Papers by Keyword: Design

Abstract: The technology of industrial machines continues to develop rapidly, especially in the main drive system such as the pneumatic system which is widely used in industrial machines. This must also be balanced with the ability of students to solve their problems. The pneumatic drive system is basically a device that converts air pressure into mechanical work that helps the operating process of industrial machines. The purpose of this study is to design machine components, create a pneumatic work system simulation tool, create a pneumatic system simulation tool to test the tool. The creation of this Pneumatic System Simulation tool is one effective way to help students understand and master the work system and repairs on industrial machines. There are three stages in this research, namely literature study, design and planning, and tool making. The test results show that the pneumatic system simulation tool can work properly and there are no leaks in the valve and air duct. The test is done by applying air pressure from the compressor. The pressure is applied gradually starting from 5 bar and increasing until it reaches 7 (bar).

Abstract: The global transition to renewable energy sources, notably solar power, significantly reduces carbon emissions compared to traditional fossil fuels. Powerwall systems have emerged as crucial components for optimizing solar energy utilization by providing reliable energy storage solutions. This research addresses the problematic issue of casing strength and durability in Powerwall applications. Employing a comprehensive methodology involving detailed 3D modeling using SolidWorks, material selection based on Aluminum 1100 for optimal thermal conductivity and corrosion resistance, and structural analysis via finite element simulations, the casing was rigorously tested. Simulation results under a 35 N load indicated a maximum stress of 12.88 MPa, yielding a safety factor of approximately 7.7, with the structure experiencing a maximum displacement of 0.105 mm at its base. These outcomes validate the robustness and suitability of the casing design for practical solar energy storage applications. However, further quantitative analysis of thermal performance and practical mounting considerations is recommended for comprehensive validation.

Abstract: The vector control strategy, focused on the use of impregnated mosquito nets, has clearly led to a clear reduction in the incidence of malaria in sub-Saharan Africa . However, the predominant curtains on the market, made from polyethylene and polyester treated with products from the pyrethroid and piperonyl butoxide family, have notable disadvantages. These textiles, in addition to generating undesirable dermatological repercussions (irritation and itching), prove to be non-biodegradable, thus contributing significantly to environmental pollution. The objective of this study was to produce an ecological knitted fabric based on Sida rhombifolia filament treated with Aloe vera gel, with a view to evaluating its effectiveness against insects. The retting method with stagnant fresh water was chosen to extract these fibers. We observe the appearance of peaks 2852 and 2050 after maceration of the fiber with aloe vera gel. The disappearance of peak 1029 which indicated the stretching of the C-O-C bonds of the cellulose shows the modification of the latter. It allows us to see that the AV gel-impregnated knitted fabric washed three times does not contain the bonds of the zone: C-H between 2700 Cm-1 and 3300 Cm-1; O-H around 3500 Cm^-1 for phenols and 2800 Cm-1 for carboxylic acids. It appears that for knitting to be treated with aloe vera gel, we must limit ourselves to 2 washes. In the remainder of this research, the behavior of Anopheles in the face of this ecological knitting will be assessed through the tests recommended by the WHO.

Abstract: The optimal geometric dimensions and dependencies for gas mask filter boxes have been determined. The geometric dimensions of the filter boxes have been defined using comfort, performance, and efficiency coefficients. These coefficients have been established through computer modeling of airflow movement within gas mask filter boxes using the SolidWorks software. The base models for creating digital copies were two types of filter boxes: cylindrical and flat, which differed in their geometric dimensions.

Abstract: This research aims to analyze the reliability of a non-invasive blood glucose detection device (glucometer) based on semi-cylindrical capacitive sensor (SCCS) with ATmega328P microcontroller. The device is designed to measure blood glucose levels non-invasively, without requiring blood sampling. This research uses SCCS to measure the dielectric constant of the finger containing glucose. This dielectric constant is then linked to blood glucose levels through a calibration equation. The calibration equation is obtained from experimental data that links the dielectric constant to blood glucose levels. The ATmega328P microcontroller is used to process signals from the SCCS and calculate blood glucose levels based on the calibration equation. The blood glucose measurement results are displayed on an I2C LCD. The reliability test of this device is carried out by comparing the measurement results with the measurement results of a standard invasive glucometer. The results of the study show that the device has an accuracy of 88.45% close to Invasive glucometer.

