Vol 5, No 15 (2017)
- Year: 2017
- Published: 21.11.2017
- Articles: 10
- URL: https://ogarev-online.ru/2311-2468/issue/view/18685
Full Issue
Parametric optimization of multi-component led system
Abstract
The paper deals with the estimation of the number of LEDs of different colors under the condition of minimizing the deviation of color temperature from the target value. The authors present a deterministic optimization approach that is applied dynamically creating a multi- led system that meets the requirements imposed on the chromaticity coordinates.
Improving sterilizer control efficiency at cannery production
Abstract
The article considers a practical realization of sterilizer control system used in the food industry for product canning. The authors suggest some approaches that allow to minimize sterilization energy costs by optimizing the temperature and pressure control.
Synthesis of control algorithms for 3D-printer step drives for implementation of prescribed movements
Abstract
The paper presents an original mathematical model of the step drive as a control object. Based on this model, the control algorithm for the stepper motor is determined. The issues of technical implementation of the synthesized algorithms are considered. The structural-functional scheme for the considered functional elements is provided. The authors also deal with the error positioning of the stepper motor and the choice of its angular velocity.
Recognition of visual images: an approach based on reference images and training
Abstract
The problem of recognition of visual images is considered and solved. The image is thought of as the concrete manifestation of the recognized object. The authors suggest an approach to recognizing visual images based on the use of reference image base and training procedure. This approach can be used to recognize handwritten text, to identify a person by biometric data, etc.
Remote monitoring semiconductor units of power electronic devices
Abstract
This article describes the principle of constructing diagnostic equipment for detecting potentially unreliable or failed semiconductor power devices in a group series circuit. The main blocks and their operating principles are described. The advantages of using remote diagnostics are considered.
Development of microcontroller control system for electric heating of residential building
Abstract
The article presents a device, based on the modern widely used universal controller Atmega 328 by Atmel, developed for monitoring and controlling the electric heating system. The main criteria of the device development were simplicity, low cost and wide use of the electronic components.
Use of the flow method for determining temperature of rotor for permanent magnet synchronous motor
Abstract
The paper presents an improved method for determining the temperature of the rotor for synchronous machines with permanent magnets at changing dynamic characteristics, driving a weakening of the main magnetic flux. The method largely depends on the cooling conditions. In the steady mode the temperature of the rotor can be determined using the equivalent thermal model. In the dynamic mode the temperature of the rotor can be determined by the introduction of the observer temperature in the structure of the equivalent thermal model. The study presents a thermal model describing the processes of changing the temperature of the electric machine.