http://repository.president.ac.id/xmlui/handle/123456789/11089 2026-04-22T11:42:38Z 2026-04-22T11:42:38Z Anggraini, Lydia; et all. http://repository.president.ac.id/xmlui/handle/123456789/11747 2024-01-25T03:20:56Z 2023-01-01T00:00:00Z

Enhancing Comfort and Handling in Semi-Active Suspension Systems with Fuzzy Controller Anggraini, Lydia; et all. The pursuit of driving comfort and superior handling performance in vehicles has been a long-standing goal in the field of automotive engineering. The emergence of semiactive suspension systems represents a significant leap forward, offering a dynamic compromise between traditional passive systems and complex active systems. However, achieving optimal control of semi-active dampers remains an important challenge. The introduction of fuzzy controllers revolutionized this landscape, introducing a new approach to suspension control. This paper presents a comprehensive exploration of the development, principles, and applications of fuzzy controllers, demonstrating their transformative impact on vehicle dynamics. The controller outcomes indicate that the sprung mass acceleration, tire load, and suspension distortion were significantly reduced with average percentages of 15%, 2%, and 5%, respectively. 2023 International Conference of Computer Science and Information Technology (ICOSNIKOM); p. 1-5.

2023-01-01T00:00:00Z Anggraini, Lydia Josep Ginting Trivia Nola Kazunori Takagi http://repository.president.ac.id/xmlui/handle/123456789/11746 2024-01-25T03:12:45Z 2023-01-01T00:00:00Z

Efficiency enhancement of die design for G2R-1A relay terminal using progressive tool Anggraini, Lydia; Josep Ginting; Trivia Nola; Kazunori Takagi A progressive die is a set of tools performing series or several sheet-metal operations with a single tool. It has two or more workstations for the production of products. Every pressing stroke involves one operation, and the strip stock advances through the die strip. The main functional advantage of progressive die for the manufacturing industry is that it takes less time and gives a high volume of production. It can build precision tools with less time-consumption. The main task is to design a die for one of the parts of a relay product called G2R-1 Station Terminal A. The process of making this part is ineffective and uncomfortable under these conditions because it must go through three different stages of the process, which is a waste of time. This study discusses the design using the progressive die concept from Excess Hybrid or the CADD application as the initial sketch and Solid work as the visualization to achieve cost effectiveness and shorten the production process time. The result of total cost saving is 528,200,151 IDR per year. Materials Today: Proceedings 2023; p. 1-7.

2023-01-01T00:00:00Z Anggraini, Lydia Fikri Aulia http://repository.president.ac.id/xmlui/handle/123456789/11745 2024-01-25T02:52:48Z 2023-01-01T00:00:00Z

Design and efficiency optimization of deep drawing for sustainable electric pole cap application Anggraini, Lydia; Fikri Aulia Deep drawing is one of the most frequently used plate-forming methods. This process forms materials by a cold working system. Like other press tool processes, the deep drawing process is also assisted by press tools, press machines, and other components that are tailored to accommodate the desired product being produced. Electric pole products consist of several pipes and a cover in the form of a semicircular plate of a certain size which is then assembled using electric arc welding. This part of the electric pole cover is made using deep drawing and blanking processes. Making products using the deep drawing method must be done with proper analysis and planning. For this reason, the dimensions of the product, the type of material, and the required strength need to be determined. The electric pole cover is made using ST37 material which is equivalent to AISI 1045 with a thickness of 2 mm and a tensile strength of 370 N/mm2. materials today proceedings 2023; p. 1-5.

2023-01-01T00:00:00Z Anggraini, Lydia Putri Laila Anggraina Temmy Wikaningrum http://repository.president.ac.id/xmlui/handle/123456789/11744 2024-01-25T02:29:19Z 2023-01-01T00:00:00Z

Biosilica forming by sol-gel extraction method of rice husk ash Anggraini, Lydia; Putri Laila Anggraina; Temmy Wikaningrum Indonesia, as an agricultural country, produces much waste, especially from rice husk, which is a source of silica (SiO2) production. Rice husk contains about 87% - 97% SiO2 after complete combustion. SiO2 extraction from ash of rice husk is carried out using an extraction process of solid-liquid with an alkaline as a solution solvent. The solidliquid extraction process was done with 10 grams mass of rice husk ash added with 80 ml of potassium hydroxide (KOH) solution with a concentration of 10%, 15%, and 20% to extract the SiO2 content with an operating time of 60 minutes. After the extraction process is complete, the solution is added with 1 N hydrochloric acid (HCl) to precipitate the SiO2. The SiO2 formed is then separated from the rest of the solution by filtration. The drying process is carried out to remove the moisture content of the resulting SiO2. In this systematic study, HCl-washed rice husks were carried out in a muffle furnace for 60 minutes. The results showed that the samples produced SiO2 with a polycrystalline structure, as confirmed by the results of analysis of the Energy-Dispersive X-ray Spectroscopy (EDS) that could be produced by solid-liquid extraction of KOH from rice husks ash. The amorphous SiO2 has potential application as natural filler in rubber and environmentally friendly natural compounds. Proceeding of International Conference on Energy, Manufacture, Advanced Material and Mechatronics 2021; p. 1-7.

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