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8th International Conference on Instrumentation, Control, and Automation, ICA 2023

作者： Santoso, Bayu Ryan, Muhammad Mukhlish, Faqihza Kurniadi, Deddy Institut Teknologi Bandung Master Program in Instrumentation and Control Bandung Indonesia Badan Meteorologi Klimatologi Department of Instrumentation and Calibration Dan Geofisika Medan Indonesia Badan Meteorologi Klimatologi Dan Geofisika Center of Aviation Meteorology Jakarta Indonesia Faculty of Industrial Technology Institut Teknologi Bandung Engineering Physics Research Group Bandung Indonesia Faculty of Industrial Technology Institut Teknologi Bandung Instrumentation and Control Research Group Bandung Indonesia

ISBN: (纸本)9798350301274

The Automatic Weather Station (AWS) is an automated instrument designed to gather meteorological parameters within a given environment. The dataset obtained from AWS often contains missing values due to various factors such as sensor malfunction or transmission issues. Nonetheless, the data produced by AWS plays a vital role in weather analysis and prediction. In this study, the authors employ the Generative Adversarial Imputation Network algorithm to generate synthetic values for the missing data in the AWS dataset. The dataset is divided into four schemes, each exhibiting different distributions of missing values at 5, 25, 50, and 80 gaps, respectively. The synthetic values generated by the algorithm are subsequently compared to the ground truth values using the Root Mean Square Error (RMSE) and Mean Absolute Error (MAE) metrics. The findings demonstrate that for the air pressure parameter, both the 5 gaps and 25 gaps models exhibit RMSE and MAE values below 2 hPa. Similarly, the models for the air temperature parameter demonstrate RMSE and MAE values below 2°C. As for the relative humidity parameter, the models achieve RMSE and MAE values below 15%. Therefore, both the 5 gaps and 25 gaps models satisfy the error threshold established by the Badan Meteorologi Klimatologi, dan Geofisika for AWS data quality control. © 2023 IEEE.

关键词： Quality control

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Effect of Delignification Method on the type of Cellulose Water Hyacinth ( Eichornia crassipes) as a Material for Sustainable Sodium-Ion Battery technology 3

Effect of Delignification Method on the type of Cellulose Wa...

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3rd International Symposium on physics and Applications 2023, ISPA 2023

作者： Anugerah Putra Pradana, Revaldo Rafi Setopratama, Andyan Zulaiha Ahmad, Chanifa Prasetyo, Andry Nur Abti, Salsabilla Darminto Department of Physics Faculty of Science and Data Analytics Institute Technology Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia Department of Chemistry Faculty of Science and Data Analytics Institute Technology Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia Department of Material Engineering and Metallurgy Faculty of Industrial Technology and System Engineering Institute Technology Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia

Biopolymers developed for solid electrolyte materials of sodium-ion batteries are of great interest these days. The main precursor in the form of cellulose biopolymers has been successfully isolated from water hyacinths (Eichornia crassipes). The first stage is maceration using 2% NaOH to produce cellulose-Iα and Ethanol 60% to produce cellulose-Iβ by hydrothermal reaction process at 150 °C and continued at the bleaching stage with H2O2 solution at 50 °C until it changes color. Then the sample is washed to a neutral pH and dried in an oven at 60 °C. Cellulose-Iα yields were obtained with a yield of 33.98% and cellulose-Iβ of 39.11%. The cellulose-I that has been obtained is modified to obtain cellulose-II type by mercerization method, where cellulose-I type is reacted with 20% NaOH for 5 hours. The mixture is then washed to neutral and dried. Cellulose-II yield was obtained with a yield of 69.21%. Samples were characterized by XRD, FTIR, and SEM. The cellulose content of hyacinths before delignification was 36.69%. The cellulose content of hyacinths after delignification for cellulose-Iα and cellulose-Iβ types was 64.26% and 48.58% respectively. FTIR analysis proved the presence of hydroxyl and carboxyl functional groups in hyacinth cellulose. XRD analysis showed that all three samples were identified with cellulose-Iα, cellulose-Iβ, and cellulose-II amorphous structures with a crystallinity index of 28.62% and the largest crystallite size based on the hkl field (121) of cellulose-Iβ type samples was ∼10 nm. SEM analysis shows that cellulose-Iα, cellulose-Iβ has a slim fiber diameter size and straight, smooth surface and microfibrils around the fiber. While cellulose-II shows visualization of a diameter that looks larger and twisted, the surface is rough and there are no microfibrils around the fibers. © Published under licence by IOP Publishing Ltd.

