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In the last years the European Space Agency (ESA) has developed several programs that support the creation of small satellites, called CubeSats, by different universities from within the member states. Because of their limited size, those satellites can pack, at most, very small attitude control devices which can generate only some limited torque. It is thus important for the designers to be able...
In this work, it was developed a computer platform for risk management and analysis the risk of loss of human life, according to the new ABNT-NBR 5419:2015 standard applying a calculation routine with the purpose of facilitating the job of the professionals who need to follow this standard in the execution and verification of the necessity of LPS project, Lightning Protection System, in the structure...
Detection effectiveness of the airborne early warning radar is affected by its detection range as well as its detection probability. This paper presents a method for simulating and evaluating the detection effectiveness of the airborne early warning radar. Firstly, the detection model of the airborne early warning radar is designed. Secondly, based on the radar system parameter as well as the motion...
Build in test (BIT) design is an essential way of improving testability and availability in avionic systems. Matlab based Simulink-Stateflow is an effective tool of conducting BIT design verification at airplane designing stage. In this paper, a detailed BIT Stateflow modeling procedure for a typical avionic power circuit is given with an elaborate description of circuit and Stateflow model functional...
Considering that the physical demonstration is difficult to implement in the real test experiment, and the complete simulation verification is difficult to satisfy the requirement. This paper designs a semi-physical demonstration system based on LabVIEW and MATLAB, and realizes the synchronous diagnosis of the state graph simulation model and hardware. The design principle of the slave computer and...
Unmanned Aerial Vehicles (UAVs) have been used in a wide range of applications, due to high availability and low cost of their core components. One subject of research in the UAV field is the formation flying of a group of aircraft. In this paper, it is described the problem formulation for a formation of UAVs and the control law used to keep the aircraft in position. Following the theoretic model...
This paper deals with the modeling of high performance motor-drive systems for aerospace applications. Losses in the electronic power converter based on Silicon Carbide (SiC) technology are evaluated. This power converter drives a high performance brushless AC (BLAC) fault tolerant multiphase machine for aerospace applications. The co-simulation model is developed using Matlab-Simulink and Ansys-Simplorer...
The article describes the options of passive detection of Unmanned Aerial Systems (UAS), which are not a subject of the X supplement published by Civil Aviation Authority of the Czech Republic. The beginning of the article contains analysis of basic UAS characteristics in acoustic area. In this part some systems for UAS detection using acoustic methods are mentioned. The following part of the article...
This paper presents the modeling and simulation of a photovoltaic (PV) system. The equations governing the operation of the one-diode equivalent model are developed and the identification of the model parameters is performed through MATLAB script. The system studied encompasses a commercial PV panel, a dc-dc boost power converter, a battery and a dc load. The boost converter is controlled using voltage...
Each day comes, the sector of autopilot and Unmanned vehicles get bigger exponentially; the autopilot design process plays an essential role in the unmanned aerial vehicle (UAV) development process. Autopilot can be designed and developed using different approaches depending on the control theory which is adopted in this paper Proportional-integral-derivative (PID) is adopted. Testing of autopilot...
The work is intended to create and analyze mathematical model, to compare it with created information model. Matlab and Simulink is used for mathematical and information model creation correspondingly.
Solar Energy is one of the very promising renewable energy resources which have grown rapidly in the past few years and presently it is gaining popularity and momentum at an ever increasing rate. But there are also some limitations for trapping Solar Energy. A major disadvantage of trapping Solar Energy in photovoltaic cells is that it's operating point changes with changing insolation and temperature...
This paper presents the modeling and simulation of voltage unbalance for AC electric railway systems. The development is based on MATLAB/Simulink program to determine voltages at the substation. The voltage unbalance factor (VUF) is used for this evaluation. Suvarnabhumi Airport Rail Link (ARL) in Bangkok, Thailand, is chosen for test. This test system is supplied by a cyclic winding connection of...
This paper presents the study of the seawater desalination process, by humidification-dehumidification, via an agricultural greenhouse with solar collectors.
Thermodynamic models are a perfect tool to describe heat engines. But such thermodynamic model must be extended to reflect reality as accurately as possible. Micro turbo compressor engines are a specific type of heat engines that are derived from normal turbo compressor engines. To compute their thermodynamic parameters we need to know their dimensions and choose many coefficients, which describe...
Change from a resting state to a full launch on any device that has the characteristic of flight and vertical landing is a major challenge when the control system must be designed. In this sense, there are different effects that alter its dynamics. In this paper, an experimental method based on pseudo-random bit signals (PRBS) is proposed to identify the transfer function of a vertical take-off and...
According to the mathematical model of a brushless DC motor, using MATLAB / Simulink to build various independent functional modules, and integrated into the simulation model of brushless DC motor control system. The system uses the double loop of control mode, including the inner current loop and the outer speed loop, to ensure that the motor is performance well in the high and low speed, and system...
This article presents a model library of generic components to build virtual Avionics Full Duplex Switched Ethernet (AFDX) networks. The presented library is a blockset for MATLAB/Simulink. The functional behavior of the simulation library's basic building blocks represent the scheduling and routing in AFDX end systems and switches on frame level. The graphical nature of Simulink allows to model AFDX...
Development processes of software for safety critical, complex aircraft systems, for example flight control systems, are very demanding. In the context of an aircraft certification, strict process guidelines and objectives from the Radio Technical Commission for Aeronautics according to the Development Assurance Level of the Software have to be complied to. Efficiency and compliance are important...
We introduce the open-source MATLAB® toolbox bldg. The main function, bsim, simulates a simple building under forcing from the outdoor air temperature, sun, and internal heat sources. bsim retains the mathematical structure of state-of-the-art building simulators, including time-varying solar forcing, PDE-governed wall temperatures, and nonlinearities arising from thermal radiation and temperature-dependent...
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