Design Of Simulation Software Research Articles

DESIGN ANTENNA MIMO 2X2 PATCH RECTANGULAR FOR WIFI 6 APPLICATIONON 5GHZ BAND

The development of wireless network technology, particularly WiFi 6 at 5GHz, offers greater reliability and data transfer capacity. Antenna design is a crucial aspect in optimizing WiFi 6 networks in complex wireless environments. The study examined a rectangular patch 2x2 MIMO Antenna for WiFi 6 at 5GHz with a focus on improving network parameters such as return loss, bandwidth, VSWR, and gain. The use of various methods and references from Balanis (2005) and Webster (2021) supports the development of antenna technology, while previous research by Ni Putu Kartika Dewi (2019) strengthens the understanding of microstrip antennas for LTE applications. The main objectives of the study were to design and simulate a rectangular patch 2x2 MIMO Antenna for WiFi 6, as well as analyze simulation data using CST Studio Suite 2019 software. This research uses hardware in the form of Acer Aspire laptops and CST Studio Suite 2019 as simulation software and antenna design. The simulation results show that this antenna is able to work in the frequency range of 4.5-5.2 GHz with a bandwidth of 55.4 MHz and return loss of -20.677981 dB, VSWR 1.2038357, and gain 3.429 dBi with omnidirectional radiation patterns. However, the addition of antenna patches has an impact on decreasing gain. This study provides an in-depth understanding of MIMO antenna design to support WiFi 6 performance in complex wireless environments.

Design and Implementation of Virtual Simulation Software to Display Information on Weather Indicators to Manage and Control Urban Policy-Making

Design and Implementation of Virtual Simulation Software to Display Information on Weather Indicators to Manage and Control Urban Policy-Making

Design, Development and Testing of Microcontroller Systems Simulator using PIC Microcontroller

The inadequacy or absence of training equipment negatively impacts student performance, achievement and employability. Attempting to address this problem, the study was conducted to design, develop, fabricate and test a microcontroller systems simulator (MSS). The MSS was composed of the mainboard and development board comprising the PIC microcontroller, microcontroller circuits and input and output devices. The MSS was designed using AutoCAD, schematic design and circuit simulation software, and printed circuit board auto-routing software. A computerized cutting machine, laser laminator and ink printer were also used in the fabrication of the MSS boards. Test results showed that 12 and 24 VDC voltage readings were normal, sensors were working with the indicated specifications, and the MSS could perform automatic switching simulations. It was concluded that the MSS can effectively demonstrate microcontroller experiments and switching applications and it conformed to the required voltage and current ratings, electronics and electrical safety standards. It was also found that it is technically feasible to develop a microcontroller simulator utilizing commercially and locally available materials and spare parts.

The Structural Performance of a Novel Double‐Stacked Heterogeneous Gate Heterojunction Tunneling Field‐Effect Transistor

In this work, an original Si/SiGe heterojunction tunneling field‐effect transistor which has a double‐stacked heterogeneous oxide gate (HfO2/Al2O3) structure (DSG–HJ–TFET) is designed and investigated by Sentaurus technology computer aided design (TCAD) simulation software. To ensure good interface quality, a stacked oxide gate dielectric of Al2O3 and HfO2 is proposed. The on‐state current (Ion) is increased though improving the carrier mobility degradation caused by the poor quality of interface between the high‐κ dielectric and semiconductor. Moreover, a heterojunction with SiGe (source)/Si (channel) and pocket layer which is inserted between the source region and the channel is adopted to reduce the tunneling barrier and improve the Ion. Therefore, the higher Ion is obtained by the proposed DSG–HJ–TFET. In the simulation results, it is shown that Ion of DSG–HJ–TFET is increased by three orders of magnitude compared with that of the conventional high‐κ gate dielectric TFET structure. In addition, the off‐state current (Ioff) of 4.91 × 10−11 μA μm−1, the minimum subthreshold swing of 14 mV dec−1, the Ion/Ioff ratio of 1.13 × 1012, transconductance of 260 μS μm−1, fT of 49.8 GHz, and gain bandwidth product (GBW) of 7.2 GHz are obtained. The propose DSG–HJ–TFET is favored in ultralow‐power applications for the rather good performance.

