Development Of Simulation System Research Articles

Development of Virtual Pipe Simulation System for Inspection Robot Design

AbstractPipe inspection robots have been developed to reduce the cost and time required for gas pipe inspection. However, these robots have been developed using a scrap and build method and are not used in practice. In this paper, we propose a method of virtual pipe inspection simulation to clarify the parameters that are important in increasing the robot's ease of use. This paper presents the results obtained by a feasibility study with regard to pipe simulation. We developed a virtual pipe by simulating eight actual turns of an external gas pipe, and a robot equipped with camera at the tip. In the experiments, three individuals working in the field of gas inspection carried out the operation. We obtained questionnaire, time, and brain activity data. The results revealed various important points that must be considered in practical simulation and robot design. In conclusion, the virtual pipe simulation can be useful in developing the design of a pipe inspection robot.

Development and Application of Fuzzy Multiple Model Simulation System for Nuclear Reactor Core

Abstract: The reactor core model for a single power level can not accurately represent the dynamic characteristics of the core under different power conditions. In order to solve the problem, the triangle membership function is used to weigh five local models at different power levels, and the fuzzy multi-model simulation system is developed. Taking the PWR core as an example, the disturbance simulation of the reactivity and the coolant inlet temperature are carried out. The results show that the fuzzy multi-model simulation system can be applied to the simulation of different core power levels.

Human behavior modeling for simulating evacuation of buildings during emergencies

Every year, a considerably large number of disasters occur as a result of natural events or human faults. In order to decrease the damage and casualties associated with each disaster, it is crucial to get prepared for these kind of situations. Indeed, emergency evacuation is a crucial part of this preparation. Researchers have been working on creating evacuation simulation systems over the past few decades. They are trying to model the environment, human physiology and psychology as realistic as possible to make the analysis more accurate. However, there is yet no comprehensive system which well cover the emerging situations and guarantees the avoidance of causalities, environmental and economic damage. In this paper, we propose an approach which combines a multi-agent model with fuzzy logic to smoothly and successfully handle multiple features of each individual to simulate common human and group behavior during safety egress. The developed simulation system considers situations where a crowd is blocked inside a building or a zone during a disaster. Agents capture various aspects related to humans who may be present in such a region. Each agent possesses different features to realistically simulate a human by encapsulating the psychology, sociology, mood, reaction, etc. Integrating fuzziness in the model allows for more natural capturing of human behavior during the evacuation process. Different scenarios have been tried in the conducted experiments. The outcome revealed the importance of various characteristics of the zone to be evacuated and how they could positively affect the safeness of the evacuation plans. For instance, increasing the width of an exit up to a certain limit may be very beneficial in the process based on the density of the crowd to be evacuated. Actually, the reported simulation results demonstrate the applicability and effectiveness of the proposed approach.

Changes in left ventricular shape and morphology in the presence of heart failure: a four-dimensional quantitative and qualitative analysis.

The presence and progression of heart failure (HF) are associated with cardiac remodelling, defined as cellular, molecular and interstitial changes which occur after injury and manifest as changes in left ventricular (LV) size, mass, geometry and function. This research study was designed to investigate the changes to LV morphology and shape which occur in the presence of heart failure using three-dimensional (3D) modelling and analysis of cardiac-gated CT scans from both healthy individuals and patients classified with HF. A number of quantitative and qualitative strategies were applied to cardiac CT scans of HF patients and healthy controls (n = 7) in order to analyse changes to LV size, shape and structure and to examine LV remodelling in the different classes of HF. Three-dimensional wireframe representations of endocardial and epicardial borders were created, three-dimensional computer stereolithography models of the inner LV cavity and myocardial wall segments were generated and three-dimensionally printed and a number of clinical LV dimension and shape indices were measured. All data were analysed using one-way ANOVA with post hoc Tukey method for multiple comparisons for significant variables. Results of most significance included abnormalities in LV mass and end-systolic dimensions and significantly increased septal wall thickness among mid-range ejection fraction cases. Also of importance were significant increases in both dimension-based and volumetric sphericity index measures in all HF cases. Three-dimensional printed models provided qualitative information as to changes in inner LV cavity and myocardial wall morphology across the cardiac cycle for healthy and HF cases and validated quantitative findings. Findings from this study can successfully be applied to motivate the research and development of new HF treatment strategies and devices as well as for the development of a realistic cardiac simulator system.

The Design and Development of Simulation System for Broad Band Wireless Communication

Based on the analysis of the broad band wireless communication, we design a wireless terrain network with some different subnet of satellite, microwave, LTE, and so on. OPNET provides a virtual network environment, through the modeling of the network. We give the simulation flow of the wireless communication. It designs the station node and satellite node, and builds a simulation system for the broad band wireless communication by OPNET. According the wireless communication topology, it realizes the network simulation system with six zone subnets which contain six single users and two communication vehicles. It contains the communication satellites which use the transparent transponders. The simulation system can display the dynamic route by the simulation system. It also can analyze the performance and efficiency of the wireless system with the parameters, such as: throughput, delay, processing delay, Packet Loss Ratio. It can use “Failure Recovery” module in the simulation system and set the parameters and analyze the communication system influence.

