bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multistep finite-control-set model predictive control of active power filter
Authors: Bi EnZi , Yang JianFeng , Liu Yang , Wang XiaoQing 
Published: December 2020

Abstract
The traditional finite-control-set model predictive control (FCS-MPC) of three-phase active power filter (APF) has the problems of low compensation precision and long control delay. In order to address this problem, this paper proposes a multistep prediction compensation control method for the FCS-MPC of APF, it does not require modulation of PWM link. By utilizing the discrete mathematic model of three-phase parallel APF and keeping the advantages of traditional FCS-MPC, the prediction model is established based on the structural model of traditional FCS-MPC, the predictive controller is designed for predictive control of DC-side voltage. AC-side current and fixed switching frequency, and simulation study is also conducted. The simulation results show that the multi-step predictive control method can effectively track and compensate harmonic, reduce the harmonic component of power grid, and increase the compensation precision of parallel APF.
Research on Constant Current Technology of High Current Power Amplifier for Relay Protection Test Device
Authors: Zhou Xueqing , Zhao Yuhao , Li Tiecheng , He Lei , Wang Xianzhi , Yuan Zhenyu 
Published: December 2020

Abstract
In order to provide more accurate and consistent reference current for power system under different loads, the constant current performance of the high-current power amplifier is studied. This paper presents a circuit topology suitable for high-current power amplifier circuits, and analyses the key factors that affect its constant current characteristics. It is found that resistance matching plays a decisive role in the constant current characteristics. Through quantitative analysis and verification, the boundary conditions of the output resistance of the high-current power amplifier under the specified resistance accuracy are also found. Then based on Monte Carlo analysis and worst-case analysis, the previous theoretical derivation afterwards is conducted. Finally, an effective method of resistance matching is brought forward, which is authenticated in the contrast test later.
A Novel Hybrid Piezoelectric-Electromagnetic Micro-Power Generator by Harvesting Low Frequency Acoustic Energy
Authors: Chen Yuansheng , Gu Cong , Chen Wei , Zhao Pengcheng 
Published: December 2020

Abstract
In order to harvest low frequency acoustic energy, a novel hybrid piezoelectric-electromagnetic micro-power generator was developed with Helmholtz resonator, piezoelectric patch, coil and permanent magnet. When the sound waves enter Helmholtz resonator, piezoelectric patch and coil will be vibrated then the electric energy are generated from them. With Multisim software, the circuit of proposed micro-power generator was simulated and its output performance was analysed. Results show that there is always an optimal resistance to maximize the output power of the novel hybrid piezoelectric-electromagnetic micro-power generator. Especially when the sound waves at 82Hz, the output power of proposed hybrid generator can more than the sum of independent piezoelectric and electromagnetic micro-generator. It indicates the power generation efficiency is significant significantly improved by the proposed hybrid method.
Study on the Microscopic Mechanism of Adsorption Layer on the Surface of Particles in Nanofluids
Authors: Zhang Liang , Tian Linchao , Zhang Anlong 
Published: December 2020

Abstract
In this paper, the method of molecular dynamics simulation is used to study the Cu-Ar nanofluid. It is found that when Cu nanoparticles of different volume fractions are added to liquid Ar, the thermal conductivity of the nanofluid can increase by 32.1%; adding different sizes of Cu nanoparticles. In the case of particles, the thermal conductivity of nanofluids can increase by 15.2%. On this basis, the strengthening mechanism of the thermal conductivity of the nanofluid was analyzed from a microscopic point of view, and it was found that the microstructure of the base fluid has changed after adding nanoparticles. The degree of change of the microstructure of the base fluid is greatly affected by the size of the nanoparticles. The closer to the nanoparticle base fluid, the more significant the microstructure changes. The thickness of the adsorption layer was calculated by dividing the surface of the nanoparticle and tracking the movement trajectory of Ar atoms in these areas and counting changes in the number of argon atoms. It was found that the adsorption layer was a key factor leading to the improvement of the thermal conductivity of nanofluids.
Experimental research on the decay charateristics of GIS busbar residual voltage/charge
Authors: Jiang Kui , Fu Zhong 
Published: December 2020