Design of Visualization Simulation Software for Fire Planning Based on Unity 3D Technology

How to evaluate the effective firepower intensity generated by ammunition in war is an important basis for tactical decision-making. In order to calculate the firepower kill range formed by the combined action of multiple high explosive bombs, this paper uses digital simulation methods to establish a firepower planning model for multiple high explosive bombs based on the hit rate model and power model of the ammunition. A visual simulation software for explosive bomb firepower planning based on C + + programming language and Unity 3D engine is designed to support rapid calculation and visual display of firepower planning results. The results show that the visual simulation software for fire plan can effectively calculate the distribution pattern and fire damage of ammunition, dynamically visualize the entire terminal damage process, evaluate the effective fire distribution results, and lay a foundation for the design of warheads and the efficient use of ammunition.

Design of Simulation Software for Visualization of Munition Anti-Air Effectiveness

In order to realize the simulation of the damage effectiveness of air defense projectiles against air targets, this paper uses the C++ programming language to complete the development of ammunition air damage simulation model by constructing the ammunition combat model and target vulnerability digital model, and designs the visualization simulation software of ammunition air damage effectiveness based on the Unity 3D engine. The results show that the visualization and simulation software of ammunition damage effectiveness against air targets can calculate the damage effect of ammunition on air and visualize the results of missile rendezvous, combat guidance and air target damage, which provides reference for the design of air defense ammunition introduction.

Weight Reduction of C-Drone Body Structure

UTHM has successfully developed a high payload cargo drone, namely the C-Drone, with a weight of over 400 kg. Although this drone has successfully passed the hovering test, it is believed that the weight of the drone can be reduced or optimized. The purpose of this research work is to reduce the weight of the C-Drone's main body structure. Therefore, tensile tests on Aluminium 6061 are reviewed to obtain the actual mechanical properties of the current C-Drone material. This study will run a structural analysis of the current C-Drone design and run topology optimisation on the current C-Drone structure for weight reduction using the software SolidWorks. To achieve the objectives of this project, the topology optimisation focuses on the main body of the C-Drone structure. Before the optimisation can be done, the input material properties need to be defined beforehand. The mechanical properties of the Aluminium 6061 were obtained from experimental data that involved the tensile and flexural tests of the material. These values are inserted into the simulation software, SolidWorks, and structural analysis for the current design. From this analysis, the critical part or area caused by the loads and internal stress was determined. From the result obtained, in order to ensure the weight is reduced without reducing the structural rigidity, the area is excluded from part removal for the topology optimisation. The topology process runs the analysis again if the results from the optimisation show the structure is unable to withstand the total load. The best results have been obtained from the series of simulations, and they show the suggestion for the most suitable modification strategy. It also shows the comparison of the current design of the body structure of the C-Drone with the software SolidWorks. The result of the stress, deformation, displacement, and safety factors of the construction is within acceptable limits. From this study, it can be concluded that the current design of body structure C-Drone is overdesigned because when the support of the current body structure C-Drone has been discarded, the result is still in the range of yield strength.

Comprehensive Research on the Near-Zero Energy Consumption of an Office Building in Hefei Based on a Photovoltaic Curtain Wall

The near-zero energy design of a building is linked to the regional climate in which the building is located. On the basis of studying the cavity size and ground height of a photovoltaic curtain wall, the power generation efficiency of the photovoltaic curtain wall under different ground heights is compared in this paper. According to the “Technical Standard for Near-Zero Energy Buildings”, the personnel and lighting of a 12-metre office building in Hefei were parametrically arranged and three design schemes for near-zero energy buildings were proposed. The energy consumption of the benchmark building and the design energy consumption of each scheme were calculated by using the energy consumption simulation software Design Builder V 7.0.0.096; the feasibility of realizing the near-zero energy consumption building by using each scheme was checked. The results show that when the cavity width of the photovoltaic curtain wall of the office building is 70 mm, the cavity heat transfer coefficient is the lowest and the heat insulation of the building is the best. When the height from the ground is 0.7 m, the power generation efficiency of the photovoltaic curtain wall reaches a maximum of 18.39% and the south façade of the building is more suitable for the layout and installation of the photovoltaic curtain wall. The single-façade photovoltaic curtain wall should be combined with a high-efficiency air conditioning system and lighting system; the installation of a photovoltaic rooftop at the same time can meet the design requirements of near-zero energy buildings in hot-summer and cold-winter areas. This paper provides some guidance for exploring the design of near-zero energy office buildings, which is of practical significance.