Development and Application of Cast Steel Numerical Simulation System for Heat Treatment

A numerical simulation system for heat treatment of cast steel was developed using C++ environment, which has been integrated into the InteCAST platform as a new feature module. The system mainly includes heat treatment process inquiry module, initialization and property parameter setting module, automatic import and display module of time-temperature-transformation (TTT) and continuous cooling transformation (CCT) curves, heat treatment process design module, organization, performance and stress–strain prediction module. This paper introduces the mathematical model and numerical solution algorithm in the process of numerical simulation of the heat treatment organization, performance and stress–strain as well as the interface operation process and application examples of the system.

Development of hydrogen behavior simulation system for safety management

Development of hydrogen behavior simulation system for safety management

多波段LED太阳模拟器及其测试系统的研制

多波段LED太阳模拟器及其测试系统的研制

Development of simulation system for evaluating productivity and energy consumption in production lines including injection molding machine

Development of simulation system for evaluating productivity and energy consumption in production lines including injection molding machine

Representing crowds using a multi‐agent model – Development of the SimTread pedestrian simulation system

AbstractSimTread was developed as a pedestrian simulation system following a straightforward, highly user‐definable pedestrian and spatial model. Unlike network and mesh models, this pedestrian model is a multi‐agent system in which an individual pedestrian is modeled as an agent. The spatial model is based on actual coordinates, which enables the direct representation of plans using the SimTread model. The crowd characteristics represented by this system were evaluated through test cases by measuring the flow rate, which is a primary indicator of crowd evaluation. The major results are as follows: (a) SimTread demonstrated a reasonable crowd‐behavior simulation in a simple plan that was equivalent to network models. Along with the added benefits of operability, such performance is highly desirable. (b) In cases where a bottleneck accumulated a number of pedestrians sufficient to block nearby exits, SimTread accurately portrayed the resulting crowd propagation. This allowed qualitative crowd analysis.

Correlation of Hardware in the Loop Simulation (HILS) and real control vehicle flight test for reducing flight failures

After development of simulation system in laboratory tests has been completed, before implementing an autonomous flight control system directly in a high speed UAV, the system needs to be tested in a ‘transitional’ vehicle namely Clouds aeromodeling, to make sure all devices of the control system function well in manual mode, stability and auto pilot by way point. Compatibility of setting gain PID in the simulation test with the real flight test becomes a challenge to ensure the success of the vehicle in flying, as probability of flight failures or target missing is reduced. This research has successfully proven the compatibility of the gain PID in an auto pilot by way point flight condition.

An active perceivable device–oriented modeling framework for hydropower plant simulation

To realize large-scale personalized customization of hydropower plant simulation system, this paper proposes active perceivable device–oriented modeling (APDOM) method from the perspective of dynamic coordination of intelligent hydropower devices. In APDOM, hydropower device is regarded as a basic modeling unit, which is endowed with intelligent perception and active service ability by integrating Service Oriented Architecture (SOA) and Event Driven Architecture (EDA). The direct coupling of models is eliminated so that it can execute on separate computers and achieves parallel distributed dynamic coordination. The modeling framework of supporting this method is provided, in which the definitions of core components such as active perceivable device, device bus, and perceivable message and its key implementation technologies are given. And the construction process of hydropower plant simulation based on this framework is demonstrated. Finally, an application instance of cascade hydropower plants illustrate that the APDOM and framework work effectively in solving large-scale customization development of hydropower plant simulation system.

Low-cost physiological simulation system for endovascular treatment of aneurysms

Abstract Minimally invasive procedures are more and more becoming the standard treatment for many surgical procedures such as the treatment of cerebral aneurysms. In an endovascular procedure the aneurysm is filled with flexible platinum coils leading to embolization and blocking the blood flow in the aneurysm. This established treatment needs high skills and experience on the surgeon. In order to practice and plan a specific procedure or test a new device, a realistic simulation environment is needed. Modern 3D printing technology allows the fabrication of patient specific models incorporating the exact geometry of the pathological anatomy. This article describes the development of a low-cost physiological simulation system for the training of the endovascular treatment of aneurysms. In order to practice the procedure in a realistic scenario, a 3D printed model of the aneurysm is embedded in a fluidic simulation s ystem. In addition to the patient-specific anatomy of the aneurysm a pulsatile water flow is generated, which emulates the influence of blood flow on the behaviour of catheters and coils during deployment. The system consist of a controllable pump circuit generating a pulsatile flow which can be regulated automatically and additionally controlled externally by the user. For a suitable representation, a display which graphically represents the sensor data and settings is employed. The components were compactly integrated in a small case allowing for easy deployment in training workshops. The simulation setup was successfully tested in prospective patient specific treatment planning and workshops for students.