Abstract
GIS is the significant equipment in UHV network. However, after the UHV GIS busbar switch is opened, there will be a higher residual voltage on the GIS busbar, which causes the basin insulator flashover during the commissioning of the substation, which seriously affects the insulation and safety performance of the power system. It is very necessary to study the residual voltage on the GIS busbar. Therefore, we established a set of the GIS busbar residual voltage measurement system. Based on electric field measurement method, the GIS busbar residual voltage is measured in sulfur hexafluoride gas. The decay characteristics of the GIS busbar residual voltage under different polarity, different amplitude voltage and different temperature are studied. Research shows that the GIS busbar residual decays exponentially, and the decay of residual voltage is closely related to amplitude, temperature; at 26 °C and 0.4 MPa SF6 gas, the decay time of the GIS busbar residual voltage is as long as 22 hours after applying +450kV DC voltage, and the decay time constant is about 104 s order of magnitude.
Macro excel (VBA) implementation in designing booking information systems in uniform convection (Case Study: Kholidi Taylor SME, Medan Denai)
Authors: Ishak Aulia , Ginting Rosnani , Amalia Tasya 
Published: December 2020

Abstract
The development of information technology today is very influential in every field of work, especially in Small and Medium Enterprises (SME) which often require the implications of these technologies to support their work. This information technology is expected to help work become faster, more accurate, flexible, and efficient. Kholidi Taylor Convection SME is a business that produces uniforms or printed screen printing that can be customized by its buyers. Therefore, this SME needs an information system that can provide a place for buyers to order the uniform they want easily. This study uses the VBA Macro Excel application where this application will be used by buyers to order the desired uniform. Data Flow Diagrams (DFD) are needed to determine the most important entities and their correlation in order to create a good VBE ordering application.
Integration of Kano Model and Quality Function Deployment (QFD) to Improve Product Quality: A Literature Review
Authors: Ishak Aulia , Ginting Rosnani , Suwandira Bayu , Fauzi Malik Alfin 
Published: December 2020

Abstract
Companies must continue to improve service quality in order to face increasingly fierce competition. The design developed by the company must be a design that prioritizes the needs and wants of consumers. The purpose of this literature study is to make an analysis and synthesis of existing knowledge related to the topic to be studied in order to find gaps for the research to be carried out. In product design and development, there are many methods that can be used, one of which is using the Kano model and the Quality Function Deployment method. The kano model is widely applied as a useful tool for understanding customer needs and analyzing the effect of meeting customer needs on customer satisfaction levels. Meanwhile, Deployment Quality Function is used to translate the needs and desires of consumers which are then developed to meet product and service design requirements. This paper explains the extent to which the two methods are applied, namely the Kano model and the Quality Function Deployment method by analyzing several relevant journals. The author hopes that this paper can be used as a future reference for researchers in product design.
Facility Layout Redesign with Static Facility Layout Planning (SFLP) and Dynamic Facility Layout Planning (DFLP) at Convection and Computer Embroidery Industry
Authors: Tarigan U , Ishak A , Simanjuntak L S , Rizkya I , Putri K S , Tarigan U P P 
Published: December 2020

Abstract
UD. XYZ is a private company engaged in the convection and computer embroidery industry. This company uses raw materials in the form of fabrics to make various kinds of products such as t-shirts, shirts, training pants, jackets, emblems and various types of clothing. Problems that are being faced by this company is a cross-movement, low efficiency, and layout of facilities that do not consider consumer demand for the product so that it can affect the flow of material and increase material handling costs. Based on these problems, this research was conducted to redesign the layout of facilities with Static Facility Layout Planning (SFLP) and Dynamic Facility Layout Planning (DFLP). The method used in redesigning the layout is software CRAFT (Computerized Relative Allocation of Techniques). After redesigning the facility layout with SFLP, material handling costs amounted to IDR 393,510.01 or a cost reduction of 7.41% while the redesign with DFLP had a total cost amounting to IDR 345,685.11 or a reduction in costs of 18.66%. The results of this study show that the proposed layout chosen is the proposed layout with DFLP.
Optimizing Production Line Using the Rank Positional Weight (RPW) Method at PT. X
Authors: Ginting Rosnani , Lumongga Nst Alfri 
Published: December 2020

