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New graphical user interface is presented that is intended for the design, simulation and teaching in electrical engineering. The software is written using Wolfram language. It has properties of similar software simulators, but it is open for further automated symbolic manipulations. The main feature is fast drawing of systems with the appropriate visual assistance.
To achieve predefined Gz load profile in high G training in human centrifuge, it is necessary to determine angular velocity and acceleration of a planetary axis (centrifuge arm). Initial value problem that can not be solved in closed form was obtained. Several discretization methods for calculating angular velocity of centrifuge arm driven by DC servo motor are presented. Simulations are performed...
Android platform based devices are powerful mobile computers with a rich variety of built-in sensors and permanent Internet connectivity. Because of its powerful capabilities, as well as open architecture, they became promising candidates for a number of industrial applications. This paper describes the process of implementation and use of application for remote control of industrial robot Lola 50,...
Parser testing represents the basis of compiler testing because the accuracy of parsing execution directly affects the accuracy of semantic analysis, optimization and object code generation. It should include tests for correct and expected, but also for unexpected and invalid cases. In this paper, techniques for testing the parser, as well as algorithms and tools for test sentence generation are discussed...
The efficient implementation of a selective multiplierless lowpass digital FIR filter is a desired solution for low-power consumption applications. The simplest way is to start the design procedure that is based on predefined efficient filter structure. The computer algebra system can be used for the automated design procedure. The proposed solution is especially attractive in cases when the same...
The efficient implementation of selective multiplierless digital FIR filter is very desired solution for low-power consumption applications. Filter requirements such as sharp transition and large stop-band attenuation require very high filter order and usually large power consumption. The solution of this problem can be to use predefined hardware filter structures with small number of operations per...
This paper presents a proposed approach to the classification of rolling element bearing faults. The approach consists of vibration signal acquisition, digital signal processing, feature extraction from the vibration signal and classification into functional or defective rolling element bearing. Digital signal processing includes signal decomposition and de-nosing using wavelets. An 18-dimensional...
In the process of defining commands and developing algorithms for movements of complex and massive devices, such as human centrifuge, it is unsafe and demanding to perform testing on the real machine. Getting overview of devices operations might be of great importance especially before the final realization. This paper presents a system for programming and simulation of the human centrifuge motion...
Before the development of robotic systems, it is of great importance to perform verification of various types of scenarios within the machine work and testing. That is especially important in designing the machine with new control logic, before releasing the machine. This paper describes 3D simulator, as part of the offline system, within distributed system for robot control. It is developed in Lola...
In this paper principles of modeling of a human centrifuge for pilot training, as a 3 DoF manipulator, are presented. The basis is a kinematic and dynamic model of the manipulator. The centrifuge represents a manipulator with three revolute joints. According to the D-H convention transformation matrices for the manipulator were derived. The problem of direct and inverse kinematics and dynamics is...
This paper presents distributed real-time robot control system implemented on the client and server modules. The client module is used to control the real robot and send commands to the server module. An application on the server side receives the commands that contain positions of robot joints read from encoders, displays current robot coordinates and 3D robot motions through virtual model of a real...
L-IRL (Lola Industrial Robot Language) is procedural language for industrial robot programming. Offline and real-time programming system are main parts of robot programming system based on L-IRL programming language. System for robot programming is using object code as one of the main communication tools between different elements of the system. In this paper we have presented how object code of the...
Making of conclusions and diagnoses based on images may require enhancing visibility of some image details. Usage of color mapping and transfer functions is a key element of the visualization of medical images, particularly for display of 3D images using volume rendering. This paper presents a compact, simple, comfortable and responsive editor for coloring of grayscale images, which can be easily...
In many analysis based on estimation the parameters of probability distribution functions, the algorithms are developing for unknown probabilities. Some algorithms are derived starting from previous solutions and algorithms. One very popular algorithm is the EM (Expectation-Maximization) algorithm. The EM algorithm is a starting point for developing other advanced algorithms. Features of EM and other...
The paper presents the design of analog filter based on known poles of all-pole approximation. The design procedure is illustrated on several LC ladder filter and have an effect on of the element tolerances of L and C. The whole process of the design and optimization is automated using computer algebra system — software Mathematica.
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