric bicycle development. Keywords: Electric Bicycle, Battery Performance, Power Consumption, Load Variation, Travel Distance Key Findings Highlights Higher load consistently increased electrical energy usage during operation. Longer travel routes produced greater voltage reduction in both battery types. Wet-cell storage showed the largest discharge under the heaviest testing condition.

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