Fault diagnosis of angle grinders and electric impact drills using acoustic signals

In this paper, to solve the problem of detecting network anomalies, a method of forming a set of informative features formalizing the normal and anomalous behavior of the system on the basis of evaluating the Hurst (H) parameter of the network traffic has been proposed. Criteria to detect and prevent various types of network anomalies using the Three Sigma Rule and Hurst parameter have been defined. A rescaled range (RS) method to evaluate the Hurst parameter has been chosen. The practical value of the proposed method is conditioned by a set of the following factors: low time spent on calculations, short time required for monitoring, the possibility of self-training, as well as the possibility of observing a wide range of traffic types. For new DPI (Deep Packet Inspection) system implementation, algorithms for analyzing and captured traffic with protocol detection and determining statistical load parameters have been developed. In addition, algorithms that are responsible for flow regulation to ensure the QoS (Quality of Services) based on the conducted static analysis of flows and the proposed method of detection of anomalies using the parameter Hurst have been developed. We compared the proposed software DPI system with the existing SolarWinds Deep Packet Inspection for the possibility of network traffic anomaly detection and prevention. The created software components of the proposed DPI system increase the efficiency of using standard intrusion detection and prevention systems by identifying and taking into account new non-standard factors and dependencies. The use of the developed system in the IoT communication infrastructure will increase the level of information security and significantly reduce the risks of its loss.

A Software Deep Packet Inspection System for Network Traffic Analysis and Anomaly Detection.

The development was carried out using the Qt5.2 integrated development environment, which uses the programming language C++. The main advantage of this environment is that the code written in it can be compiled to different platforms (for example, Windows, Linux, Mac OS). A software router based on a modular architecture has been developed. It uses the socket technology, which allows forming a program-oriented packet network with any topology, including full-coupled topology. A network traffic generator to test the developed software router has been designed. We proposed a scheme to measure the packet processing time of a router using a specialized packet-capture network interface cards (NIC 1 and NIC 2) and a novel traffic generator installed on PC. Based on an experimental test bed we confirmed that our software router provides a cost-efficient alternative to the expensive, special hardware router CISCO 2801.

https://www.mdpi.com/2079-9292/9/1/40/pdf

A Cost-Efficient Software Based Router and Traffic Generator for Simulation and Testing of IP Network

Classification and comparison of rotor temperature estimation methods of squirrel cage induction motors

Abstract The simplified metrological software test (MST) for modeling the method of determining the thermocouple (TC) error in situ during operation is considered in the paper. The interaction between the proposed MST and a temperature measuring system is also reflected in order to study the error of determining the TC error in situ during operation. The modelling studies of the random error influence of the temperature measuring system, as well as interference magnitude (both the common and normal mode noises) on the error of determining the TC error in situ during operation using the proposed MST, have been carried out. The noise and interference of the order of 5-6 μV cause the error of about 0.2-0.3°C. It is shown that high noise immunity is essential for accurate temperature measurements using TCs.

/pdf/metrological-software-test-for-simulating-the-method-of-4x7xs8tb9b.pdf

Metrological Software Test for Simulating the Method of Determining the Thermocouple Error in Situ During Operation

In this paper the data acquisition module based on sigma-delta analog to digital converter (ADC) and MCS-51 compatible microcontroller with dynamic remote reprogramming is presented. The main feature of presented module is in integral nonlinearity of ADC correction. The error of proposed correction is considered in this paper.

/pdf/precision-data-acquisition-daq-module-with-remote-3tt23rjckr.pdf

Precision Data Acquisition (DAQ) Module with Remote Reprogramming

There is proposed method of control which could be implemented for heaters situated across electrodes of the main thermocouple and provides stabilization profile of temperature field. The proposed method has small requirements to memory space and computing power so it could be implemented using 8-bit microcontrollers.

The control system of the profile of temperature field

Abstract The method of study and experimental researches of the error of method of the thermocouple with controlled profile of temperature field along the main thermocouple are considered in this paper. Experimentally determined values of error of method are compared to the theoretical estimations done using Newton’s law of cooling. They converge well.

/pdf/theoretical-and-experimental-research-of-error-of-method-of-4swiid3byh.pdf

Theoretical and Experimental Research of Error of Method of Thermocouple with Controlled Profile of Temperature Field

The analysis of implementation methodology of sound metric stations AZK-5 and AZK-7, which are adopted by the Armed Forces of Ukraine and some other countries, shows that this methodology provides an approximation of the secondorder curve – hyperbola, which describes the location of the target by its asymptotic rays. This approximation provides simplification of algebraic and geodesic computing. Nevertheless, it causes the emergence of methodology error of target bearing process. The implementation of the geometrical model for acoustic base description provides the development of a mathematical model, which analytically describes the mentioned above error. Analysis of this mathematical model of methodic error envisages that its value can significantly exceed an instrumental error of involved sound metric stations if the distance to the target slightly exceeds the distance between sound receivers. The correction of this error is not provided by active methodology of sound metric station implementation. Also, analysis of error shows that it is systematical. Therefore, measurement of the target coordinates and counter-battery fire correction by the same sound metric stations provides significantly decreasing its influence on target hitting. However, this error complicates the compatibility of measurement results both with other sound metric stations and with other types of intelligence. Providing the compatibility of measurement results by sound metric stations with other stations and other types of intelligence demands the correction of the error of measurement method for the distances to the target less than 6–7 lengths of acoustic base or implementation of other, most exact methods of angle computation.

/pdf/methodical-error-of-targets-bearing-by-sound-artillery-2rnjvbv6b5.pdf

Methodical error of targets bearing by sound artillery intelligence system

A structure of instrumentation for express-diagnostics of acute viral infection and mycotocsicosis is proposed. It includes an optoelectronic sensor based on surface plasmon resonance and uses artificial neural networks for sensor's signal processing. As result the reliability of diagnostics and resource of developed analytical instrumentation was increased. Using the sensor structures features for saving its parameters allowed to develop the viral-independent measurement transducer.

Implementation of SPR-Biosensors for Express-Diagnostics of Acute Viral Infection and Mycotocsicosis

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