Abstract
Line balancing is a series of work stations (machinery and equipment) that are used in manufacturing products. Line balancing usually consists of a number of work areas called work stations handled by one or more operators and it is possible to be handled using a variety of tools. The purpose of research in the case of the production line is to obtain the lowest RPW weight value from the production PT. X with Rank Potential Weights method which is optimal for production lines without bottlenecks at the work station. The allocation of elements at work stations is limited by main constraints, namely zoning constraints. This method is usually better known as ranked positional weight system (RPW). The first step is to make a precedence diagram and precedence matrix. Calculate the positional weights for each element obtained from working time of that element. Calculating the production process time, each work element requires a cycle time using stopwatch time study. The method of ranking positional weight system (RPW) in this case the Production Track is in the initial condition with a cycle time of 1857 seconds and there are 5 work station. The known value of balance delay is 26.74%, efficiency is 37.34%.
Lassy dairy farm business development strategy using business canvas model method
Authors: Hasan Alizar , Tri Putri Nilda , Fithri Prima , Disti Adzhani Siti 
Published: December 2020

Abstract
Lassy is one of the small medium enterprises which produces processed dairy cattle, located in West Sumatra. The number of demands that tends to increase and the superiority of products without preservatives supports Lassy Dairy Farm to expand more widely. To increase the number of products, product quality and expand the marketing area of the product in order to be able to compete with similar products, proper business strategy planning is required. This study aims to design a new business model at Lassy using the Business Model Canvas (BMC) method and SWOT analysis. IE matrix results show that Lassy rank is at cell IV, which means that Lassy is in a growing and developing state. The strategy that can be carried out by Lassy Dairy Farm is based on the results of the SWOT matrix with an intensive strategy, an integration strategy, and a diversification strategy. The main strategy that Lassy can do is intensive strategy with a total score of attractiveness of 7.272. This intensive strategy is illustrated in the business model in the proposed Business Model Canvas.
Increase Productivity by Eliminating Waste and Using Systematic Layout Planning in Airline Catering Service
Authors: Rizky Alfiansyah Nofal , Awibowo Setijo , Saraswati Triarti 
Published: December 2020

Abstract
This research is conducted in PT. XYZ Indonesia facility. In addition, PT. XYZ is an inflight catering service provider. The purpose of this research is to solve the company problem that occurred in the dishwashing area, which is unable to meet the flight demand expectation. In order to analyze the problem, this paper is implementing the DMAIC framework methodology. After defining the problem that occurred in the dishwashing area, the data will be gathered, and it will be used for developing a new alternative layout. Furthermore, changing the plant layout process will follow a systematic layout planning procedure, and it will be supported with Tecnomatix simulation to simulate the improvement situation. As a result, new alternative layouts are being proposed to increase productivity in the operational area. Also, to maintain the quality of the operation process, a new standard operating procedure and audit form are being proposed to the company.
A Review: The Use of Nanoparticles in Cutting Fluid as an Effort to Improve the Performance of Hard Machining in Sustainable MQL Systems
Authors: Panjaya D , Ginting A , Nasution D Y 
Published: December 2020