关键词： Sodium hydroxide

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Review of alginate-based composites for 3D printing material

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Polymers from Renewable Resources 2024年第2期15卷 256-277页

作者： Bukit, Bunga Fisikanta Syamani, Firda Aulya Rochima, Emma Panatarani, Camellia Widiyastuti, W. Praseptiangga, Danar Nazir, Novizar Nurhamiyah, Yeyen Agustina, Siti Cibinong Indonesia Universitas Quality Berastagi North Sumatera Indonesia Research Collaboration Center for Marine Biomaterials Jatinangor Indonesia Department of Fisheries Processing Technology Faculty of Fishery and Marine Science Universitas Padjadjaran Jatinangor Indonesia Departement of Physics Faculty of Mathematics and Natural Sciences Universitas Padjadjaran Jatinangor Indonesia Functional Nano Powder University Center of Excellence Universitas Padjadjaran Jatinangor Indonesia Departement of Chemical Engineering Faculty of Industrial Technology and System Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia Departement of Food Science and Technology Faculty of Agriculture Universitas Sebelas Maret UNS Surakarta Indonesia Departement of Food Technology and Agricultural Products Faculty of Agricultural Technology Andalas University Padang Indonesia Cibinong Indonesia

The ability of alginates to form hydrogel solutions makes them a promising biomaterial for three-dimensional (3D) printing. Researchers are investigating several techniques to improve the alginate hydrogels’ quality, such as using alginate-based nanocomposites as materials for 3D printing. This review examines the material of alginate-based composites, the printing technique, and the applications of 3D printing alginate-based composites. Material composites for 3D printing include alginate with clay, a combination of alginate with polymers or biopolymers, and a mixture of alginate with metal oxide and carbon. The 3D printing material from alginate combined with polymers is usually used in the medical and green packaging industries, whereas a mixture of alginate with clay, metal oxide, and carbon 3D printing material is utilized in the environmental field. When considering printing procedures, extrusion techniques are the most affordable. Furthermore, the purpose of alginate composite characterization is to determine the impact generated by the material combinations. This characterization is carried out based on the intended application. However, it is common to employ mechanical, thermal, rheological, scanning electron, XRD, and FTIR analysis to identify the fundamental characteristics of the alginate composite according to research. © The Author(s) 2024.

关键词： Extrusion

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Automating RTGC with PID Control: Utilizing Camera-Based Image Processing and Object Detection

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IFAC-PapersOnLine 2024年第7期58卷 299-304页

作者： Steven Bandong Yul Y. Nazaruddin Augie Widyotriatmo Muhammad R. Miransyahputra Yan Setiaji Engineering Physics Doctoral Program Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Instrumentation Control and Automation Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia

The high traffic in the container yard requires effective management, and one method to address this is through automation. The Rubber Tyred Gantry Crane (RTGC) plays a crucial role in container yards. Automating the RTGC involves determining the container’s location and sway angle to provide feedback for the control system. The advancements in computer vision technology offer a unique solution to tackle these challenges. This paper proposes image processing as a means to sense the sway angle and MobileNet SSD to detect the container’s location. The proposed method yields accurate measurement results and is integrated with optimized PID-PD for position and sway angle control in RTGC. The effectiveness of the proposed method is demonstrated through successful performance in both simulation and experiments conducted on a laboratory-scale RTGC prototype.

关键词： port automation RTGC control system computer vision optimization camera based sensor

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Wireless Disturbance Mapping and Path Selection for Placement of Network Control system Components 2

Wireless Disturbance Mapping and Path Selection for Placemen...

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2nd International Conference on Mechanical, Electronics, Computer, and industrial technology, MECnIT 2018

作者： Joelianto, Endra Ghazali, Muhammad Zhaka Juhana, Tutun Instrumentation and Control Research Group Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Telecommunication Engineering School of Electrical and Informatics Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Wireless transmitters in measurement instruments act for transmitting data or signals using radio frequency or currently better known as WIFI by means of 2.4 GHz. WIFI is a wireless local area network (WLAN) communication network. With the existence of telecommunications, measurement and control in industrial processes are heading to a high level of reliability compared to the conventional wired instruments in reaching hard locations or dangerous and hazardous areas. However, this cannot be done easily especially in maintaining the communication performances. Research is needed on the reliability of the wireless transmitter itself. Several factors such as communication disruptions are new challenges for the industry of wireless technology manufacturers to be able to prevent or to minimize errors that can arise in wireless network control systems. Signal strength mapping is needed in designing wireless network control systems. In this paper, the mapping is performed by measuring the signal strength parameters (Power Level) and the use of channels (Channel Usage) at planned locations. The measurement results are then used as sample points in the mapping. Data show that the signal strength measurement at each channel has a maximum of - 60 dBm and a minimum of -105 dBm. Mapping is performed by using two methods, namely Inverse Distance Weight (IDW) and Spline Interpolation (SI) methods. The paper proposes an algorithm to select the appropriate wireless communication paths from the planned locations. The mapping results indicate the appropriate area to place the transmitter and the receiver devices in a wireless data transmission network. With good placement, it is expected that measurements using wireless transmitters have minimum disruptions. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Mapping