Abstract: The article presents a novel design solution comprising a base, a model eye, and a compressor, intended for a standard device used to calibrate eye tonometers. This device reliably generates values of intraocular pressure and related ophthalmological parameters. It is founded on the principles of objectivity and independence in metrological control, with direct traceability to the basic units of the International System of Units. The proposed design represents the next stage in the development of standard devices, addressing various metrologically unverified parameters within medical metrology, particularly values of intraocular pressure. Intraocular pressure is closely associated with glaucoma, a condition where elevated intraocular pressure leads to irreversible physiological changes in the eye. The presented technical solution establishes the foundation for robust metrological assurance of devices with measuring functions in this domain.

Abstract: Bridge design developed for centuries. Bridges were originally designed on the basis of experience, during the time a lot of additional criteria influencing the design have been involved. The primary role of the design is played by the design engineer, who is responsible for the evaluation of conditions in the location, design of the bridge structural system, of structural details and of the construction process. The opinions on the structural system changed with development of the design methods. On the other hand, the advanced numerical tools are not able to replace the creativity of the designer.

Abstract: Car body is a lightweight construction unit in the form of welded steel construction, has high strength and rigidity against dynamic loading without a fixed change in shape. In this study, the design of the car body bus frame consisted of roof, mascara, side wall, end wall, front part, and underframe. All of these components are designed using Autodesk Inventor Professional 2020 software. The frame material used is SS201. For data retrieval purposes, weight calculations are used in Autodesk Inventor. In the study, we succeeded in making the car body design according to regulations, measuring the weight of the car body, and optimizing the car body. The results showed that with a little optimization on the side wall frame, the weight of the car body bus can be reduced by 11.7% from the initial weight of 461.5 kg to 407.4 kg without changing its characteristics.

Abstract: Uprights are one of the most critical structural elements in vehicles suspension systems. A standard upright serves as a physical mounting for the wheel hub and brake components as well as links the axle to the control arms. Uprights are relatively bulky by design to withstand the significant loads they observe during vehicle braking, maneuvering, and driving on rough terrain. In automotive design, specifically, race car design, utilizing lightweight components and reducing fuel consumption are imperative. This weight reduction-based paradigm is being adopted by the car industry at large, particularly due to the shift towards automotive electrification. Consequently, this work investigates the potential for using topological optimization to reduce the bulkiness and weight of uprights without compromising their structural integrity and reliability. An upright designed for a racing car is selected in this study. Topological optimization is performed on the upright using the finite element software ANSYS. Results show that a considerably enhanced upright is obtained after 48 topological optimization iterations while maintaining a factor of safety of 2.5. The optimized upright exhibited less stress concentrations and 39% lesser weight than the original upright.

Abstract: In this paper, a numerical simulation methodology has been applied to optimize the design of extruded aluminium products. The methodology, PRO^{3 TM} , incorporates product properties, production-and material costs as well as CO₂ footprint in an optimisation procedure. This allows for multi-objective optimisation and avoids sub-optimisation of for instance properties on the expense of production costs or CO₂ emissions. The outcome that follows from this multi-objective optimisation procedure, is that the resulting profile cross section will be different when the optimisation is based solely on property considerations, than when costs and CO₂ emissions are introduced in the optimisation procedure. The present methodology requires that the main processes and operations along the aluminium process chain are represented by physics based, predictive models of various types, including material-and mechanical models, in addition to cost-, and sustainability models. A standard multi-objective optimization algorithm is used to combine the models and for automatic running through-process simulations in iterations. In this article, the PRO^{3 TM} methodology has been applied for optimisation of the profile cross section in case-studies with various user requirements. It has been demonstrated that the resulting cross section geometry depends on the specified relative importance of conflicting requirements like the desire for high productivity on the one hand, and the desire for low material costs and low CO₂ emissions on the other.