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INDONESIA
INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Published by Universitas Negeri Padang
ISSN : 14113414     EISSN : 25499815     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Transportation
INVOTEK: Jurnal Inovasi Vokasional dan Teknologi is a double blind peer-reviewed journal for Technical, Vocasional, Education and Training (VET) related research. This journal provides full open access to its content on the principle that making research freely available to the science community and the public supports a greater global exchange of knowledge and the further development of expertise in the field of Vocational Education and Training (understood in a wide sense and also known as e.g. TVET Technical Vocational Education and Training, Professional Education and Training, Career and Technical Education, Workforce Education).
Arjuna Subject : Umum - Umum
Articles 230 Documents
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Numerical Simulation of Designing a Braking System by Comparing Pressure in Minibus Type Vehicle Naufal Aflah Hibatullah; Adri Maldi Subardjah
invotek Vol 22 No 3 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i3.1039

Abstract

The braking system is crucial in maintaining the vehicle's safety to avoid fatality. However, designing a vehicle braking system can take significant time and energy. Hence, a method to design a braking system that requires less time and energy is necessary. The vehicle specifications will affect the braking design process in designing a braking system. In addition, the existing government regulations limit the braking capacity that must be achieved during the braking process. These two things become the limitations in designing an optimal braking system. The design process is carried out by determining the required pressure for the braking process and the pressure generated during the braking process. The generated pressure must exceed the required pressure for the braking system design to work appropriately. The conditions mentioned earlier can be achieved by iterating and selecting the standard component. A case study in the form of braking system design has been carried out where the braking system can generate a pressure of 4.14 MPa and requires a pressure of 3.13 MPa and 2.34 MPa at the front and rear caliper on a vehicle weighing 78.48 kN to decelerate 5 ms-2 as required in Indonesia government regulation. A comparison is made with other methods proposed by other researchers to ensure the proposed method can be applied to various conditions. The comparison results show that the proposed method can be applied to various conditions. Moreover, the proposed method can minimize the difference in pressure between the generated and the required pressure to avoid overdesign.
Design and Build Low-Cost Power Hammer Machine Based on Throttle Stomp Agus Sifa; Tito Endramawan; Dedi Suwandi; Ibnu Farhan; Rivay Febrio Maulana
invotek Vol 22 No 3 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i3.1065

Abstract

Metal forming uses plastic deformation to change the shape of the workpiece. Deformation or change in shape results from the use of a tool which is usually called a die. The die provides stresses that exceed the yield strength of the material (plastic). The forging process is one of several types of metal forming. A power hammer machine is a machine used for the formation of a product in the manufacturing process, namely with a system of continuous forging/pressure on the specimen so that the deformed specimen becomes denser and stronger according to the desired shape. The forging process is superior to other processes such as casting and machining. The effectiveness of the forging process is characterized by low costs, high productivity, and high product quality. The cold forging process needs to be improved to reduce the occurrence of fine cracks and defects. The main factor is the quality of forging results by planning the design and production of the right die, improving product quality, and reducing the number of defective products to encourage industrial competitiveness. The method in this research is the process of making the design and calculation of the main components and making the power hammer machine. The results of the design and manufacture of the power hammer machine obtained that the impact force from the design was 58.3 Kg, the rotation of the drive shaft to drive the hammer was 206.5 Rpm, the diameter of the driving shaft was 12.36 mm with the one made of 16 mm, the torque on the driving motor was 77.9 Nm, the minimum power designed is 2.2 hp with a rotation of 2800 Rpm, and is selected for the manufacture of 3 Hp, the electrical system is on / off using a throttle stomp.
Problem-Based Learning as a Learning Innovation Strategy To Improve the Motivation and Learning Outcomes of Distance Learning Handini Novita Sari; I Made Arsana; Ika Nurjannah
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1043

Abstract

Distance learning, which lasted long during the COVID-19 emergency, has led to student boredom in participating in the learning process. The impact is a decrease in learning outcomes, so innovative learning methods are needed to minimize this. This study will analyze the application of problem-based learning by considering learning outcomes and student motivation. The subjects of this study were 5th-semester Mechanical Engineering students. The design of this study used classroom action using the Kemmis and McTaggart models, which consisted of three steps: planning, acting and observing, reflecting, and carried out in two cycles. The research data was then analyzed quantitatively based on predetermined indicators. Based on this research study, it was found that learning outcomes data increased by 36% from cycle I to cycle II. The results of student learning motivation in Process I were 27.3% had high learning cycles, 63.7% had moderate learning cycles, and 9.9%. In cycle II, students' learning motivation increased from high, medium, and low, respectively, by 45%, 52%, and 3%. Based on the results of the analysis, this means that problem-based learning strategies improve learning outcomes and student learning motivation.
Design Analysis and Design of Coolbox Based on Thermoelectricity with Wind Power Plant Using 3D Modeling Andri Adi Seftandi; Siti Laily Masnah; Muhammad Ihsan; Airlangga Adi Satria; Wahyu Sunanda Abdul Imam; Apri Wiyono
invotek Vol 22 No 3 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i3.1054