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Assessment of Electrocoagulation Control system Strategy in Textile Wastewater Treatment Plant

Assessment of Electrocoagulation Control System Strategy in ...

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International Electronics Symposium (IES)

作者： Bobby Efendy Estiyanti Ekawati Nazuwatussya’diyah Eko Mursito Budi Engineering Physics Program Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Engineering Physics Research Group Faculty of Industrial Technology Center for Instrumentation Technology and Automation Institut Teknologi Bandung Bandung Indonesia

ISBN: (数字)9781728195308

ISBN: (纸本)9781728195643

Electrocoagulation is a method of wastewater treatment that applies an electrical current into the liquid to coagulate the suspended particles. This study assessed two control strategies for electrocoagulation systems in wastewater treatment in terms of dynamic performances and energy consumptions. The first control strategy used the electrical current as a manipulated variable, and the second used the waste liquid flowrate instead. For either strategy, the controlled output was the turbidity of the product liquid. The assessment was conducted in an experimental setting, in a laboratory-scale, continuous pilot plant. The experiment began with the identification of the dynamic characteristics of the electrocoagulation process due to the combined changes in the electrical current between 1.8-5.2 Ampere and the changes in waste flowrate between 10.37-14.67 ml/s. First-Order-Process-with-Time-Delay equations approximated these processes. The statistical Analysis of Variance was used to select the best process condition to compare two control strategies. The associated Proportional Integral controllers were designed and applied for either strategy. The experiment showed that manipulating electrical current yield 7.48% longer settling time, but with significantly lower energy consumption throughout the electrocoagulation process. The result highlighted the benefit of using electrical current as of the manipulated variable in the electrocoagulation process in the pilot plant.

关键词： Wastewater Process control Control systems Liquids Current Sensors Wastewater treatment

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Bake plate control using a robust multiplexed model predictive control (RMMPC)

Bake plate control using a robust multiplexed model predicti...

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International Conference on Instrumentation Control and Automation (ICA)

作者： Endra Joelianto Iqbal Ginanjar Prasetia Instrumentation and Control Research Group Engineering Physics Study Program Bandung Institute of Technology Sandung Indonesia Engineering Physics Study Program Faculty of Industrial Technology Bandung Institute of Technology Sandung Indonesia

This paper proposes a robust multiplexed model predictive control (MMPC) for a bake plate control system. The bake plate is a multi-inputs multi-outputs (MIMO) system which is required to have uniform temperature. In bake plate sytem, the controller must be able to reduce the disturbances caused when placing a cold wafer inside. Results show that the proposed robust MMPC can outperform in attenuating disturbance compare with the MMPC and the standard MPC.

关键词： Robustness

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Design of Image-Based Autonomous Landing Instrumentation and Control system for Unmanned Quadrotor Vehicles

Design of Image-Based Autonomous Landing Instrumentation and...

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Information technology International Seminar (ITIS)

作者： Ihsan M. Fauzan Faqihza Mukhlish Aditya Prayoga Robby Azhari Ahmad Instrumentation and Control Master Program Faculty of Industrial Technology Institut Teknologi Bandung Engineering Physics Research Group and Center for Instrumentation Technology and Automation Institut Teknologi Bandung Engineering Department PT. Sas Aero Sishan

ISBN: (数字)9798331521295

ISBN: (纸本)9798331521301

The study designs an instrumentation and control system for autonomous quadrotor landing using a visual marker as the landing target. For landing process, the marker used as a landing target is an embedded ArUco marker, capable for detection for both long range and close-range detection. Position of the quadrotor relative from the ArUco marker is estimated using Perspective-N-Point pose estimation. The estimation errors compared to actual measurements are under 20 cm, which is less than the distance between ArUco border and its center. To keep camera for facing downward during the flight, the 2 axis inertially stabilization platform (ISP). The designed ISP can maintain the camera orientation even when quadrotor angle has changed. The landing control system is made for two different scenarios. First scenario is for landing with Global Positioning system (GPS) support, and the second scenario is without GPS support. The landing control system in GPS support scenario uses velocity setpoint to control the quadrotor while in without GPS support scenario, control system uses angle-thrust setpoint to control quadrotor. Quadrotor landing control system can attempt landing on top of the ArUco marker in both scenarios. The trajectory Mean Average Error (MAE) of x and y coordinates and radius of the landing process is (0.108, 0.326, 0.359) m for GPS support scenario and (0.301, 0.251, 0.436) m for without GPS support scenario.