Modified photodiode equivalent circuit model considering coplanar waveguide electrodes

Accurate equivalent circuit models can assist in better analyzing the performance of photodetectors. This study proposes a modified photodiode (PD) equivalent circuit model that considers coplanar waveguide (CPW) electrodes. First, the CPW electrodes of the PD are analyzed using high-frequency structure simulation software and advanced design simulation software. Skin effect occurs inside the electrode at high frequencies, increasing the PD loss and reducing the bandwidth. Subsequently, the extraction formula for the proposed model is derived, and the proposed model is compared with two conventional CPW electrode models. The proposed model effectively eliminates the frequency-dependency issue in the parameter extraction process of previous models, thereby demonstrating its accuracy. Furthermore, simulation and experimental results validate the reliability of the proposed model. Among the entire frequency band, the proposed model has good stability and a low error rate and can achieve excellent fitting with the measured results. Compared with previous studies, the average error rate is reduced by over 10%, demonstrating a significant improvement. Finally, the influence of the skin effect and high-impedance transmission lines on PD performance is analyzed and a viable approach to improve the bandwidth of PDs is proposed. The proposed model provides a viable approach to model and optimize CPW structures and is significant for the design of high-performance PDs.

A Study on Rocker-Bogie Mechanism for a Planetary Rover Prototype

Abstract: In light of the notable rocker-bogie mechanism, this paper shows an ideal plan of a rocker-bogie suspension framework so as to ensure high mobile steadiness as well as excellent versatility of a prototype rover vehicle while traversing through rough terrains. It is essentially a suspension arrangement utilized in mechanical automated vehicles utilized explicitly for space investigation. The rocker-bogie suspension-based rovers have been effectively presented for the Mars Pathfinder and Mars Exploration Rover (MER) and Mars Science Laboratory (MSL) missions led by zenith space investigation laboratories all through the world. The proposed suspension framework is presently the most supported structure for each space investigation organization. It is basically a mechanism which comprises of two arms with wheel mounted to each and the two arms are associated through a versatile joint. The current development in design has been studied as well as a different approach towards designing the basic structure of suspension has been done. It has been further verified using various static and dynamic load calculations, solid modeling computer aided design software and simulation software for analysis and testing

The impact of PV panels on cooling and heating loads of residential buildings in a humid subtropical climate zone

Installing photovoltaic (PV) panels on the roofs of homes may reduce dependence on the electrical grid and lead to net-zero energy production. Climate patterns and a building’s structural system can significantly affect how much energy the structure uses. This investigation is aimed to focus on the shading effect of solar panels on the uninsulated roof of a residential building to investigate the output of combining architectural buildings with renewable energy systems. The PV system was modelled as a shading device using building simulation software (Design Builder) to calculate the monthly reduction and increase in heating and cooling loads for the rooftop in a humid subtropical climate zone. The results showed that the cooling loads were decreased by 290 kWh/year (almost 5%) and heating by almost 30 kWh/year. The findings showed the importance of renewable energy in tackling climate change and reducing the housing energy requirements for sustainable development.

Improvement in the Performance of P-Type Tunnel Oxide Passivated Contact Solar Cell With Selective Tunneling Junctions Underneath the Contacts on Front Side

Industrial silicon solar cells are now moving further from passivated emitter and rear contact (PERC) toward Tunnel Oxide Passivated contact (TOPCon) technology. The efficiency of the PERC solar cell is improved by TOPCon technology, in which the rear side is fully passivated by an oxide/poly-Si tunneling junction. The performance of a TOPCon solar cell may further be improved by the incorporation of selective tunneling junctions underneath the front contacts. Some fabrications have been reported on a similar structure for an n-type Si substrate but they have not achieved the expected results. Also, a detailed study has not been done yet. Using 3-D sentaurus technology computer aided design (TCAD) simulation software, a detailed analysis has been done on the modified structure through the optimization of the tunnel oxides, the interfaces, the n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">++</sup> poly-Si layer, the selective (SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">++</sup> -poly-Si) tunneling junctions underneath the front contacts, etc., which has not been done earlier. It is seen that a thick n <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">++</sup> poly-Si layer causes parasitic absorption of light, whereas a very thin poly-Si layer cannot provide sufficient field for tunneling of carriers. A thicker tunnel oxide produces a high series resistance, whereas a very thin tunnel oxide cannot restrict the minority carriers to reach to the contacts. Therefore, an optimization is required and the optimization is done based on a fabricated bifacial p-TOPCon solar cell reported in the literature with an efficiency of 21.2% and bulk lifetime of 200 μs. After performing all the modifications in the fabricated reference cell and optimizing different parameters, the efficiency is improved by 3.5% in absolute. The efficiency is further improved to 25.4% with the bulk lifetime of 1 ms.

