Design Of Simulation System Research Articles

Estimating underground mine ventilation friction factors from low density 3D data acquired by a moving LiDAR

Ventilation system analysis for underground mines has remained mostly unchanged since the Atkinson method was made popular by McElroy in 1935. Data available to ventilation technicians and engineers is typically limited to the quantity of air moving through any given heading. Because computer-aided modelling, simulation, and ventilation system design tools have improved, it is now important to ensure that developed models have the most accurate information possible. This paper presents a new technique for estimating underground drift friction factors that works by processing 3D point cloud data obtained by using a mobile LiDAR. Presented are field results that compare the proposed approach with previously published algorithms, as well as with manually acquired measurements.

Design of Traffic Flow Simulation System to Minimize Intersection Waiting Time

This paper designs a traffic simulation system for minimizing intersection waiting time. We use SUMO simulator which is widely used as a traffic flow simulation tool for traffic flow simulation. Using the SUMO simulator to set the route from the source to the destination and measuring the time required when using the existing intersection signal system. Through this simulation, we want to measure how much the proposed system can minimize the waiting time. In order to minimize the intersection waiting time, it is assumed that there is a loop sensor that can recognize whether there is a waiting vehicle in each direction of the intersection. Using this information, a signal lamp is used as a waiting signal in the case of a direction in which there is no waiting vehicle, and a driving signal is given in the case of a waiting vehicle or an entering vehicle. In this paper, we try to reduce the time required for vehicles to arrive at their destination by making the traffic flow smoothly without any expense such as road expansion through the limited system.

A Mobile Manoeuvring Simulation System for Design, Verification and Validation of Marine Automation Systems

Applications for SIL and HIL testing in design, verification, and validation of marine systems are expected to increase. With this in view the concept for a mobile simulation system is presented, which aims at enhancing factory and on board simulation based testing. A modular network-based system architecture is proposed providing: real-time process simulation, hardware interfaces, test tools, a mobile bridge console, and 3D-visualization. For the purpose of flexible solutions a modular and scalable approach to simulating ship motion in six degrees of freedom is incorporated. Finally preliminary modelling and simulation results from the current design stage are presented.

Framework for modeling operational uncertainty to optimize offsite production scheduling of precast components

Abstract Current precast production scheduling methodologies have limited applicability in practice due to the neglect of real-world production circumstances. To improve, a two-hierarchy simulation-GA hybrid model for precast production (TSGH_PP) is developed to (1) specialize the operations of precast production according to their characteristics, (2) incorporate the uncertainty in processing time in practice, and (3) model the process-waiting time on the flow of work based on the genetic algorithm and discrete event simulation. In the proposed model, the trade-off can be achieved between the conflicting goals of the on-time delivery of precast components and minimum production cost, and the production resources configuration is optimized to cut down resource waste. Finally, a real case study is conducted to test the validity of TSGH_PP approach. The developed model fills the gap in simulation system design and methodology for precast production, and increases the applicability of precast production scheduling methods in real construction projects.

Simulating storage part of application with Simgrid

Design of a file system simulation and visualization system, using simgrid API and visualization techniques to help users understanding and improving the file system portion of their application. The core of the simulator is the API provided by simgrid, cluefs tracks and catches the procedure of the I/O operation. Run the simulator simulating this application to generate the output visualization file, which can visualize the I/O action proportion and time series. Users can also change the parameters in the configuration file to change the parameters of the storage system such as reading and writing bandwidth, users can also adjust the storage strategy, test the performance, getting reference to be much easier to optimize the storage system. We have tested all the aspects of the simulator, the results suggest that the simulator performance can be believable.

Design of Multi-tasking Cooperative Path Planning Simulation System with Multi-algorithms Fusion

Design of Multi-tasking Cooperative Path Planning Simulation System with Multi-algorithms Fusion

The effect of asymmetrical electrode form after negative bias illuminated stress in amorphous IGZO thin film transistors

This paper investigates the degradation behavior of InGaZnO thin film transistors (TFTs) under negative bias illumination stress (NBIS). TFT devices with two different source and drain layouts were exanimated: one having a parallel format electrode and the other with UI format electrode. UI means that source/drain electrodes shapes is defined as a forked-shaped structure. The I-V curve of the parallel electrode exhibited a symmetric degradation under forward and reverse sweeping in the saturation region after 1000 s NBIS. In contrast, the I-V curve of the UI electrode structure under similar conditions was asymmetric. The UI electrode structure also shows a stretch-out phenomenon in its C-V measurement. Finally, this work utilizes the ISE-Technology Computer Aided Design (ISE-TCAD) system simulations, which simulate the electron field and IV curves, to analyze the mechanisms dominating the parallel and UI device degradation behaviors.