Abstract

Energy needs continue to increase from year to year in line with population growth in Indonesia. Therefore, wind turbines as a renewable alternative energy source to meet the energy needs of coastal communities. The use of heavy and high ice blocks has always been a problem for fishermen in fish catches, this has an impact on the quality of the fish caught. This thermoelectric coolbox with wind power plant is designed by combining the components of a thermoelectric coolbox and a wind turbine which functions to maintain the temperature in the coolbox so that the fish stored are more durable using electricity generated from the rotation of the wind turbine. This research uses the design and development (D&D) method and is supported by secondary data from published articles and news journals which aim to design a three-dimensional model of a thermoelectric coolbox using solidworks software. The results of the design analysis obtained turbine area, turbine height, chord length, torque value, shaft diameter and allowable shear stress. With the results of the analysis of the design of a thermoelectric coolbox with a wind turbine, it has the potential and benefits for the fishing profession and can be realized into a product.
Improving the Quality of Learning Through Project Based Learning (PjBL) With the STEAM Approach in CAD Courses in the Department of Automotive Engineering Universitas Negeri Padang Irma Yulia Basri; M. Giatman; Mukhlidi Muskhir; Hansi Effendi; Ambiyar Ambiyar; Eni Elfina; Tri Putra Yuliardi
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1068

Abstract

The application of the Project Based Learning (PjBL) learning model in CAD courses has so far not been satisfactory. the results of the design drawings produced by students could not be implemented because the size, component layout, beauty did not meet the criteria. As a result, the students failure rate in CAD courses from 2019 to 2022 is quite high. PjBL with the STEAM approach is a solution because with STEAM the design of the images produced by students is based on criteria Science, Technology, Engineering, Art and Mathematics. This type of research uses Classroom Action Research, which is an examination of activities that are deliberately raised and occur in a class, and have 3 Cycle. The process of implementing the research consists of four components, namely planning, action, observation, and reflection. The population is Diploma 3 Automotive Engineering Students in Faculty of Engineering, Universitas Negeri Padang (FT UNP) who are enrolled in the CAD course for the Semester January - June 2022 and totaling 46 students. The data collection techniques through observation sheets and students performance in designing drawings using CAD software. The results of the study show that the implementation of PjBL with the STEAM approach can improve the quality of learning. The quality of learning observed is the activity of lecturers and students and learning outcomes. The percentage of lecturer activity in the learning process is 77% and increases in cycles 2 and 3 with percentages of 85.90% and 89.6%. While students activity in the learning process cycle 1 obtained a percentage of 62.4%, increased in cycles 2 and 3 of 73.20% and 87.70%. courses computer aided design using a project-based learning approach STEAM can increase the average value of students. This is based on the average grade of students drawing projects in cycle 1 of 33.04, Whereas in cycle 2 it was 69.80 and the average students score in cycle 3 was 76.42.
Implementation of Project Based Learning for Cognitive and Psychomotor Students in the Basic of Workshop Technology Course Welding Sub-competency in the Automotive Engineering Study Program Rahma Doni; Arif Algifari; Muhammad Irvan
invotek Vol 22 No 3 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i3.1073

Abstract

The higher education curriculum adopts project-based learning (PjBL) method that emphasizes the provision of knowledge with the problem solving in an organized work project within study group. This is such a solution for the problems of current conventional learning method implementation that made low enthusiasm and slow understanding student especially for Automotive Engineering student in having welding practice in The Basic Workshop Technology Course. By using experimental method in this research to compare conventional learning and PjBL method toward twenty Automotive Engineering students to evaluate cognitive and psychomotor aspect. On the steps, the lecturer starts with provides theoretical enrichment and end with welding practice. To find out the effect of implementing this project-based learning, lecturer divides the class in two study groups by differentiating learning methods, namely the group with conventional learning and the group with PjBL learning. Comparison is made between conventional learning and PjBL learning with projects processed by statistical interpretation. The results of the study showed that there was a significant effect on the results of the psychomotor evaluation of students, but not too significant for the cognitive evaluation results. Based on this research, there is a prove that PjBL is good enough to increase student’s abilities in welding practice as psychomotor representation increment.
Performance Analysis of Hydrokinetic Turbine Using Shroud Ratio Comparison under Yaw Misalignment Condition Arwizet K; Desmarita Leni; Deviya Aprilman; Adriansyah Adriansyah; Rivanol Chadry
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1091