Exploration of Multi-mode Mixed Teaching of Mechanical and Electronic Courses

Aiming at the difficulty of electronic courses and the weak electronic foundation of mechanical students. In order to change the current teaching situation, improve students' interest in learning, and improve the teaching effect. On the basis of years of accumulated teaching, and referring to the current development of relevant theories and implementation methods. A hybrid teaching method using online teaching + offline classroom + simulation exercise + practical design + course cases and other modes is proposed. Make full use of online and offline excellent teaching resources, and supplement the recording of course design practice video. For each course, a curriculum theory teaching website and a design practice website were set up to help students preview before class and practice after class. 20-40 cases are designed for each course to help students apply simulation software for circuit design and programming exercises. At the same time, real experiments are used to help students understand the real circuit design. Through the case teaching and course design practice and other means, multiple links, strengthen the students' understanding ability and practical ability. The teaching practice in the past three years has proved that this method can stimulate students' enthusiasm for learning and improve the teaching effect. It lays the foundation for training new mechanical and electrical innovative talents.

CAD 3D Simulation Software Design based on Computer Aided Design

Computer-Aided Design and Applications is an international journal on the applications of CAD and CAM. It publishes papers in the general domain of CAD plus in emerging fields like bio-CAD, nano-CAD, soft-CAD, garment-CAD, PLM, PDM, CAD data mining, CAD and the internet, CAD education, genetic algorithms and CAD engines. The journal is aimed at all developers and users of CAD technology to ptovide CAD solutions for various stages of design and manufacturing. The journal publishes all about Computer-Aided Design and Computer-Aided technologies.

A Symmetrical Terahertz Triple-Band Metamaterial Absorber Using a Four-Capacitance Loaded Complementary Circular Split Ring Resonator and an Ultra-Thin ZnSe Substrate

In this research work, a symmetrical four-capacitance loaded complementary circular split ring resonator is proposed, which uses an ultra-thin Zinc Selenide (ZnSe) substrate to realize a low-profile triple-band metamaterial (MTM) perfect absorber for application in the terahertz (THz) frequency range. The electromagnetic properties of the proposed structure were calculated and investigated using the Finite Integration Technique (FIT). The proposed structure exhibited three highly absorptive (nearly perfect) peaks at the resonance frequencies of 15.68 THz, 37.48 THz, and 39.55 THz. Furthermore, the absorber was found to be insensitive to the polarization and incident wave angles, due to its symmetrical design. The effects of the conductor type, substrate thickness, unit cell dimension, resonator gap, and substrate type on the reflection and absorption spectra were investigated. To validate the numerical results, the proposed design was analyzed using High-Frequency Simulation Software (HFSS) and Advanced Design System (ADS). The surface current, electric field, and magnetic field distributions at the three-resonance frequency were analyzed. It was concluded that the overall performance of the proposed MTM structure was superior compared to those reported in the literature. The proposed design could be a good candidate for application in stealth technology, imaging, and thermal energy harvesting.

Virtual interaction and manipulation control of a hexacopter through hand gesture recognition from a data glove

AbstractThe purpose of this study is to realize virtual interaction and manipulation control of a hexacopter based on hand gesture recognition from a designed data glove, to provide an intuitive and visual real-time simulation system for flight control algorithm verification and external control equipment testing. First, the hand gesture recognition from a designed data glove is studied, which can recognize different actions, such as mobile ready, grab, loosen, landing, take-off, and hover. Then, the design of virtual simulation system for hexacopter capture is completed, with the model design of hexacopter and manipulator, and the simulation software design with $CoppeliaSim$ . Finally, virtual simulation experiment of hexacopter grasping and virtual flight control experiment based on data glove are tested, respectively, and quantitatively described. The overall recognition rate is 84.3%, indicating that the data glove produced has the ability to recognize gestures, but its recognition performance is not superior. In gesture recognition, the recognition rate of static gestures is relatively higher than that of dynamic gestures. Among the static gestures, the hover gesture has the highest recognition rate. The average correct rate of static gestures can reach 94%. The lowest recognition rate of dynamic gestures is upward movement, and the average recognition rate of dynamic gestures is 76.1%. The research can be used to remotely operate hexacopter using a data glove in the future and improve the control performance through virtual interaction and manipulation simulation before actual application.