Abstract
To obtain high machining performance on metal cutting, several supporting factors include the selection of tools and workpieces. To obtain the environmentally friendly cutting conditions known as green machining currently a minimum quantity cutting fluid (MQL / MQCL) is required. Based on the literature related to green machining problems in the material cutting process, this paper focuses on the addition of nanoparticle additives and observes aspects of operator safety and environmental pollution. The focus of selecting machining methods is in the form of dry and wet machining, the use of minimized fluids (MQL), and the use of vegetable oil as the base material for cutting fluids. The approach taken to focus attention is MQL / MQCL, the use of tools, and machinability which includes machining process parameters. Most of the studies indicated that the addition of nanoparticles to the developed cutting fluid had a significant effect on the machining performance parameters using the MQL / MQCL method. The study presented in this paper is a summary analysis of the impact of the nanoparticles on cutting fluid developed on the performance of the machining process carried out to help generate new research ideas for realizing green machining technology in the future.
MQL Applied for Hard Machining of Ferrous Alloys Using Hardmetals: A Review
Authors: Dalimunthe F N , Ginting A , Sutarman  
Published: December 2020

Abstract
Today, mostly of machining process is carried out under dry machining or minimum quantity lubricant (MQL) method. The MQL is considered as the proper solutions to reduce the amount of lubricant. This is not only reducing in cost, but also maintaining the machine life, safety, and environmentally friendly. Previous research was attempted to develop a minimum quantity cooling technique that made a major contribution to the solution of problems that affect the parts of dry machining operations. However, a gradual phase tool wear should be conditioned to make the tool work optimally and reach better performance. Therefore, this study is aimed to review the effect of the MQL use for both cermet and carbide tools that focused on the tool wear, tool life and economic advantage in hard machining process. The review revealed that MQL with cermet tool derives the good quality lubrication, better penetrates to the cutting area, reduce the cutting temperature, and increase the quality of the surface roughness, thus it recommended instead of carbide for hard machining.
A Review: Palm Oil-Based Cutting Liquid for MQL System Feeders in Hard Machining Application
Authors: Purba U I , Ginting A , Nasution D Y 
Published: December 2020

Abstract
The cutting fluid has an important role to cool the cutting zone by lubricating the workpiece surface and cutting tools. But if the use of cutting fluid and the disposal method is not carried out properly it can affect human health and have a negative impact on the environment. In addition, expensive cutting fluids make industrial production costs increase. Currently, among the various techniques that exist in metal cutting, one of them is the MQL (Minimum Quantity Lubricant) technique, which is a cutting technique using an air jet to flow it (cutting fluid droplets) into the cutting zone. in the form of a spray. This paper contains an explanation of the MQL technique and various cutting fluid engineering. Several experimental studies suggest that the MQL technique provides better surface finish than dry and wet machining. In addition, the MQL technique also has other advantages such as reducing the coefficient of friction, tool wear, cutting temperature, cutting force compared to dry and wet machining techniques. Therefore, the MQL technique is a viable alternative to lubrication. In addition, the cutting fluid used must also be able to decompose naturally (biodegradable).
Numerical Simulation The Fluid Flow of a Triple Concentric Tube Heat Exchanger with Computational Fluid Dynamic (CFD)
Authors: Ginting Terang U H S , Sitorus Tulus B , Ariani Farida , Julianto T E 
Published: December 2020

Abstract
Heat Exchanger (HE) is an important equipment in engineering application. It is widely used in many industries, such as automotive industries, power plant and food industries etc. This study aims focuses on Triple Concentric Tube Heat exchanger which it developed from double tube HE to know outlet temperature each fluid with Computational fluids dynamic method and then experimental study is used to validation for this study. It used for cooling water with the same fluid, in this research variation are inlet hot fluid temperature 50°C, 55 °C, 60 °C and mass flowrate 0.0249kg/s, 0,033kg/s and 0.041kg/s counter flow fluid.
The presence of stearamide as a rubber chemical in silica loaded-styrene butadiene rubber: The curing properties
Authors: Dhoni R , Ginting M , Surya I 
Published: December 2020

