Reliable Centralized Control of PMSM

In this paper, we introduce the development methodology of a reliable centralized control applied to a synchronous permanent magnet machine. The proposed system is nonlinear, we linearize around a point of application. The resulting model will then be used to reproduce the dynamic behavior of the machine for a reliable control. The controller is based on the standard h infinite to increase performance, reduce measurement noise, and to tolerate the outage of certain sensors. To illustrate the results, we made a comparison between a standard state feedback control and reliable h infinite robust control. The simulation results shows, that the system in case of technical placements poles loses classic performance in the presence of an outage, that the reliable centralized robust control remain satisfactory performance even in the presence of outage.

Skeletal muscle interaction synergetic effects during a complex acyclic motor action performing

The study showed the sambo wrestlers’ muscle synergies’ spatial-temporal structure, extracted using the PCA method. We considered the individual periods of the "leg grabbing" throw coordination structure. It was revealed the electrical activity of extensive synergies changes depending on registered muscular efforts values, typical for different periods of the performed movement. The synergetic effects of skeletal muscle interaction demonstrate plasticity, manifested in typical patterns of spatial and temporal activation of revealed muscle synergies, which ensures reliable control of motor function in various periods of complex movement coordination performing. Key words: muscle synergies; synergetic effects; intermuscular coordination; motion control, skeletal muscle.

Focal beam structuring by triple mixing of optical vortex lattices

On-demand generation and reshaping of arrays of focused laser beams is highly desired in many areas of science and technology. In this work, we present a versatile approach for laser beam structuring in the focal plane of a lens by triple mixing of square and/or hexagonal optical vortex lattices (OVLs). In the artificial far field the input Gaussian beam is reshaped into ordered arrays of bright beams with flat phase profiles. This is remarkable, since the bright focal peaks are surrounded by hundreds of OVs with their dark cores and two-dimensional phase dislocations. Numerical simulations and experimental evidences for this are shown, including a broad discussion of some of the possible scenarios for such mixing: triple mixing of square-shaped OVLs, triple mixing of hexagonal OVLs, as well as the two combined cases of mixing square-hexagonal-hexagonal and square-square-hexagonal OVLs. The particular ordering of the input phase distributions of the OV lattices on the used spatial light modulators is found to affect the orientation of the structures ruled by the hexagonal OVL. Reliable control parameters for the creation of the desired focal beam structures are the respective lattice node spacings. The presented approach is flexible, easily realizable by using a single spatial light modulator, and thus accessible in many laboratories.

Design and Control Motorized Circuit Breaker in Electrical Distribution Panel

A circuit breaker is the main part of the distribution panel that needs to control for safe operation. It is important for protection and switching in the power system. Automatic control of circuit breakers using motorized can be realized by the microcontroller scheme. In this paper, a microcontroller equipped with wifi and an internet connection is used to control and monitoring the circuit breaker. The design of the circuit is proposed and experiment result is obtained. The response time is about 1 second to complete the process to control the circuit breaker. Error in monitoring application is about 3% for voltage measurement and 3.5% for current measurement. The proposed circuit system showed good and reliable control and monitoring of circuit breakers in every condition include of closing, opening, and monitoring.

Application of Photogrammetric Methods for Geotechnical Monitoring of Emergency Buildings and Structures

Постановка задачи. Одной из актуальных научно-технических задач в строительстве является совершенствование методов мониторинга состояния строительных конструкций (в том числе в стесненных условиях работы) при строительстве уникальных сооружений и объектов незавершенного строительства, обеспечивающих надежный контроль их качества, устойчивости и безопасности. Довольно часто возникают условиях, при которых нет возможности выполнить полноценный мониторинг отдельных видов деформаций строительных конструкций традиционными методами. Требуется разработка универсальных, надежных и удобных методов контроля различных геометрических параметров сооружения с целью своевременного принятия мер по обеспечению стабильности и устойчивости сооружения, чтобы исключить переход сооружения в ограниченно работоспособное или в аварийное состояние. Результаты и выводы. Предложенные в работе методы определения деформаций и качества изготовления строительных конструкций с использованием метрической фотосъемки позволяют провести полноценный мониторинг их технического состояния с необходимой точностью. Все перечисленные в статье способы контроля отрабатывались и проверялись на зданиях и сооружениях законсервированной Воронежской атомной станции теплоснабжения. Statement of the problem. One of the urgent scientific and technical problems facing construction is the improvement of methods for monitoring the state of building structures (including under confined working conditions) during the construction of unique structures and objects of unfinished construction, ensuring reliable control of their quality, stability and safety. Oftentimes, conditions arise where it is impossible to perform a full types of deformations of building structures using traditional methods. It is required to develop universal, reliable and convenient methods for controlling various geometric parameters of the structure in order to take timely measures to ensure the stability and stability of the structure in order to exclude the transition of the structure to a partially operable or emergency state. Results and conclusions. The suggested methods for determining deformations and the quality of manufacturing of building structures using metric photography make it possible to conduct a full-fledged monitoring of their technical condition with the required accuracy. All the control methods listed in the article were developed and tested on the buildings and structures of the mothballed Voronezh nuclear heat supply station.

