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This paper is concerned with the fault diagnosis of three-phase full-bridge rectifier. A new approach is proposed to extract the fault features in both frequency and time domain. The integrated features are used for the training of an LM-BP neural network, which is then applied for the fault classification. The simulation experiments are implemented on the fault diagnosis model built in MATLAB/Simulink,...
Electric drives are a key technology for reducing energy consumption of industrial processes, for wind power generation and for enabling electric transportation. It has been observed that almost half of the global electrical energy is consumed by electric motor drives. The university course about modeling and control of electric drives must give the required knowledge to the students hence they are...
Mobile robotics became an important knowledge area. Led by the technological advances, the life spectancy increases, rising the senior citizens ratio. At the same hand, the cities growth turn on a more intense and dangerous traffic. Autonomous mobile robots can help in these situations, but still have a jeopardized application. In this sense, this work presents a contribution to development of nonholonomic...
Thermoelectric generators (TEGs) are used for the direct conversion of heat energy into electricity. Given that there is an extreme concentration of heat present on house roofs, the application of TEGs on these locations is feasible. This study involves the modeling of thermoelectric generators on house roofs through the use of simulations and an actual prototype. Simulations were done using the matrix...
There are few of transient control models are adapted to asynchronous induction coil launcher (AICL) with air core coil. Thus, many papers about AICL were written with the goal of increasing muzzle velocity of projectile. This paper concentrate on how to control the projectile speed and thrust accurately by using improved current filament (CF) method and variable voltage variable frequency (VVVF)...
The paper presents the method of digital modelling of process of switching on by vacuum switch in capacitive circuits. Currently, there are few descriptions of vacuum switch models used for capacitive circuits switching on. More often researchers focus on vacuum switch models used for switching of the circuits (also previous works of the Authors) and even more often models used for switching of the...
This paper presents the design and implementation of a position controller for a rotary platform driven by a DC motor through state feedback. The main objective in this development is to make an electromechanical system and position control for a rotary platform using a 12 volts DC motor with quadrature encoder. The design and development stages were executed using computational tools such as Matlab...
A future soldier carries a large gear weight in the battle because of increasing in the number of electronic devices such as communication equipment, sensors, or battlefield situational displays. These devices are necessary to save his life and ensure the victory in the combat. So, the wearable energy harvesting technology is the optimal solution to provide the energy to the soldier's electronic devices...
Cam follower mechanisms are used for obtaining complex motion outputs at follower end with different profile curve inputs at cam end. The kinematic behaviour of follower establishes basic suitability of cam for a given application and it is decided by the cam profile curves, which is main input of cam follower system. In this paper synthetic curves, that are generated parametrically through a set...
A novel pressure control system based on a centrifugal pump Simulink model is proposed aiming to reduce energy consumption during pump operation. The system developed provides the possibility of power reduction during pressure maintenance with the help of mixed pressure control strategy. To evaluate the system, a series of tests have been conducted that proved that the designed system is more beneficial...
The purpose of this paper is to present a brief comparison between a conventional hexacopter and a cant angle hexacopter. A conventional hexacopter has got all its 6 rotors fixed and thrusted upwards in the body frame which gives it a decoupled 4 DOF motion or a coupled 6 DOF motion. But a cant angle hexacopter has all its six rotors canted at an angle tangentially to the radius of the frame. It provides...
Quad copters are VTOL aerial robot systems and has complex dynamics in spite of its simple design. In the present work, a quadcopter of plus configuration is assembled and its flight characteristics are experimentally studied. To stabilize the system during its flight a KK multicopter platform is used. Flight stabilization is done and data of motor input voltage is acquired using a arducopter flight...
The modeling and the simulation of triple junction solar cells had been addressed in earlier research works. But there are many new cells with parameters not released by the manufacturers yet. The aim of this paper is to simulate the behavior of a C3MJ+ triple-junction solar cell by determining its J-V characteristics curve and its P-V curve. The maximum voltage, current density and power will be...
In this paper, a PLC controlled simulation of a coupled tank system based on an existing dual-tank educational process control plant is developed. A critical analysis of the plant is carried out in order to obtain all the required parameters to setup the simulated model. Unlike the actual plant, the virtual process control model is not limited to two tanks only but may be reconfigured with ease in...
In this paper, the simulation environment is proposed that enables accurate full-scale investigation of the pressure adjustment for a centrifugal pump. The novel Matlab model is described, the pumping control procedure is explained, and the simulation results are assessed with the help of an experimental pumping test bench. Basing on thorough inspection of the developed software, the offered toolbox...
The article deals with the problems of heat transfer through solids. The calculation of the thermal resistance of the system consisting of several layers of solid materials having different thermal resistances on the intensive calculations and the time. In the first part we law of calorimetry equation. On this basis, we can build a theory of one-dimensional and multi-dimensional differential equation...
Overcurrent relay is an important relay used to protect transmission and distribution feeders, transformer, bus coupler etc. It can be used as main or backup protection relays. The modeling of overcurrent relay and other protection relays is important in the research on the effects of network parameters and configurations on the operation of these relays. This research deal with modeling and simulation...
The aim of this study is to make simulations with Matlab/Simulink to be used in the production phase of the autoclave in the sterilization unit. Sterilization unit is very important in terms of hospital employees and patients for protecting from infections and accidents. The study examined autoclave equipments that are fabricated based on the EN standards, then mathematical calculations were performed...
Due to the increase of the train velocity, the pantograph-catenary arc occurs even more frequently, which results in severe erosion on the pantograph pan and the catenary wire. This leads to a serious threat to the normal operation of the pantograph-catenary system. As the level of the arc erosion has a close relationship with its energy, it is necessary to study the influencing factors and suppression...
Attitude and altitude control of quadrotor is investigated in this paper. Stable sliding surfaces are used for devising robust control for roll, pitch, yaw motion and altitude. Gao's power rate reaching law is used to devise proposed sliding mode controllers. The robustness of the controllers is verified in simulation. The method is validated in MATLAB simulation. The proposed controller is compared...
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