Banker Algorithm Simulation Software

Banker's algorithm is an algorithm that models a bank in a small town dealing with a set of customers. This banker algorithm is used to deal with queuing problems in banking. In this case, one of them is how to simulate queues in banking. In this study, the design and manufacture of simulation software is used to help simulate whether a system is in a safe state or an unsafe state, in a safe condition the process is continued but if the process is unsafe the process is delayed until the system is in a safe state. The result of this research is a banker algorithm simulation software that models a banker who is dealing with a group of customers in a bank.

Design, synthesis and bioactivity evaluation of thiazolidinedione derivatives as partial agonists targeting PPARγ

Thiazolidinedione (TZD) is a novel peroxides proliferator activated receptor γ (PPARγ) agonist with many side effects. Herein, we developed a series of novel TZD analogues as partial agonists targeting PPARγ. The study of anti-hyperglycemic activity and anti-inflammatory activity enabled us to identify a novel compound, 4 g, which quickly recover the blood glucose of mice at the concentration of 100 mg/kg, and show similar anti-inflammatory activity to ibuprofen at the concentration of 20 mg/kg. The competitive binding assay confirmed direct binding of 4 g to the LBD of PPARγ with IC50 being 1790 nM, and dose-dependently increased the transcriptional activity of PPARγ. Besides, through computer-aided drug design software simulation docking, it was found that compound 4 g showed the best binding ability to target protein PPARγ. Furthermore, because of the introduction of benzene containing group at N3 position, the stability of H12 in the active pocket is reduced and the stability of H3 and β-fold is increased, showing the characteristics of some PPARγ agonists, based on the docking model analysis. Together, these results suggest that 4 g is a promising PPARγ agonist that deserves further investigation.

A Fast Analytical Method for the Dynamic Energy Simulation of Energy Piles With Short Time Resolution

Abstract This paper proposes an analytical method for the dynamic thermal simulation of energy piles with a short time resolution (e.g., tens of minutes) as an alternative to numerical approaches, which require relevant computational resources. The discussion is tailored to the implementation of analytical models in dynamic energy simulation software for buildings and HVAC systems. The main modeling challenges consist of accounting for the pile thermal capacity, configuration of pipes, and time-varying inlet temperature and flow rate values. The heat transfer process occurs in three characteristic periods, each of them characterized by a 2D or 3D geometry. The first period concerns the evolution of the fluid temperature and heat transfer over the length of the pipes, the second period concerns the thermal diffusion within the heat capacity of the foundation, and the third period is driven by pile geometry and ground source characteristics. For short time resolution analyses, we proposed a general linear set of equations based on the ε-NTU theory for heat exchangers, the infinite composite-medium line source solution, and the finite line source for the ground source. The proposed method is compared with a full transient 3D numerical simulation. The maximum deviation in terms of return temperature to the heat pump is 0.2 K. The general dimensionless form, the short time resolution, and the limited computational time makes the method suitable for building simulation software and optimization codes for thermal analysis and energy pile design.

Design of Dynamic Simulation Software of Water Flooding Based on Unified Modeling Language

The dynamic simulation software of water flooding is of great significance for observing the exploitation of crude oil and understanding the distribution of microscopic remaining oil in the underground reservoirs. Based on Unified Modeling Language (UML), the design of the dynamic simulation software of water flooding is completed. First, based on the results of demand analysis, the function module diagram of the software is established; then the use case diagram is designed to clarify the goals that the software needs to achieve; finally, the class diagram and the sequence diagram of the software are designed, which provides the basis for the specific coding implementation. The design of the dynamic simulation software of water flooding based on UML enriches and develops the theory, technology and method of exploitation geology, and promotes the further application of advanced computer technology in the petroleum industry.