Control of Concentrated Solar Direct Steam Generation Collectors for Process Heat Applications

Solar Direct Steam Generation (DSG) systems are well suited for process steam applications and are able to provide steam at the pressure required by common industrial processes. Nevertheless, reliable control has always been a challenge for solar DSG system hindering its wider adoption. In this paper, a control strategy for solar DSG systems is presented. The control strategy is based on PID control theory combined with model-based feedforward control. Experimental data demonstrate that the control strategy provides good performance in terms of stability and setpoint tracking. The error in setpoint tracking for the load pressure controller is shown to be as low as 0.005 MPa under real life conditions. The said strategy is currently implemented in two commercially operating plants providing solar steam for industrial processes.

ANALYSIS OF METHODS FOR CONTROLLING THE ACCURACY OF PAINT MATCHING

К числу основных контролируемых показателей, характеризующих качество многокрасочного изображения на печатном изделии, относится совмещение красок. Совмещение красок на оттиске представляет собой технологическую операцию, состоящую в нанесении на запечатываемую подложку отдельных печатных красок для формирования совмещенного многокрасочного изображения на печатном изделии в соответствии с требованиями его целостностности и информативности. Контроль и оценку совмещения красок на оттиске осуществляют различными методами и проводят по приводочным крестам, тест-объектам или по полученному изображению. Актуальность работы обоснована тем, что анализ запатентованных методов контроля совмещения красок при печатании и рекомендуемых стандартизированных методов показал, что для них свойственна высокая трудоемкость, наличие специальных устройств для проведения контроля, нестабильность оценки результата, а также они не обеспечивают нужную точность и объективность определения параметров совмещения красок. Это приводит к ухудшению качества напечатанных оттисков и появлению брака. В работе разработан алгоритм оценки смещения контрольных меток с применением оптических измерительных приборов и идентификацией полученного результата совмещения красок с вариантами компьютерного моделирования, с последующей статистической обработкой данных. Предложенный подход обеспечивает достоверность контроля совмещения красок и точность определения параметров его стабилизации (0,05-0,01 мм), а также позволяет объективно управлять процессом совмещения красок для обеспечения качества печатных изделий. One of the main controlled indicators that characterize the quality of a multicolored image on a printed product is the combination of colors. The combination of colors on the impression is a technological operation that consists in applying separate printing inks to the printed substrate to form a combined multicolored image on the printed product in accordance with the requirements of its integrity and informativeness. Control and evaluation of the combination of colors on the impression is carried out by various methods and is carried out on the drive crosses, test objects or on the resulting image. The relevance of the work is justified by the fact that the analysis of the patented methods of controlling the combination of paints in printing and the recommended standardized methods showed that they are characterized by high labor intensity, the presence of special devices for monitoring, instability of the result evaluation, and they do not provide the necessary accuracy and objectivity in determining the parameters of the combination of paints. This leads to a deterioration in the quality of the printed prints and the appearance of defects. The paper develops an algorithm for estimating the displacement of control marks using optical measuring devices and identifying the resulting result of combining colors with computer modeling options, followed by statistical data processing. The proposed approach provides reliable control of the color combination and the accuracy of determining the parameters of its stabilization (0.05-0.01 mm), and also allows you to objectively control the process of combining colors to ensure the quality of printed products.