Abstract
This research-study investigated the influences of stearamide on the curing properties of silica-loaded styrene-butadiene rubber (SBR). The SBR was loaded with silica at a fixed loading (thirty phr) and the stearamide was added into the silica-loaded SBR compounds with varied doses from two to eight phr. The influences of stearamide additions on the scorch time, optimum curing time and cure rate index (CRI) of silica-loaded SBR were investigated. It was observed that the stearamide caused an enhancement in the rate of the curing process on the SBR compounds. The stearamide decreased both the times to scorch and optimum curing times but increased the CRI. The bigger the stearamide doses caused in the lower were the scorch time, curing time and CRI. The decreases in CRI was attributed to the role of a reactant that interacted chemically inside the silica-loaded SBR compounds. The amine content of stearamide presumably triggered the chemical reaction between the SBR, silica filler and amine itself.
The incorporations of palmitamide as a rubber chemical into carbon black-loaded styrene-butadiene rubber: cure rate index and torque properties
Authors: Khosman H , Hafni K N , Surya I 
Published: December 2020

Abstract
This study studied the effect of palmitamide as a new rubber chemical on the index of healing rate and torsion properties of carbon black (CB) (CB) charged styrene-butadiene rubber compounds. SBR was loaded with CB at a fixed load (thirty phr) and palmitamide was added to the CB-loaded SBR compound at doses varying from two to eight phr. The effect of palmitamide addition on the healing rate index and torsional properties of SBR CB loads were investigated. It was revealed that palmitamide caused an increase in the speed of the healing process in SBR containing CB. The greater the palmitamide dose, the higher the CRI. The increase in CRI is associated with the role of palmitamide as an additional accelerator for CB-loading SBR. The amine content of palmitamide increases CRI. It was also revealed that palmitamide lowers the minimum torque but increases the maximum torque as well as the torque difference by up to six palmitamide additions. The minimum torque reduction is due to the plasticizing effect of palmitamide. The increase in maximum torque and difference in torque is due to the increased intercalation process due to the action of palmitamide as an acting agent which increases CB dispersion.
The Success of 5S and PDCA Implementation in Increasing the Productivity of an SME in West Sumatra
Authors: Zadry H R , Darwin R 
Published: December 2020

Abstract
SME X is one of the micro, small, and medium enterprises in Padang, West Sumatra, engaged in the manufacture of handmade shoes. SME X has four work stations for the production process. There were found problems related to defects in shoe products with an average of 12% per month. After identifying the causes using fishbone diagrams, problems were found related to the categories of Man, Methods, Machine, and Material, which could be solved by implementing the 5S (Seiri, Seiton, Seiso, Seiketsu, and Shitsuke) concept and PCDA (Plan, Do, Check, Action) methods. After implementing the 5S and PDCA for one month, there was a decrease in defective products from 12% to 0% per month. Costs incurred during the implementation of the 5S and PDCA concept are Rp. 708,000, which is classified as economical because it is only done once during the implementation process and reduces losses due to defective shoe products, which were previously Rp. 1,250,000 per week to zero. It is very beneficial for the company to increase revenue and profit from sales. In terms of workers, there is an increase in productivity, and workers can work effectively, comfortable, safe, healthy, and efficient.
Analysis of Human Error Risk with Human Reliability Methods in Construction Projects
Authors: Priska Sinabariba M A , Ghifari M R , Muslim E , Moch B N 
Published: December 2020

Abstract
Work injury rates in Indonesia are relatively high, resulting in an urgency to maintain the safety of workers whose numbers are increasing. The biggest sector contributing to work accidents in Indonesia is the construction area, including building construction and causing large physical and financial losses. Workplace accidents are usually caused by human error and are strongly related to human reliability. The use of Fuzzy Cognitive Reliability and Error Analysis Method (Fuzzy CREAM) method is aimed at research to analyze patterns of worker behavior that affect the risk of workplace accidents combined with Bayesian Network simulation. 176 construction workers in the Jakarta and surrounding areas became the object of research. The value of Human Error Probability (HEP) was successfully obtained and the solution was given based on the characteristics of workers in the Control Mode category.