Development of a Virtual Equipment Training System Based on Multi-platform Integration

Aiming at the shortcomings of the existing equipment virtual training system and simulation system development platform, which is backward and the simulation effect is poor, the development of a multi-platform integrated virtual training system for a certain equipment is put forward. Through the 3Dsmax geometric model modeling and behavior modeling of Unity3D platform equipment equipment operators, to achieve the basic functions of virtual training system, and combined with other software development characteristics and advantages, the advantages of Flash applied to the virtual training system of equipment. The results show that: It is entirely feasible to develop a virtual training system based on the Unity3D platform. Combined with the combination of 3Dsmax and Flash, the effect of a certain type of equipment simulation is more realistic than the previous single platform, and the human-computer interaction experience is better and can be widely used. It is used in virtual assembly and disassembly training and virtual maintenance of complex equipment.

Development and application of CATIA-based interference simulation system for tube bending

Aiming at the urgent demands for precise and intelligent forming of complex bent tubular components, this paper reviews the developments of tube bending related simulation technologies. Combined with the advantages of finite element (FE) simulation analysis and geometry motion simulation analysis, the present work is proposed to establish a knowledge base of tube bending simulation based on the knowledge engineering technology, and to develop an interference simulation system of tube bending based on CATIA software. Through the application of interference simulation system in continuous tube multi-bending in civil aircrafts, the extraction of model data, selection of process parameters, FE simulation of single bending segment, geometry simulation of continuous multi-bending, generation of simulation reports and numerical control codes can be automatically realized, and the bending quality and interference situation can be simultaneously obtained. Using the interference simulation system, the product efficiency of aircraft duct components can be greatly improved, and the labour cost and working intensity of technicians can be significantly reduced.

Development of kinematic simulation system for high-speed press line automated feeding robot

High-speed press lines are related to the fierce competition in the automobile industry and rely on continuous high-efficiency automated feeding systems. Kinematic simulation systems have facilitated the improvement of production processes by generating real-time kinematic curves to avoid interference in feeding systems. In this article, a new method based on quintic polynomials in MATLAB and ADAMS is introduced to achieve whole-line planning using a kinematic simulation system for path planning. Furthermore, secondary interface is developed to visualize the kinematic curves and animate the generated whole-line trajectories. The kinematic simulation system was found to improve the efficiency of generating predicted trajectories in joint or Cartesian space and achieved reliable whole-line path planning, including collision inspection and singular point detection, by using parametric modeling and analyzing kinematic curves. Finally, the kinematic simulation system was verified using results of a kinematic analysis and example simulation.

Development of Intelligent Distribution Network Simulation System Based on Distributed Generation

With the rapid development of distribution network and distributed power generation, and the improvement of network intelligence and digitization, intelligent power consumption and the access of distributed power generation access, as the main function of intelligent distribution network, has impact on the operation of intelligent distribution network. A simulation system based on the intelligent power consumption system, photovoltaic generation, wind power generation and other distributed generations is researched and developed. By researching the operating characteristics of each subsystem, the protection and control strategy of intelligent distribution network, it can be used to research the influence of distributed power generation and intelligent power consumption on the operation of intelligent distribution network. At the same time, it can also be used as a training system.

Requirements engineering of Malaysian radiological medical emergency response simulator

ABSTRACTThe development of the Malaysian radiological medical emergency response simulator emphasized human factors according to the stakeholder's tacit and explicit knowledge. These human factors criteria were usability tested and analysed according to the socio-technical components. These analyses and interpretations were corroborated by the statistical criteria which emphasized on business process-based requirements modelling and simulation system development tools. Recent findings suggested that there were no differences of risk perceptions among these multi-agency stakeholders in the respective emergency planning framework and simulator. However, the stakeholders had differences in knowledge and experiences in the radiological and nuclear emergency planning framework (RANEPF). This paper analyses the proposed conceptual framework for further enhancement of the current RANEPF simulator. This development was in concurrence with the proposed hypothesis of the process factors and response diagram. The majority (75%) of the stakeholders and experts, who had been interviewed, witnessed and accepted that the simulator would be effective to resolve various types of disaster and resource management issues. We suggest further investigation to establish the additional functionality of the simulator as a strategist, condensed, concise, comprehensive public disaster preparedness and intervention guidelines to be a useful and efficient computer simulation.

Development and Application of Power Network Simulation System for Grid Connected Photovoltaic (PV) Generation System Test

Development and Application of Power Network Simulation System for Grid Connected Photovoltaic (PV) Generation System Test

Computer Drawing Method for Operating Characteristic Curve of PV Power Plant Array Unit

According to the engineering design of large-scale grid-connected photovoltaic power stations and the research and development of many simulation and analysis systems, it is necessary to draw a good computer graphics of the operating characteristic curves of photovoltaic array elements and to propose a good segmentation non-linear interpolation algorithm. In the calculation method, Component performance parameters as the main design basis, the computer can get 5 PV module performances. At the same time, combined with the PV array series and parallel connection, the computer drawing of the performance curve of the PV array unit can be realized. At the same time, the specific data onto the module of PV development software can be calculated, and the good operation of PV array unit can be improved on practical application.