Abstract

This research aims to analyze the performance of hydrokinetic turbines under yaw misalignment conditions using descriptive statistical methods on coefficient of power (Cp) data. Tests were conducted at water velocities of 0.7, 0.9, and 1.1 m/s for three types of turbine shrouds consisting of turbines without shrouds, turbines with two different types of shrouds, at yaw angles from 0° to 25° with 5° intervals. The study concludes that the performance of each turbine type is significantly influenced by the combination of water flow velocity and yaw angle. The diffuser type has the highest Cp value at every yaw angle, but its performance decreases with increasing yaw angle. The Blade type has poorer performance compared to the diffuser at every yaw angle and has the best performance at a combination of 1.1 m/s velocity and 5° yaw angle. Meanwhile, the shroud type has more stable performance and is not greatly affected by variations in velocity and yaw angle. Based on the analysis of changes in average Cp values with changes in yaw angle at V 0.7 m/s, all three turbine types experienced an increase in Cp value at a yaw angle of 5, with the shroud experiencing the most significant increase. At V 0.9 m/s, the diffuser and shroud types were able to maintain their average Cp values at every yaw angle, while the blade type decreased with increasing yaw angle and experienced a significant decrease at a yaw angle of 25. At V 1.1 m/s, the diffuser and blade types experienced a decrease in performance with every increase in yaw angle, but the shroud type was able to maintain the same Cp value and even experienced a significant increase at a yaw angle of 5.
Analysis of Digital Literacy Technology Design for the Department of Mechanical Engineering Based on a Website at Universitas Muhammadiyah Sumatera Barat Desmarita Leni; Muchlisinalahuddi Muchlisinalahuddi; Riza Muharni; Arwizet K
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1092

Abstract

This research aims to analyze the level of importance of digital literacy understanding among students of Mechanical Engineering at the University of Muhammadiyah (UM) Sumatera Barat. The digital literacy developed in this study not only facilitates access to learning references, literature, research methodologies, and testing in the field of Mechanical Engineering but also designed as a data storage place for student practical and research testing results. This research used a questionnaire as a data collection technique, which was filled out by Mechanical Engineering students at Universitas Muhammadiyah Sumatera Barat. The first questionnaire was conducted to measure the level of students' understanding of digital literacy in the field of Mechanical Engineering, and the results were used as the basis for creating a literacy website. The second questionnaire was conducted to evaluate the created literacy website. Data analysis was performed using quantitative descriptive analysis. The results showed that 57% of respondents had good understanding of digital literacy in the field of Mechanical Engineering. However, only 15% of respondents often searched for references on digital technology, and 80% of respondents faced difficulties in finding credible digital literacy sources. Moreover, most respondents expressed their interest in learning and using digital technology in research and practical work. These results served as the basis for creating a digital literacy website. The digital literacy website was evaluated, and the evaluation result showed that most respondents stated that the created literacy website was easy to use and helpful in the learning or task completion process. However, some aspects needed improvement, such as relevant and understandable content and the quality of content presentation that is more interesting for respondents. Overall, the literacy website has a high level of satisfaction in several aspects.
Analysis of Combustion Characteristics in Boilers Using Comparison of Coal Fuel Mixtures and Bark Biomass To Determine Optimal Combustion Conditions in a Steam Power Plant Tikkos Sihombing; Awaludin Martin
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1107

Abstract

Currently, several material production industries have used self-sustaining power generation systems. Where the most common steam power plant system is found as an option to be used as a source of electricity. The use of biomass as an additional material for fuel in power plant has been widely carried out. This method is more commonly known as cofiring. Analysis of the cofiring combustion system of biomass in the boiler needs to be carried out in order to determine the characteristics of the combustion system that occurs. By varying the composition of the fuel, an analysis of the energy produced from the combustion reaction will be calculated. In this study, the comparison of the use of coal and wood bark was varied at conditions 80:20, 70:30, 60:40, 50:50, 40:60, 30:70, 20:80. Assuming that the steam rate and temperature conditions to be achieved from the combustion products are constant. From the results of the analysis it was found that an increase in the amount of cofiring bark resulted in a decrease in the heating value of the combustion reaction and an increase in fuel capacity. Thus, it can be concluded that the use of bark cofiring in boilers with a coal design is less effective because it will require additional energy to increase the fuel consumption rate and reduce combustion efficiency due to not achieving optimal combustion energy because the initial design combustion chamber capacity is fixed.
The Effectiveness of Using Continuous Variable Transmission (CVT) in 2WD Buggy Vehicles I Putu Darmawa; I Made Anom Adiaksa; Ida Bagus Puspa Indra; I Wayan Suma Wibawa
invotek Vol 23 No 1 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i1.1109

Abstract

Continuous Variable Transmission (CVT) is a transmission system that does not have gears like in manual transmission cars or conventional automatic transmission cars. CVT has the advantage of being able to maintain the proper rotational speed at any time in terms of engine efficiency by changing the speed ratio flexibly and continuously. A continuously variable transmission (CVT) is a transmission that can change steplessly through an infinite effective gear ratio between maximum and minimum. This is in contrast to other mechanical transmissions which only allow a few different gear ratios to choose. The flexibility of the CVT allows the drive shaft to maintain a constant angular speed over the output speed range. Torque is transmitted from the drive to the pulley which is driven by friction acting between the belt and pulley surfaces. Tests were carried out using a dynotest to obtain wheel rotation data and the resulting torque. The loading is given from 3 kg, 5 kg, 7 kg and 8 kg, the engine rpm used is 5500 rpm, 6000 rpm, 6500 rpm, 7000 rpm and 8000 rpm. Rear wheel rotation is inversely proportional to the load, the greater the load the rotation will decrease. Load is directly proportional to torque, the greater the load given the torque will increase. The CVT system is still effective for use as a power successor. The power that can be transmitted is still greater than 50%, namely 68%.

Page 18 of 23 | Total Record : 230

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