A 280-GHz InP DHBT Receiver Detector Containing a Differential Preamplifier

A power detector integrated with a preamplifier is fabricated using a 250-nm InP double-heterojunction bipolar transistor technology for 280-GHz operation. The input RF signal to the detector is modulated at 20 kHz to decouple the output dc voltage from 1/f noise. The integrated receiver detector consists of a two-way balun, a differential preamplifier, a power detector. Breakout circuits of a standalone power detector and a test amplifier have been independently characterized. The test amplifier shows a gain of 18.1 dB and noise figure of 14 dB. The responsivity and noise equivalent power of the detector improve from 4.5 to 350 kV/W and from 10 to 0.13 pW/Hz0.5, respectively, at 280 GHz, with the addition of the preamplifier. The performance enhancements due to the preamplifier are in close agreement with the results predicted by advanced design system simulations.

Research on Multi-scale Product Design and Lifecycle Simulation System

It is important for product designer to get the forecast of the performance and the influence on the environment of the designing product by computer simulation quickly and easily. Multi-scale product design and lifecycle simulation (MPDLS) system is proposed as a new type of CAD system for the future product designer. MPDLS system is consists of multi-scale product design sub-system and product lifecycle simulation sub-system. A prototype system of MPDLS system is made using MPI-2.

Multi-scale Product Design and Lifecycle Simulation System

It is important for product and material designers to forecast the performance and nature of the designing product early in the design process by computer simulation. The multi-scale product design and lifecycle simulation (MPDLS) system proposed here is a kind of multi-scale CAD system. The MPDLS system is designed to design the product or material across the micro-scale to the macro-scale continuously. Also, the MPDLS system includes product lifecycle simulation to estimates the ecological and economic efficiencies of the product. A MPDLS system prototype has been implemented using MPI-2.

Design of Physical Simulation System for Satellite Flexible Rotating Panels Based on Flotation

挠性附件运动时产生的弹性振动是影响空间飞行器指向精度和控制性能的主要原因.因此，在地面对控制系统抑制振动的性能进行验证具有重要意义.由于太阳帆板低频且长度较大，在地面构建大范围运动的空间微重力环境，耗资及难度极大.本文提出一种基于等效主轴惯量与挠性频率的卫星挠性旋转帆板挠性模拟器，基于气浮法设计了低摩擦与微重力环境的物理仿真系统，并建立了模拟器的动力学模型，等效模拟了卫星挠性旋转帆板的振动特性，降低了卫星挠性旋转帆板地面微重力运动环境模拟的难度，实现了对其控制算法抑制振动性能的有效及高经济性测试.仿真结果表明，模拟器可以通过简单操作实现参数的平滑改变以模拟不同参数及结构的卫星挠性旋转帆板，且具有与真实太阳帆板一致的振动特性，满足测试要求.

Research on the Construction of Virtual Reality Simulation System for Psychological Stress Training

Due to the lack of realistic training environment in psychological stress training problems, virtual reality (VR) technology is introduced into the psychological stress training. This paper summarizes the five psychological stress training courses for VR technology, carries on the demand analysis, structure design and function module design of the virtual reality simulation system for psychological stress training (VRSSPST), researches on the training organization, and enriches the psychological training method.

マルチスケール製品設計ライフサイクルシミュレーション・システムの設計と開発

マルチスケール製品設計ライフサイクルシミュレーション・システムの設計と開発

Design and Realization of Digital Modulator BPSK, QPSK and 16-QAM on FPGA

Innovations in the field of wireless communication are growing very rapidly in line with the behavior of modern societies that have high mobility, need of the flexible services, easy access, and high speed data transfer to facilitate any activities of its users. The needs of every user of any variety are more than just voice, video, data transfer, up to a demanding streaming multimedia capabilities and reliability of the communication system used. One of the factors that affect the quality and speed of data transfer in wireless communications is modulation. The development of technological modulation allows data transfer rate to become faster, more resistant to noise, and have high security (encryption) in order to secure data sent over the lead.
 The implementation of digital modulator PSK (Phase Shift Keying Modulation) and QAM (Quadrature Amplitude Modulation) on FPGA is designed to simplify the design of a hardware by representing the input which is prepared by using the VHDL programming language. The input will be programmed by logic gates contained in the FPGA into a circuit that functions as a digital modulator. This device can map the input bits into a modulator output that has been mapped in accordance with the coordinates of the constellation.
 The expected results of the implementation are three types of digital modulator, namely: BPSK, QPSK and 16-QAM to be implemented on FPGA Xilinx Spartan-6 XC6SLX45 CSG324C; modulation type to be used can be selected by entering input on the programs implemented in the FPGA. In the design used input from laptop devices with UART interface and data types for input is ASCII 8 bit for later analysis simulation results modulation of the input to each modulator using Modelsim for simulation design and Chipscope for simulation system design implemented in the FPGA.

