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The parameter extraction method of De Soto is implemented in the single diode model and evaluated against measured data at varying temperatures and irradiances. The simulated current-voltage-curves (IV-curves) of the method can be seen as acceptable at reference conditions, but they result in a different IV-curve, not matching the measured IV-curve, at conditions that differ from the reference conditions...
The Mobile Cloud Network is an emerging cost and capacity heterogeneous distributed cloud topological paradigm that aims to remedy the application performance constraints imposed by centralised cloud infrastructures. A centralised cloud infrastructure and the adjoining Telecom network will struggle to accommodate the exploding amount of traffic generated by forthcoming highly interactive applications...
This paper describes a dynamic modeling and control of a multizone building where the thermal exchange, the coupling between the areas and the human occupation energy are taken into account. The thermal regulation in the building is ensured by a HVAC (Heating, Ventilation and Air Conditioning) system in which many parameters are involved. The HVAC systems are the main equipment for human life, but...
This paper presents a comparison of two logistic systems including an intermediate platform for the collection and delivery of containers with the maritime container terminals in Le Havre Port area. The first one uses a conventional operational organization of a set of rail shuttles. The second one SFM (‘Service Ferroviaire Modulaire’: modular rail service) is based on the first but with teleoperated...
This paper presents a model of battery powered electric vehicle with computer algorithm for calculation of optimal energy components. The goal of the research was to create a system which can optimize the vehicle battery and motor for the given driving cycle thus minimizing equipment expenses. Furthermore, paper describes tested vehicle, vehicle components modelling, measurement acquisition process,...
During locomotion, Autonomous Ground Vehicles (AGV) need to map the surface of the ground ahead in order to plan a safe route of passage. Algorithms that achieve this are all derived from a basic requirement to track pixels between successive frames. This paper establishes the effect of tracking error on depth estimation with different image-plane geometries and presents an argument for tight control...
This paper addresses the performance evaluation and optimisation of failure-prone manufacturing systems. For this purpose, we propose a fluid stochastic event graph model that is a decision-free Petri net and can be used to model transfer lines, kanban systems, etc. In this model, tokens are considered as continuous flows. A transition can be in operating state or in failure state. A transition in...
Simulation models have been extensively used in manufacturing to enhance the design, planning and decision making processes. However, the tendency has been to use simulation in one-off applications, often at the start of a project and not take account of inherent process changes over time. This has inhibited their contribution as a realtime decision make tool. This paper describes how simulation is...
Heat pumps are a more efficient method to heat water compared to conventional electrical heating systems. However, the harmful environmental effects of traditional CFC and HCFC refrigerants require more sustainable alternatives to be adopted. In marine applications, leaked HCFCs can cause substantial harm to sensitive coastal ecology and are powerful greenhouse gases. Standard CO2 (R744 when used...
Hybrid electric vehicles (HEVs) have emerged as near term sustainable technologies to reduce fossil-fuel dependency. The variation in fuel economy (FE) due to the variation in driving patterns exists in hybrid electric vehicles (HEVs). Powertrain component size optimisation based on a methodology considering a range of driving patterns including different traffic conditions and driving styles simultaneously...
Solar power plants collect available thermal energy in a usable form at the desired temperature range. Efficient operation requires a fast start-up and reliable operation in varying cloudy conditions without unnecessary shutdowns and start-ups. Fast and well damped linguistic equation (LE) controllers have been tested in Spain at a collector field, which uses parabolic-trough collectors to supply...
In this paper, the optimisation possibilities of a quasi-resonant induction cooker are investigated. Simulations show that main losses of the induction cooker occur in the heating coil and the RC-IGBT (power switch). The performance of the coil can be improved mainly by minimising the coil resistance. The IGBT-optimisation is based on the reduction of tail current in soft switching mode. The tail...
The optimal choice of switches within a hysteresis controller with a d-q-related constraint is discussed in this paper. The hysteresis controller controls a bidirectional two-level three-phase standard inverter. This paper expands the options of switching processes to a former published d-q-hysteresis controller. Despite a separate active and reactive hysteresis constraint which is offered, further...
Electric vehicles (EV) require energy storage with high power and high energy-density. A hybrid-storage-system combining battery (high energy density) and ultra-capacitor (high power density) to supply a motor is logical. This paper will present an efficient way of dimensioning the ultra-capacitor of this system. The optimal size is determined by applying real driving cycles to a dynamics simulation...
Solar power plants should collect any available thermal energy in a usable form at the desired temperature range. Efficient operation requires a fast start-up and reliable operation in varying cloudy conditions without unnecessary shutdowns and start-ups. Fast and well damped linguistic equation (LE) controllers have been tested in Spain at a collector field, which uses parabolic-trough collectors...
This paper presents an existing and operating Combined Cycle Power Plant (CCPP) dynamic simulation of a steam system and a condenser system. The base of the simulation was a CCPP from the northeast of Hungary. The environment of the simulation was MathWorks, and the used graphical programming and simulation tool was Simulink. This program allows us to carry out dynamical and static tests, finding...
This paper aims to report the state of the art of research in simulation-based optimisation of maintenance operations by systematically classifying the published literature and outlining various tools and techniques used by researchers to model and optimise maintenance operations. The authors investigate the critical elements and aspects of maintenance systems and how well they are represented in...
The European Electronic Toll Service (EETS) allows different possibilities for the overall system design of interoperable toll systems. We study the effect of the overall system design on the operational costs using a model based, holistic, executable specification. The model is set up to give an accurate description of the interdependences as seen in the German toll system. Two different scenarios...
A co-simulation on virtual prototype of a type of spot welding robot has been accomplished by combining MATLAB/Simulink with RecurDyn. The control algorithm is executed under MATLAB to generate command forces, which are then exported to RecurDyn environment and applied to actuators of the virtual prototype at each cycle of time. Dynamic control on joint angles was accomplished through the co-simulation...
In this paper, word-length optimization for a pipelined 8K FFT processor is presented. The processor is based on radix-2/4/8 and mixed radix algorithm, and SDF architecture is used. The internal word-length and data format are important issues when designing pipelined FFT processors, it will affect precision and gate number. To obtain a good solution, three Matlab models for the processor are developed...
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