关键词： Seminars Visualization Instruments Pose estimation Process control Control systems Cameras Trajectory Quadrotors Global Positioning system

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Design and Implementation of Obstacle Detection and Avoidance system for Autonomous Quadrotor

Design and Implementation of Obstacle Detection and Avoidanc...

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Information technology International Seminar (ITIS)

作者： Lutfi Rais Ismail Faqihza Mukhlish Eko Mursito Budi Engineering Physics Bachelor Program Faculty of Industrial Technology Institut Teknologi Bandung Engineering Physics Research Group and Center for Instrumentation Technology and Automation Institut Teknologi Bandung

ISBN: (数字)9798331521295

ISBN: (纸本)9798331521301

Unmanned aerial vehicles (UAVs) of the quadrotor type are widely used in both civilian and military applications due to their superior maneuverability, lower manufacturing costs, and the absence of crew risk. This has led to an increased demand for control and navigation systems that enable autonomous operation, allowing quadrotors to follow desired flight paths and avoid obstacles. In this study, an obstacle detection and avoidance system for an autonomous quadrotor was designed and implemented. The obstacle detection system can detect obstacles up to 7 meters away with a mean average precision (mAP) of 89.63%. The position estimation system can estimate obstacle positions up to 6 meters on the y-axis and 1.2 meters on the x-axis, with average errors of 0.146 meters and 0.019 meters, respectively. The flight route planning system uses the A* algorithm to calculate the shortest path to the target while avoiding obstacles. Based on test results, the quadrotor successfully detects obstacles, estimates their positions, determines the optimal flight route, and follows it with a mean absolute error (MAE) of 0.101 meters, demonstrating reliable autonomous operation.

关键词： Meters Seminars Accuracy Trajectory tracking Navigation Estimation Control systems Planning Reliability Quadrotors

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Morphology and electron circulation of ZTO (Zinc Tin Oxide) on SLG for CZTS thin film solar cell 20

Morphology and electron circulation of ZTO (Zinc Tin Oxide) ...

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20th IEEE Student Conference on Research and Development, SCOReD 2022

作者： Xian, Kang Jian Abdullah, Huda Yuliarto, Brian Akhtaruzzaman, Md Dzarfan Othman, Mohd Hafiz Fen, Yap Wing Mohamad, Md Fauzi Universiti Kebangsaan Malaysia Faculty of Engineering and Built Environment Dept of Electric Electronic and System Engineering Selangor Bangi43600 Malaysia Institut Teknologi Bandung Faculty of Industrial Technology Engineering Physics Department Bandung40132 Indonesia Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia School of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Johor Bahru81310 Malaysia Universiti Putra Malaysia Faculty of Science Department of Physics Selangor Serdang43400 Malaysia Universiti Tun Hussein Onn Malaysia Faculty of Technology Management and Business Batu Pahat Johor Parit Raja86400 Malaysia

ISBN: (数字)9781665474887

ISBN: (纸本)9781665474887

Among the 3rd generation of photovoltaics (PVs), Cu2ZnSnS4 (CZTS), having the kesterite structure, was one of the most promising absorber layer candidates for low-cost thin-film solar cells. Also, it was composed of earth affluent and non-Toxic elements, promising price reductions in prospect compared to CIGS solar cell. However, the common buffer layer for CZTS is Cadmium Sulphate (CdS). The CdS could be replace by a better material, Zinc Tin Oxide. On the other hand, ZnSnO3(ZTO) with several advantages, and the high field-effect electron mobility of ZTO with as high as 20-50 cm2/V s. The master plan was scrutinized opportunity to supersede the default CZTS buffer layer Cadmium Sulphate with Zinc Tin Oxide. In this research, the ZTO layer was deposited on top of the soda-lime glass (SLG). The Zinc Tin Oxide was deposited on top SLG through solution process method. The deposition was tested to show ZTO behavior changes on these layers. Morphological show more tin doped results in bigger grain size. The direct optical band gap of ZTO was calculated to be 2.7-3.02 *** Zn0.867Sn0.133OCδ shows conductivity of 26μA at 2V.) © 2022 IEEE.

关键词： Tin oxides

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