Theoretical and experimental development of a high-conversion-efficiency rectifier at X-band

Voltage doubler rectifiers are usually applied to systems with high voltage and low current requirement. An X band voltage doubler rectifier has been developed with 72% conversion efficiency. To the best of our knowledge, the obtained rectifying efficiency is the maximum reported to date at X band with Schottky diodes. The working characteristics of the diodes in the voltage doubler rectifier are analyzed in detail. Closed-form equations of diode input impedance and rectifying efficiency are presented and validated using Advanced Design System simulations. The matching network design of the proposed rectifier is based on the closed-form equations. The preliminary rectifying efficiency is predicted by the closed-form equations as well. Measured and simulated results are in good agreement.

Design of ultra‐low noise, wideband low‐noise amplifier for highly survival radar receiver

High electron mobility transistors (HEMTs) play a crucial role in microwave low-noise amplifier (LNA) and are used in radar receiver, software defined radio and digital radio frequency. A novel technique is used to design and fabricate a high-performance wideband LNA for 5.4–5.9 GHz based on fully stabilised InGaAs pseudo-morphic HEMT (pHEMT) 0.15 µm technology. With the Agilent Advanced Design System simulation tool, a C-band (5.4–5.9 GHz) two-stage LNA using pHEMT based on monolithic microwave integrated circuit (MMIC) technology has been designed: noise figure <1 dB, power gain of 18 dB, output 1 dB compression >13 dBm and OIP3 >24 dBm, lower value of input/output return loss reflects the accuracy of impedance matching network at input and output sides of amplifier, full band unconditional stability. In this study, it is shown that the InGaAs pHEMT has the ability to handle high power to make it the perfect technology candidate for highly survival radar receiver component and survival up to 37 dBm input power level is demonstrated. The circuit based in the proposed technology shows comparable low noise figure, decent gain, with high dynamic range and high survivability. Finally, the simulation results and fabricated device results are in good agreement and superior than the earlier reported design.

System Design for Direct RF-to-Digital &lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;$\Delta\Sigma$&lt;/tex-math&gt; &lt;/inline-formula&gt; Receiver

The Direct RF-to-Digital $\Delta\Sigma$ receiver has emerged as an attractive solution for multi-band multi-standard wireless applications. This architecture is a direct RF to baseband digitizer with RF feedback from baseband to RF stages. The presence of the RF blocks such as the low noise amplifier and down-conversion mixer inside the loop filter significantly relaxes their linearity requirements and also improves the noise transfer function of the loop filter. However, the RF feedback poses several challenges, especially making the design methodology more complex. In contrast to classical receiver architectures, the blocks of the Direct RF-to-Digital $\Delta\Sigma$ receiver cannot be designed, analyzed, and simulated independently. Besides, conventional design methodologies for $\Delta\Sigma$ Modulators cannot be applied for this kind of receiver due to the presence of the RF blocks and the RF feedback inside the loop. This paper presents a new design methodology suited for this family of receivers. The proposed methodology covers simulation approaches, system design, and non-ideality impacts on the receiver. A design example of a multi-band multi-standard receiver for GSM/WCDMA/LTE is considered throughout the paper to demonstrate this design methodology.

Design of Visual Simulation and Analysis System of Marine Protected Areas Disasters

Design of Visual Simulation and Analysis System of Marine Protected Areas Disasters

Design, Research and Practical Implementation of the Laser Shooting Simulation System for 5.56 mm G-36, 7.62 mm FN MAG and 84 mm carl Gustaf

This paper is based on the work presented at the 10th International Armament Conference on „Scientific Aspects of Armament and Safety Technology”, Ryn, Poland, September 15-18, 2014.

Application of Automatic Choreography Software Based on Virtual Technology in the Gymnastics Teaching

this research designed simulation system of gymnastics automatic choreography software. To successfully design the gymnastics movements, experiment adopted solutions based on key frame spline interpolation calculation which managed to solve the problem of location deviation; quaternion interpolation algorithm was adopted to solve the rotation problem of the subject and the body, which made the modified action by computer auxiliary choreography system completely returned to virtual figure animation. In addition, for coordination of dance and audio, this paper established movement fragments library based on sentiment types, proposed viable approach of synchronized audio and video model. Teaching experience was conducted in the gymnastics course of physical education at the University and achieved good results.